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Updates

[2024-11-28] — Xdebug 3.4.0

New Features

Fixed bug #2281: PHP 8.4 support
Fixed bug #2239: Add 'XDEBUG_IGNORE' GET/POST/COOKIE/ENV to make the step debugger ignore that specific request

Improvements

Fixed bug #2261: Send control socket location in init packet

Fixed bugs

Fixed bug #2262: PHP 8.4: Closure names need different wrapping algorithm
Fixed bug #2283: SoapClient usage causes segfault with codecoverage
Fixed bug #2294: Nette Tester always crashes in all test jobs when running with XDebug 3.4.0beta1 active
Fixed bug #2304: Seg fault on throw exception
Fixed bug #2305: Segfault when checking whether to ignore creating a debug connection during shutdown functions
[2024-10-04] — Xdebug 3.4.0beta1

New Features

Fixed bug #2281: PHP 8.4 support

Fixed bugs

Fixed bug #2261: Send control socket location in init packet
[2024-05-31] — Xdebug 3.4.0alpha1

Fixed bugs

Fixed bug #2239: Add 'XDEBUG_IGNORE' GET/POST/COOKIE/ENV to make the step debugger ignore that specific request
Fixed bug #2262: PHP 8.4: Closure names need different wrapping algorithm
[2024-04-15] — Xdebug 3.3.2

Fixed bugs

Fixed bug #2216: With PHP8.3 and Apache 2.4.58 error_reporting() causing Apache process to hang
Fixed bug #2230: Crash when xdebug and blackfire extensions are active
Fixed bug #2233: High and continuous Apache server CPU use
[2023-12-14] — Xdebug 3.3.1

Fixed bugs

Fixed bug #2220: Test failure
Fixed bug #2221: Crash when other extensions run PHP code without the stack being initialised yet
Fixed bug #2223: Xdebug's constants are not available with `xdebug.mode=off`
Fixed bug #2226: xdebug_get_function_stack(['from_exception']) does not always find stored trace
Fixed bug #2227: Crash with return value and observers
Fixed bug #2228: Return value can not be fetched with property_get if top frame is an internal function
[2023-11-30] — Xdebug 3.3.0

New Features

Fixed bug #2171: Build from master fails on php 8.3
Fixed bug #1732: Add support for flame graph outputs
Fixed bug #2219: Add control socket on Linux to obtain information and initiate debugger or breakpoint
Fixed bug #1562: Add 'local_vars' option to 'xdebug_get_function_stack' to include variables for each st
Fixed bug #2194: Add 'params_as_values' option to 'xdebug_get_function_stack' to return data as values
Fixed bug #2195: Add 'from_exception' option to 'xdebug_get_function_stack' to return the stack trace where an exception was thrown

Improvements

Fixed bug #2077: Bring back xdebug.collect_params
Fixed bug #2170: Show contents of Spl's ArrayIterator
Fixed bug #2172: Show contents of SplDoublyLinkedList and SplPriorityQueue
Fixed bug #2183: Bubble up exception message when using code evalution through protocol
Fixed bug #2188: Step over with fibers does still step into fiber routines
Fixed bug #2197: Add time index and memory to output of xdebug_get_function_stack
Fixed bug #2203: Increase default max nesting time out from 256 to 512
Fixed bug #2206: Optimise debugger breakpoints checking
Fixed bug #2207: Add filenames for include and friends to flamegraph output
Fixed bug #2217: xdebug://gateway pseudo host does not support IPv6

Fixed bugs

Fixed bug #450: "Incomplete" backtraces when an exception gets rethrown
Fixed bug #476: Exception chaining does not work properly
Fixed bug #1155: Local variables are not shown when execution break in error_handler
Fixed bug #2000: Dubugger evaluate expression: "can't evaluate expression"
Fixed bug #2027: Branch/path code coverage for traits drops trait name since 3.1.0
Fixed bug #2132: Errors when mountinfo does not have enough information for finding systemd private tmp directory
Fixed bug #2200: PECL package file has wrong max PHP version number, and peclweb refuses the package
Fixed bug #2208: Superfluous `...` (three omission dots) in var_dump()
Fixed bug #2210: Flamegraphs crash when using `start_with_request`
Fixed bug #2211: File wrappers get wrong filename location in stack.
Fixed bug #2214: Array keys aren't escaped in traces
[2023-10-19] — Xdebug 3.3.0alpha3

Fixed bugs

Fixed bug #1732: Add support for flame graph outputs
Fixed bug #2000: Debugger evaluate expression: "can't evaluate expression"
Fixed bug #2077: Bring back xdebug.collect_params
Fixed bug #2203: Increase default max nesting time out from 256 to 512
Fixed bug #2206: Optimise debugger breakpoints checking
[2023-09-06] — Xdebug 3.3.0alpha2

Fixed bugs

Fixed bug #2200: PECL package file has wrong max PHP version number, and peclweb refuses the package
[2023-09-06] — Xdebug 3.3.0alpha1

New Features

Fixed bug #2171: Preliminary support for PHP 8.3

Improvements

Fixed bug #1562: Add 'local_vars' option to 'xdebug_get_function_stack' to include variables for each st
Fixed bug #2170: Show contents of Spl's ArrayIterator
Fixed bug #2172: Show contents of SplDoublyLinkedList and SplPriorityQueue
Fixed bug #2183: Bubble up exception message when using code evalution through protocol
Fixed bug #2188: Step over with fibers does still step into fiber routines
Fixed bug #2194: Add 'params_as_values' option to 'xdebug_get_function_stack' to return data as values
Fixed bug #2195: Add 'from_exception' option to 'xdebug_get_function_stack' to return the stack trace where an exception was thrown
Fixed bug #2197: Add time index and memory to output of xdebug_get_function_stack

Fixed bugs

Fixed bug #450: "Incomplete" backtraces when an exception gets rethrown
Fixed bug #476: Exception chaining does not work properly
Fixed bug #2132: Errors when mountinfo does not have enough information for finding systemd private tmp directory
[2023-07-14] — Xdebug 3.2.2

Fixed bugs

Fixed bug #2175: Crash with EXC_BAD_ACCESS in xdebug_str_create
Fixed bug #2180: Crash on extended SplFixedArray
Fixed bug #2182: Segfault with ArrayObject on stack
Fixed bug #2186: Segfault with trampoline functions and debugger activation
[2023-03-21] — Xdebug 3.2.1

Fixed bugs

Fixed bug #2144: Xdebug 3.2.0 ignores xdebug.mode and enables all features
Fixed bug #2145: Xdebug 3.2.0 crash PHP on Windows if xdebug.mode = off
Fixed bug #2146: apache2 segfaulting with version 3.2.0 on PHP 8.0
Fixed bug #2148: Icon for link to docs in xdebug_info() HTML output does not always render correctly
[2022-12-08] — Xdebug 3.2.0

New Features

Fixed bug #1819: Allow a list of headers in 'xdebug.client_discovery_header'
Fixed bug #2079: Add pseudo hosts xdebug://gateway and xdebug://nameserver
Fixed bug #2086: Include return value in return breakpoint interruption response
Fixed bug #2087: Introduce step for the return state and virtual property for return value

Improvements

Fixed bug #2062: Xdebug now records whether systemd's PrivateTmp is used in its diagnostics information
Fixed bug #2104: Add support for PHP 8.2 "SensitiveParameter" attribute
Fixed bug #2117: Removed emulated properties for closures, as PHP 8.2 adds debug information for them
Fixed bug #2122: Local variables are now available when using start_upon_error
Fixed bug #2123: Add warning in log and diagnositics information when a breakpoint is set on a non-existing file
Fixed bug #2136: Duplicate line/conditional breakpoints are not rejected
Fixed bug #2138: Step debugger now disconnects and continues running the script, when the debugging client closes the connection

Deprecations

Fixed bug #2014: Drop support for PHP 7.2
Fixed bug #2102: Drop support for PHP 7.3
Fixed bug #2103: Drop support for PHP 7.4

Fixed bugs

Fixed bug #2002: xdebug_trace_handler_t handler members are not always checked for NULL when executing
Fixed bug #2045: Inapproriate frowny face
Fixed bug #2089: Alpine Linux does not support res_ninit
Fixed bug #2093: Fatal error: linux/rtnetlink.h: No such file or directory linux/rtnetlink.h
Fixed bug #2098: With breakpoint_include_return_value enabled step_out break at every function
Fixed bug #2105: 3.2.0alpha1 package misses the php-header.h file
Fixed bug #2108: Segfault on PHP8.1 with PHPUnit 10 when path coverage is enabled
Fixed bug #2112: Force 'return_value' breakpoint information and step to 'on' temporarily
Fixed bug #2113: Crash at step_into after thrown exception with return value debugging en
Fixed bug #2121: Xdebug does not use local independent float-to-string functions
Fixed bug #2124: Xdebug incorrectly reports that there are no children for static closure properties, even thought there are
Fixed bug #2125: Crash with PHP 8.2 on 32-bit due to change in "not set" value with CATCH opcode
Fixed bug #2126: Problems with retrieving global variables
Fixed bug #2127: Tracing does not handle NUL char in anonymous closure scope
Fixed bug #2133: Warning with regards to extra NUL character in xdebug_setcookie call
Fixed bug #2134: Xdebug stops at the line where the exception is created, not where it is thrown
Fixed bug #2135: Xdebug stops twice at the same line after a call breakpoint or xdebug_break()
[2022-11-10] — Xdebug 3.2.0RC2

Fixed bugs

Fixed bug #2100: "Fatal error: debuginfo() must return an array" when Exception is thrown from debugInfo in PHP 8.x
Fixed bug #2101: When a temporary breakpoint is hit, breakpoint_list should show it as disabled
Fixed bug #2126: Problems with retrieving global variables
Fixed bug #2127: Tracing does not handle NUL char in anonymous closure scope
Fixed bug #2129: Cannot read snapshot Gzip-compressed data is corrupt
Fixed bug #2133: Warning with regards to extra NUL character in xdebug_setcookie call
Fixed bug #2134: Xdebug stops at the line where the exception is created, not where it is thrown
Fixed bug #2135: Xdebug stops twice at the same line after a call breakpoint or xdebug_break()
Fixed bug #2136: Duplicate line/conditional breakpoints are not rejected
[2022-11-08] — Xdebug 3.1.6

Fixed bugs

Fixed bug #2100: "Fatal error: debuginfo() must return an array" when Exception is thrown from debugInfo in PHP 8.x
Fixed bug #2101: When a temporary breakpoint is hit, breakpoint_list should show it as disabled
Fixed bug #2129: Cannot read snapshot Gzip-compressed data is corrupt
[2022-10-10] — Xdebug 3.2.0RC1

Fixed bugs

Fixed bug #2113: Crash at step_into after thrown exception with return value debugging en
Fixed bug #2117: Removed emulated properties for closures, as PHP 8.2 adds debug information for them
Fixed bug #2121: Xdebug does not use local independent float-to-string functions
Fixed bug #2122: Local variables are not available when using start_upon_error
Fixed bug #2123: Add warning in log and diagnositics information when a breakpoint is set on a non-existing file
Fixed bug #2124: Xdebug incorrectly reports that there are no children for static closure properties, even thought there are
Fixed bug #2125: Crash with PHP 8.2 on 32-bit due to change in "not set" value with CATCH opcode
[2022-08-24] — Xdebug 3.2.0alpha3

Improvements

Fixed bug #2112: Force 'return_value' breakpoint information and step to 'on' temporarily
[2022-07-25] — Xdebug 3.2.0alpha2

Fixed bugs

Fixed bug #2105: 3.2.0alpha1 package misses the php-header.h file
[2022-07-20] — Xdebug 3.2.0alpha1

New Features

Fixed bug #1819: Allow a list of headers in 'xdebug.client_discovery_header'
Fixed bug #2079: Add pseudo hosts xdebug://gateway and xdebug://nameserver
Fixed bug #2087: Introduce step for the return state and virtual property for return value
Fixed bug #2104: Add support for PHP 8.2 "SensitiveParameter" attribute

Improvements

Fixed bug #2086: Include return value in return breakpoint interruption response

Removed features

Fixed bug #2014: Drop support for PHP 7.2
Fixed bug #2102: Drop support for PHP 7.3
Fixed bug #2103: Drop support for PHP 7.4

Fixed bugs

Fixed bug #2002: xdebug_trace_handler_t handler members are not always checked for NULL when executing
Fixed bug #2045: Inapproriate frowny face
Fixed bug #2062: Profiler can't able to write cachegrind file at /tmp
Fixed bug #2089: Alpine Linux does not support res_ninit
Fixed bug #2093: Fatal error: linux/rtnetlink.h: No such file or directory linux/rtnetlink.h
Fixed bug #2098: With breakpoint_include_return_value enabled step_out break at every function
[2022-06-06] — Xdebug 3.1.5

Fixed bugs

Fixed bug #2056: Install documentation gives wrong arch for installation on M1 Macs
Fixed bug #2082: phpize --clean removes required clocks.m4 file
Fixed bug #2083: Constant defined with an enum case produce double "facet" attribute in context_get response
Fixed bug #2085: Crash when used with source guardian encoded files
Fixed bug #2090: Segfault in __callStatic() after FFI initialization
[2022-04-04] — Xdebug 3.1.4

Fixed bugs

Fixed bug #2006: Removing second call breakpoint with same function name
Fixed bug #2060: XDebug breaks the Symfony "PhpFilesAdapter" cache adapter
Fixed bug #2061: Possible use after free with GC Stats
Fixed bug #2063: Can't inspect ArrayObject storage elements
Fixed bug #2064: Segmentation fault in symfony cache
Fixed bug #2068: Debug session can be started with "XDEBUG_SESSION_START=anything" when xdebug.trigger_value is set
Fixed bug #2069: Warn when profiler_append is used together with zlib compression
Fixed bug #2075: Code coverage misses static array assignment lines
[2022-02-01] — Xdebug 3.1.3

Fixed bugs

Fixed bug #2049: evaling broken code (still) causes unhandled exception in PHP 7.4
Fixed bug #2052: Memory leak when a trace file can't be opened because xdebug.trace_output_name is invalid
Fixed bug #2054: Slowdown when calling a function with long string parameters
Fixed bug #2055: Debugger creates XML with double facet attribute
[2021-12-01] — Xdebug 3.1.2

Fixed bugs

Fixed bug #2036: Segfault on fiber switch in finally block in garbage collected fiber
Fixed bug #2037: Crash when profile file can not be created
Fixed bug #2041: __debugInfo is not used for var_dump output
Fixed bug #2046: Segault on xdebug_get_function_stack inside a Fiber
[2021-10-15] — Xdebug 3.1.1

Fixed bugs

Fixed bug #2016: apache gives no output with xdebug 3.1.0b2 installed
Fixed bug #2024: Apache restarts in a loop under PHP 8.1.0 RC3
Fixed bug #2029: incorrect and inaccurate date and time displayed in xdebug.log and trace files
Fixed bug #2030: PhpStorm step-debug not working on PHP 8.0.11
Fixed bug #2032: Use runtime PHP version in DBGp and info pages instead of compiled-against version
Fixed bug #2034: Xdebug throws a Segmentation fault when 'set_time_limit' function is disabled
Fixed bug #2035: Xdebug block everything with localhost in XAMMP
[2021-10-04] — Xdebug 3.1.0

Fixed bugs

Fixed bug #1472: Add assignments to computer readable trace format
Fixed bug #1537: Add links to documentation to various different "features" after wizard has run
Fixed bug #1738: Add xdebug_notify() function to send data through DBGp to a debugging client
Fixed bug #1853: Enable profile compression for cachegrind files
Fixed bug #1890: Add connected client and protocol features to diagnostic page
Fixed bug #1898: API for querying the currently active mode(s)
Fixed bug #1933: Allow for cloud ID to be set through the trigger
Fixed bug #1938: Branches in traits aren’t marked as executed
Fixed bug #1948: Do not redirect warning and error messages to PHP's error log if an Xdebug log is active
Fixed bug #1949: private properties for internal classes can't be fetched for debugging
Fixed bug #1963: php exit code = -1073741819 when xdebug.mode = off (Windows Thread Safe Only)
Fixed bug #1969: Provide breakpoint ID / info in DBGp run command responses
Fixed bug #1970: xdebug_get_function_stack with unnamed (internal) parameters have wrong index
Fixed bug #1972: Add support for PHP 8.1 Fibers
Fixed bug #1974: Add gzip support to trace files
Fixed bug #1976: Switch debug session cookie to Lax, and remove expiry time
Fixed bug #1978: Xdebug's log messages are cut off at 512 bytes
Fixed bug #1980: PHP 8.1: Mark enum classes as "enum"
Fixed bug #1986: Add support for multiple trigger values
Fixed bug #1989: Profiling does not output correct class when parent keyword is used
Fixed bug #1992: Code Coverage with filter produces Segmentation fault on xdebug_stop_code_coverage()
Fixed bug #1993: eval-ing broken code causes stepping to break
Fixed bug #1996: Add support for Closure visualisation in traces, debugging, and Xdebug's var_dump
Fixed bug #1997: Added xdebug_connect_to_client() to attempt a debugging connect while running code
Fixed bug #1998: Double facet attribute generated for enums that are stored in properties
Fixed bug #1999: Add "readonly" facet to PHP 8.1 readonly properties
Fixed bug #2001: Add 'xdebug.use_compression' setting to turn on/off compression for profiling files
Fixed bug #2004: Figure out what "XDEBUG_SHOW_FNAME_TODO" define is for
Fixed bug #2007: xdebug 3.x fails to build on OS X 10.11 or earlier due to clock_gettime_nsec_np requirement
Fixed bug #2008: Using the XDEBUG_SESSION cookie could bypass shared-secret checks
Fixed bug #2009: xdebug_stop_code_coverage's argument has type mismatch
Fixed bug #2011: Closures as protected properties have double facet XML attribute
Fixed bug #2013: Support PHP 8.1
Fixed bug #2018: zlib compression support on Windows
Fixed bug #2019: Xdebug crash because of uninitialized memory
Fixed bug #2020: segfault if xdebug.dump.GET=* and integer key without value in URL
Fixed bug #2021: Segmentation fault due to NULL bytes in internal anonymous class names
Fixed bug #2025: Anonymous classes which extend are not detected as anonymous classes since PHP 8.0
[2021-09-07] — Xdebug 3.1.0beta2

Fixed bugs

Fixed a packaging bug that prevented compilation on PHP 7.2 and PHP 8.1
[2021-09-05] — Xdebug 3.1.0beta1

New features

Fixed bug #1738: Add xdebug_notify() function to send data through DBGp to a debugging client
Fixed bug #1853: Enable profile compression for cachegrind files
Fixed bug #1898: API for querying the currently active mode(s)
Fixed bug #1972: Add support for PHP 8.1 Fibers
Fixed bug #1974: Add gzip support to trace files
Fixed bug #1997: Added xdebug_connect_to_client() to attempt a debugging connect while running code
Fixed bug #2001: Add 'xdebug.use_compression' setting to turn on/off compression for profiling files
Fixed bug #2013: Support PHP 8.1

Improvements

Fixed bug #1472: Add assignments to computer readable trace format
Fixed bug #1890: Add connected client and protocol features to diagnostic page
Fixed bug #1933: Allow for cloud ID to be set through the trigger
Fixed bug #1969: Provide breakpoint ID / info in DBGp run command responses
Fixed bug #1976: Switch debug session cookie to Lax, and remove expiry time
Fixed bug #1980: PHP 8.1: Mark enum classes as "enum"
Fixed bug #1986: Add support for multiple trigger values
Fixed bug #1996: Add support for Closure visualisation in traces, debugging, and Xdebug's var_dump
Fixed bug #1999: Add "readonly" facet to PHP 8.1 readonly properties

Fixed bugs

Fixed bug #1938: Branches in traits aren’t marked as executed
Fixed bug #1948: Do not redirect warning and error messages to PHP's error log if an Xdebug log is active
Fixed bug #1949: private properties for internal classes can't be fetched for debugging
Fixed bug #1963: php exit code = -1073741819 when xdebug.mode = off (Windows Thread Safe Only)
Fixed bug #1970: xdebug_get_function_stack with unnamed (internal) parameters have wrong index
Fixed bug #1978: Xdebug's log messages are cut off at 512 bytes
Fixed bug #1989: Profiling does not output correct class when parent keyword is used
Fixed bug #1992: Code Coverage with filter produces Segmentation fault on xdebug_stop_code_coverage()
Fixed bug #1993: eval-ing broken code causes stepping to break
Fixed bug #1998: Double facet attribute generated for enums that are stored in properties
Fixed bug #2004: Figure out what "XDEBUG_SHOW_FNAME_TODO" define is for
Fixed bug #2008: Using the XDEBUG_SESSION cookie could bypass shared-secret checks
Fixed bug #2009: xdebug_stop_code_coverage's argument has type mismatch
Fixed bug #2011: Closures as protected properties have double facet XML attribute

Documentation

Fixed bug #1537: Add links to documentation to various different "features" after wizard has run
[2021-04-08] — Xdebug 3.0.4

Fixed bugs

Fixed bug #1802: Improve xdebug.org home page
Fixed bug #1944: tracing is started without trigger, when profiler is also enabled
Fixed bug #1947: xdebug_info() settings section does not show the modes that are overridden by XDEBUG_MODE
Fixed bug #1950: Assignment trace with ASSIGN_OBJ_REF crashes
Fixed bug #1954: Calling xdebug_start_trace without mode including tracing results in a fatal error
[2021-02-22] — Xdebug 3.0.3

Fixed bugs

Fixed bug #1930: No local variables with trigger and xdebug_break()
Fixed bug #1931: xdebug_info() output misses configuration settings if phpinfo() has been called
Fixed bug #1932: One line in multi-line string concatenation is not covered
Fixed bug #1940: Wrong type used for showing GC Stats reports
[2021-01-04] — Xdebug 3.0.2

Fixed bugs

Fixed bug #1907: Empty exception message when setting the $message property to a stringable object
Fixed bug #1910: Code coverage misses constructor property promotion code
Fixed bug #1914: Compillation failure on OpenBSD
Fixed bug #1915: Debugger should only start with XDEBUG_SESSION and not XDEBUG_PROFILE
Fixed bug #1918: Warn if PHP's Garbage Collection is disabled in gc_stats mode
Fixed bug #1919: Crash when enabling filter without the right mode active
Fixed bug #1921: Xdebug does not start step debugging if start_with_request=trigger
Fixed bug #1922: Code coverage misses array assignment lines
Fixed bug #1924: Deprecated INI settings displayed in phpinfo()
Fixed bug #1925: xdebug.start_with_request and start_upon_error display inconsistent values
Fixed bug #1926: Add Xdebug mode's source to xdebug_info() output
Fixed bug #1927: Crash when calling xdebug_stop_trace without a trace in progress
Fixed bug #1928: xdebug_stop_gcstats() can also return false
[2020-12-04] — Xdebug 3.0.1

Fixed bugs

Fixed bug #1893: Crash with ext-fiber and xdebug.mode=coverage
Fixed bug #1896: Segfault with closures that are not created from user code
Fixed bug #1897: Crash when removing a breakpoint
Fixed bug #1900: Update README and add run-xdebug-tests.php to package
Fixed bug #1901: Stack traces are shown (with a broken time) when Xdebug's mode includes 'debug' but not 'develop' or 'trace'
Fixed bug #1902: Compillation failure on AIX
Fixed bug #1903: Constants should always be available, regardless of which mode Xdebug is in
Fixed bug #1904: Profile and trace files using %t or %u do not get the right names
Fixed bug #1905: Debugger does not disable request timeouts
[2020-11-25] — Xdebug 3.0.0

Xdebug 3 includes major changes in functionality compared to Xdebug 2. The primary way how you turn on functionality is through the new xdebug.mode PHP configuration setting. This made it possible to massively increase performance in many of Xdebug's sub systems as Xdebug is now much more conservative in which hooks are enabled.

Configuration changes, massive performance improvements, and PHP 8 support are the primary features in Xdebug 3, but there is much more. The Upgrade Guide lists the changes in great detail, please read it.

New features

Implemented issue #1762: Introduce feature modes
Implemented issue #1793: Add xdebug.start_upon_error setting to cover the removed xdebug.remote_mode=jit feature.
Implemented issue #1797: Implement generic logging
Implemented issue #1801: Rename mode 'display' to mode 'develop'
Implemented issue #1831: Add diagnostics function xdebug_info()
Implemented issue #1833: Add links to documentation in diagnostic log
Implemented issue #1837: Support for associative variadic variable names (PHP 8)
Implemented issue #1841: Add support for PHP 8 'match' keyword

Improvements

Implemented issue #1680: Update var dumping routines to include relevant information for interned strings and immutable arrays
Implemented issue #1712: Add unit to profiler data types
Implemented issue #1743: Figuring out whether a call is a closure uses string comparisions instead of checking the ACC flag (Benjamin Eberlei)
Implemented issue #1752: Use a stack pool to manage stack entries instead of allocating and deallocating entries
Implemented issue #1755: Overload pcntl_fork() to prevent performance degradation by calling xdebug_get_pid often (Carlos Granados)
Implemented issue #1781: Include 'Xdebug' in max nesting level error message
Implemented issue #1783: Stacktrace needs vertical scrolling on small screens (Tobias Tom)
Implemented issue #1789: Provide PHP stubs for Xdebug's functions
Implemented issue #1807: Document Xdebug installation with yum and apt
Implemented issue #1813: Make sure that the xdebug_init_*_globals don't do more than they need to, and that init is only done when xdebug.mode != off
Implemented issue #1817: Switch filename storage from char*/size_t to zend_string*
Implemented issue #1818: Switch variable storage from char*/size_t to zend_string*
Implemented issue #1820: Increase time tracing precision (Michael Voříšek)
Implemented issue #1824: Allow Xdebug's mode to be set through an environment variable
Implemented issue #1825: Improve profiler performance by not calling fflush after every function (Michael Voříšek)
Implemented issue #1826: Reduce profiler memory allocation and call overhead
Implemented issue #1829: Switch to 10ns profiler resolution (Michael Voříšek)
Implemented issue #1832: If connect back host can not be contacted, fallback to remote_host/port
Implemented issue #1858: Only open/close log if there is an actual message to log
Implemented issue #1860: Allow xdebug.cloud_id to be set through an environment variable
Implemented issue #1814: Don't obtain the current time when it's not needed
Implemented issue #1835: Add current trace and profile file name, to diagnostic page
Implemented issue #1885: Change xdebug.start_with_ settings to PHP_INI_SYSTEM|PHP_INI_PERDIR
Implemented issue #1889: max_nesting_level should only trigger in "develop" mode

Removed features

Implemented issue #1795: Deprecate PHP 7.1 support
Implemented issue #1786: Remove idekey value fallback to USER/USERNAME environment variable
Implemented issue #1809: Remove "overload_var_dump" setting
Implemented issue #1810: Remove collect_vars and xdebug_get_declared_vars()
Implemented issue #1812: Remove show_mem_delta setting
Implemented issue #1838: Remove collect_params setting, and always default it to "4"
Implemented issue #1847: Remove xdebug.remote_cookie_expire_time setting
Implemented issue #1016: Removed support for pause-execution (introduced in beta1)
Implemented issue #1868: Remove xdebug_disable and xdebug_enabled
Implemented issue #1883: Function xdebug_is_enabled has been removed

Changes

Implemented issue #1378: Unfortunate coupling of default_enable=1 and remote_mode=jit
Implemented issue #1773: Replace all xdebug.*_output_dir settings with xdebug.output_dir
Implemented issue #1785: Replace xdebug.remote_mode and xdebug.auto_trace with generic "start-with-request" setting
Implemented issue #1791: Replace xdebug.*trigger*, xdebug.*trigger_value*, with xdebug.start_with_request=trigger and xdebug.trigger_value
Implemented issue #1792: Change start_with_request=always/never to start_with_request=yes/no
Implemented issue #1794: Replace the filter's blacklist/whitelist with exclude/include
Implemented issue #1811: Remove xdebug.collect_includes setting and always include them
Implemented issue #1843: Adjust XDEBUG_CONFIG checks, and document what can be set through it
Implemented issue #1844: Add deprecation warning for removed and renamed configuration setting names
Implemented issue #1845: Rename xdebug.remote_{host,port} to xdebug.client_{host,port}
Implemented issue #1846: Rename setting xdebug.remote_timeout to xdebug.connect_timeout_ms
Implemented issue #1848: Change default Xdebug port from 9000 to 9003
Implemented issue #1850: Change array variable output in tracing to use modern [] syntax
Implemented issue #1856: Rename xdebug.remote_connect_back to xdebug.discover_client_host
Implemented issue #1857: Rename xdebug.remote_addr_header to xdebug.client_discovery_header

Fixed bugs

Fixed bug #1608: XDEBUG_CONFIG env var make sessions automatically START ever (at least send the XDEBUG_SESSION cookie)
Fixed bug #1726: Memory leaks spotted in various places in typical error code paths
Fixed bug #1757: Pause-execution feature degrades performance
Fixed bug #1864: Incompatibility with PCS and protobuf extensions
Fixed bug #1870: XDEBUG_SESSION_START URL parameter does not override XDEBUG_SESSION cookie
Fixed bug #1871: The "idekey" is not set when debugging is started through XDEBUG_SESSION cookie
Fixed bug #1873: xdebug_info() segfaults if the diagnostic buffer is empty
Fixed bug #1874: Incompatibility with protobuf extension
Fixed bug #1875: Overflow with large amounts of elements for variadics
Fixed bug #1878: Compilation failure: Socket options TCP_KEEPCNT and TCP_KEEPINTVL do not exist on Solaris 10 Sparc
Fixed bug #1880: Bundled unit test tests/debugger/bug00886.phar misses to load phar extension
Fixed bug #1887: Crash bug with xdebug_call_class and xdebug_call_file
Fixed bug #1756: Php process won't exit after running connected to a client
Fixed bug #1823: Profiler generates negative data for memory usage
Fixed bug #1834: Return type must be bool in overloaded set_time_limit
Fixed bug #1888: Make headers sticky in xdebug_info() output

Documentation

Fixed bug #1865: Document XDEBUG_TRIGGER environment variable
Fixed bug #1866: Document comma separated xdebug.mode values
Fixed bug #1884: Document where Xdebug's settings can be set
Fixed bug #1892: Document changed/removed ini settings in the upgrade guide with the links provided
[2020-11-16] — Xdebug 3.0.0RC1

This is a BETA release, and not ready for production environments. It adds support for PHP 8.0, and drops support for PHP 7.1.

Xdebug 3 has many changes. Please read the Upgrade Guide.

Xdebug 3 documentation is available on a sub-domain.

Improvements

Implemented issue #1814: Don't obtain the current time when it's not needed
Implemented issue #1885: Change xdebug.start_with_ settings to PHP_INI_SYSTEM|PHP_INI_PERDIR

Removed features

Implemented issue #1016: Removed support for pause-execution (introduced in beta1)
Implemented issue #1868: Remove xdebug_disable and xdebug_enabled
Implemented issue #1883: Function xdebug_is_enabled has been removed

Fixed bugs

Fixed bug #1608: XDEBUG_CONFIG env var make sessions automatically START ever (at least send the XDEBUG_SESSION cookie)
Fixed bug #1757: Pause-execution feature degrades performance
Fixed bug #1864: Incompatibility with PCS and protobuf extensions
Fixed bug #1870: XDEBUG_SESSION_START URL parameter does not override XDEBUG_SESSION cookie
Fixed bug #1871: The "idekey" is not set when debugging is started through XDEBUG_SESSION cookie
Fixed bug #1873: xdebug_info() segfaults if the diagnostic buffer is empty
Fixed bug #1874: Incompatibility with protobuf extension
Fixed bug #1875: Overflow with large amounts of elements for variadics
Fixed bug #1878: Compilation failure: Socket options TCP_KEEPCNT and TCP_KEEPINTVL do not exist on Solaris 10 Sparc
Fixed bug #1880: Bundled unit test tests/debugger/bug00886.phar misses to load phar extension
Fixed bug #1887: Crash bug with xdebug_call_class and xdebug_call_file

Documentation

Fixed issue #1865: Document XDEBUG_TRIGGER environment variable
Fixed issue #1866: Document comma separated xdebug.mode values
Fixed issue #1884: Document where Xdebug's settings can be set
[2020-10-14] — Xdebug 3.0.0beta1

This is a BETA release, and not ready for production environments. It adds support for PHP 8.0, and drops support for PHP 7.1.

Xdebug 3 has many changes. Please read the Upgrade Guide.

Xdebug 3 documentation is available on a sub-domain.

New features

Implemented issue #1762: Introduce feature modes
Implemented issue #1793: Add xdebug.start_upon_error setting to cover the removed xdebug.remote_mode=jit feature.
Implemented issue #1797: Implement generic logging
Implemented issue #1801: Rename mode 'display' to mode 'develop'
Implemented issue #1831: Add diagnostics function xdebug_info()
Implemented issue #1833: Add links to documentation in diagnostic log
Implemented issue #1837: Support for associative variadic variable names (PHP 8)
Implemented issue #1841: Add support for PHP 8 'match' keyword

Removed features

Implemented issue #1795: Deprecate PHP 7.1 support
Implemented issue #1786: Remove idekey value fallback to USER/USERNAME environment variable
Implemented issue #1809: Remove "overload_var_dump" setting
Implemented issue #1810: Remove collect_vars and xdebug_get_declared_vars()
Implemented issue #1812: Remove show_mem_delta setting
Implemented issue #1838: Remove collect_params setting, and always default it to "4"
Implemented issue #1847: Remove xdebug.remote_cookie_expire_time setting

Changes

Implemented issue #1378: Unfortunate coupling of default_enable=1 and remote_mode=jit
Implemented issue #1773: Replace all xdebug.*_output_dir settings with xdebug.output_dir
Implemented issue #1785: Replace xdebug.remote_mode and xdebug.auto_trace with generic "start-with-request" setting
Implemented issue #1791: Replace xdebug.*trigger*, xdebug.*trigger_value*, with xdebug.start_with_request=trigger and xdebug.trigger_value
Implemented issue #1792: Change start_with_request=always/never to start_with_request=yes/no
Implemented issue #1794: Replace the filter's blacklist/whitelist with exclude/include
Implemented issue #1811: Remove xdebug.collect_includes setting and always include them
Implemented issue #1844: Add deprecation warning for removed and renamed configuration setting names
Implemented issue #1845: Rename xdebug.remote_{host,port} to xdebug.client_{host,port}
Implemented issue #1846: Rename setting xdebug.remote_timeout to xdebug.connect_timeout_ms
Implemented issue #1848: Change default Xdebug port from 9000 to 9003
Implemented issue #1850: Change array variable output in tracing to use modern [] syntax
Implemented issue #1856: Rename xdebug.remote_connect_back to xdebug.discover_client_host
Implemented issue #1857: Rename xdebug.remote_addr_header to xdebug.client_discovery_header

Improvements

Implemented issue #1016: Support for pause-execution (Robert Lu)
Implemented issue #1680: Update var dumping routines to include relevant information for interned strings and immutable arrays
Implemented issue #1712: Add unit to profiler data types
Implemented issue #1743: Figuring out whether a call is a closure uses string comparisions instead of checking the ACC flag (Benjamin Eberlei)
Implemented issue #1752: Use a stack pool to manage stack entries instead of allocating and deallocating entries
Implemented issue #1755: Overload pcntl_fork() to prevent performance degradation by calling xdebug_get_pid often (Carlos Granados)
Implemented issue #1781: Include 'Xdebug' in max nesting level error message
Implemented issue #1783: Stacktrace needs vertical scrolling on small screens (Tobias Tom)
Implemented issue #1789: Provide PHP stubs for Xdebug's functions
Implemented issue #1807: Document Xdebug installation with yum and apt
Implemented issue #1813: Make sure that the xdebug_init_*_globals don't do more than they need to, and that init is only done when xdebug.mode != off
Implemented issue #1817: Switch filename storage from char*/size_t to zend_string*
Implemented issue #1818: Switch variable storage from char*/size_t to zend_string*
Implemented issue #1820: Increase time tracing precision (Michael Voříšek)
Implemented issue #1824: Allow Xdebug's mode to be set through an environment variable
Implemented issue #1825: Improve profiler performance by not calling fflush after every function (Michael Voříšek)
Implemented issue #1826: Reduce profiler memory allocation and call overhead
Implemented issue #1829: Switch to 10ns profiler resolution (Michael Voříšek)
Implemented issue #1832: If connect back host can not be contacted, fallback to remote_host/port
Implemented issue #1858: Only open/close log if there is an actual message to log
Implemented issue #1860: Allow xdebug.cloud_id to be set through an environment variable

Fixed bugs

Fixed bug #1756: Php process won't exit after running connected to a client
Fixed bug #1823: Profiler generates negative data for memory usage
Fixed bug #1834: Return type must be bool in overloaded set_time_limit
[2020-09-28] — Xdebug 2.9.8

Fixed bugs

Fixed bug #1851: Paths are not counted as coveraged with loops calling function
Fixed bug #1855: Build issues on FreeBSD
[2020-09-16] — Xdebug 2.9.7

Fixed bugs

Fixed bug #1839: Add keepalive options to debugging socket
[2020-05-29] — Xdebug 2.9.6

Fixed bugs

Fixed bug #1782: Cookie XDEBUG_SESSION will be soon rejected because it has the “sameSite” attribute set to none
Fixed bug #1787: Branch coverage data does not always follow the lines/functions format
Fixed bug #1790: Segfault in var_dump() or while debugging with protobuf extension
[2020-04-25] — Xdebug 2.9.5

Fixed bugs

Fixed bug #1772: Crash with exception thrown inside a destructor
Fixed bug #1775: Segfault when another extension compiles a PHP file during RINIT
Fixed bug #1779: Nested multi-line built-in function in namespace are not covered
[2020-03-23] — Xdebug 2.9.4

Fixed bugs

Fixed bug #1763: Crash while setting opcode overrides in ZTS mode.
Fixed bug #1766: Using the DBGp detach command disables remote debugging for the whole process.
[2020-03-13] — Xdebug 2.9.3

Fixed bugs

Fixed bug #1753: Resolved breakpoints use information from wrong files
Fixed bug #1758: Xdebug changes error_get_last results inside a try catch
Fixed bug #1759: User registered opcode handlers should call ones already set by other extensions
[2020-01-31] — Xdebug 2.9.2

Fixed bugs

Fixed bug #1735: DBGp eval warning promoted to Exception can cause out-of-sync responses
Fixed bug #1736: Segmentation fault when other extensions run PHP in RINIT
Fixed bug #1739: Tracing footer not written
[2020-01-16] — Xdebug 2.9.1

Fixed bugs

Fixed bug #1721: Header may not contain NUL bytes in Unknown on line 0
Fixed bug #1727: Debugger stops more often than expected due to resolving breakpoints
Fixed bug #1728: INIT_STATIC_METHOD_CALL is not overloaded
Fixed bug #1731: var_dump with DateTime does not output properties
Fixed bug #1733: SEND_VAR_NO_REF_EX opcode, used for require(), is not overloaded
Fixed bug #1734: Segfault with DBGp "source" with a out-of-range start line number
[2019-12-09] — Xdebug 2.9.0

Improvements

Fixed bug #1723: Class/function pre-analysis for code coverage speed improvements

Removed Features

Fixed bug #1301: Removed aggregated profiler feature
Fixed bug #1720: Remove superfluous xdebug.remote_handler setting

Fixed bugs

Fixed bug #1722: Build warning issues on FreeBSD
Fixed bug #1724: Missing property types and uninitialised values in variable dumping routines
[2019-12-02] — Xdebug 2.8.1

Fixed bugs

Fixed bug #1717: Code coverage turned slow after update from 2.7.2 to 2.8.0
[2019-10-31] — Xdebug 2.8.0

Fixed bugs

Fixed bug #1664: Segfault with garbage collection and complex function arguments
Fixed bug #1699: Crash during debugging Phalcon project
Fixed bug #1705: Crash while debugging with ionCube being used
Fixed bug #1708: Crash on evaluating object with properties
Fixed bug #1709: Wrong data type breaks tests on Big Endian build
Fixed bug #1713: INIT_FCALL is not overloaded in code coverage
[2019-08-26] — Xdebug 2.8.0beta2

Fixed bugs

Fixed bug #1540: Code coverage should not run when turned off in php.ini
Fixed bug #1573: Using an exception_handler creates an extra broken profiler file
Fixed bug #1589: function names used in auto_prepend_file missing from profile file
Fixed bug #1613: Wrong name displayed for Recoverable fatal error
Fixed bug #1652: Problems with detach in debugger init stage
Fixed bug #1676: Xdebug doesn't write trace footer for shutdown functions
Fixed bug #1689: Traces show return values and exit information for functions without entry information
Fixed bug #1691: Code Coverage misses fluent interface function call
Fixed bug #1698: Switch PHP 7.4 Windows builds back to VS17
Fixed bug #1700: Xdebug abuses possibilty immutable class flags
[2019-07-25] — Xdebug 2.8.0beta1

Fixed bugs

Fixed bug #1679: Code Coverage misses static property as function argument
Fixed bug #1682: Invalid NULL byte in debugger XML with anonymous classes
Fixed bug #1683: Xdebug does not compile due to changes to ASSIGN_ADD and friends operations in PHP 7.4alpha3
Fixed bug #1687: Use appropriate process ID for logging and "right process" tracking
Fixed bug #1688: Improve performance by using getpid() only when step debugger is active
[2019-06-28] — Xdebug 2.8.0alpha1

Added features

Implemented issue #1599: Add support for PHP 7.4

Improvements

Implemented issue #1388: Support 'resolved' flag for breakpoints
Implemented issue #1664: Run breakpoint resolver when after a new breakpoint is added as well

Fixed bugs

Fixed bug #1660: Return breakpoints for methods don't break immediately

Removed features

Fixed bug #1666: Remove xdebug.extended_info setting
[2019-05-06] — Xdebug 2.7.2

Fixed Bugs

Fixed bug #1488: Rewrite DBGp 'property_set' to always use eval
Fixed bug #1586: error_reporting()'s return value is incorrect during debugger's 'eval' command
Fixed bug #1615: Turn off Zend OPcache when remote debugger is turned on
Fixed bug #1656: remote_connect_back alters header if multiple values are present
Fixed bug #1662: __debugInfo should not be used for user-defined classes
[2019-04-05] — Xdebug 2.7.1

Fixed Bugs

Fixed bug #1646: Missing newline in error message
Fixed bug #1647: Memory corruption when a conditional breakpoint is used
Fixed bug #1641: Perfomance degradation with getpid syscall (Kees Hoekzema)
[2019-03-06] — Xdebug 2.7.0

Fixed Bugs

Fixed bug #1520: Xdebug does not handle variables and properties with "-" in their name
Fixed bug #1577: Code coverage path analysis with chained catch fails in PHP 7.3
Fixed bug #1639: Compile warning/error on GCC 8 or Clang due to "break intentionally missing"
Fixed bug #1642: Debugger gives: "Warning: Header may not contain NUL bytes"
[2019-02-15] — Xdebug 2.7.0RC2

Fixed Bugs

Fixed bug #1551: Property with value null is not represented well
Fixed bug #1621: Xdebug fails to compile cleanly on 32-bit platforms
Fixed bug #1625: Work around ABI conflicts in PHP 7.3.0/PHP 7.3.1
Fixed bug #1628: The PHP function name being constructed to record when GC Collection runs, is not freed
Fixed bug #1629: SOAP Client/Server detection code does not handle inherited classes
[2019-02-01] — Xdebug 2.7.0rc1

Fixed Bugs

Fixed bug #1571: File/line information is not shown for closures in namespaces.
Fixed bug #1578: Compile error due to redefinition of "zif_handler" with old GCCs.
Fixed bug #1583: Xdebug crashes when OPcache's compact literals optimisation is on.
Fixed bug #1598: Make path/branch coverage work with OPcache loaded for PHP 7.3 and later.
Fixed bug #1620: Division by zero when GC Stats Collection runs with memory manager disabled.
[2018-09-20] — Xdebug 2.7.0beta1

Improvements

Fixed bug #1519: PHP 7.3 support (with a contribution by Christoph M. Becker)
[2018-08-01] — Xdebug 2.6.1

Fixed bugs

Fixed bug #1525: Namespace filter does equality match instead of prefix match
Fixed bug #1532: SIGABRT when using remote debugging and an error is thrown in eval() (Philip Hofstetter)
Fixed bug #1543: Various memory leaks due to changes in (internal) string handling
Fixed bug #1556: Crash when register_shutdown_function() is called with a function named call_user_func*
Fixed bug #1557: Remove 'return' in void xdebug_build_fname
Fixed bug #1568: Can't debug object properties that have numeric keys

Improvements

Fixed bug #1487: Re-enable IPv6 test on Travis
[2018-04-01] — Xdebug 2.7.0alpha1

Improvements

Fixed bug #938: Support remote debugging for PHP scripts that fork. (Sponsored by Brad Wilson)
Fixed bug #1487: Re-enable IPv6 test on Travis.

Fixed bugs

Fixed bug #1526: Namespace filter does equality match instead of prefix match.
Fixed bug #1532: SIGABRT when using remote debugging and an error is thrown in eval().
Fixed bug #1543: Various memory leaks due to changes in (internal) string handling.
[2018-01-29] — Xdebug 2.6.0

Fixed bugs

Fixed bug #1522: Remote debugging test failures on s390 (Big Endian).
[2018-01-23] — Xdebug 2.6.0RC2

Fixed bugs

Fixed bug #1521: xdebug_gc_stats.* missing from 2.6.0RC1 tarball.
[2018-01-22] — Xdebug 2.6.0RC1

Added features

Fixed bug #1506: Add garbage collection statistics feature (Benjamin Eberlei).
Fixed bug #1507: Add functions to access Zend Engine garbage collection metrics (Benjamin Eberlei).

Improvements

Fixed bug #1510: Change switch/case "break intentionally missing" comments to use GCC 7's new "fallthrough" attribute.
Fixed bug #1511: Detect and use compiler flags through new configure option.

Fixed bugs

Fixed bug #1335: Debugging with PhpStorm sometimes gives "can not get property".
Fixed bug #1454: Invalid memory read or segfaults from a __call() method.
Fixed bug #1508: Code coverage filter not checked in xdebug_common_assign_dim handler.
Fixed bug #1509: Code coverage missing for case inside switch with PHP 7.2.
Fixed bug #1512: Xdebug does not properly encode and escape properties with quotes and \0 characters.
Fixed bug #1514: Variable names with a NULL char are cut off at NULL char.
Fixed bug #1515: Object property names with a NULL char are cut off at NULL char.
Fixed bug #1516: Can't fetch variables or object properties which have \0 characters in them.
Fixed bug #1517: Notifications incorrectly specify the error type in "type_string" instead of "type".
[2017-12-28] — Xdebug 2.6.0beta1

Added features

Fixed bug #1059: Add filter capabilities to tracing, stack traces, and code coverage.
Fixed bug #1437: Add X-Profile-File-Name header when a profile file has been generated.

Improvements

Fixed bug #1493: Run test suite in AppVeyor for Windows CI.
Fixed bug #1498: Use new ZEND_EXTENSION API in config.w32 build scripts. (Kalle)

Fixed bugs

Fixed bug #702: Check whether variables tracing also works with =&.
Fixed bug #1501: Xdebug var dump tries casting properties.
Fixed bug #1502: SEND_REF lines are not marked as covered.
[2017-12-02] — Xdebug 2.6.0alpha1

Added features

Implemented bug #474: Added "memory" output to profiling files, to find out where memory is allocated.
Implemented bug #575: Dump super globals contents to error log upon errors, just like when this would happen for stack traces.
Implemented bug #964: Parse X-Forwarded-For for the first IP address when selecting the remote_connect_back host (Steve Easley).
Implemented bug #990: Add DBGp: notifications for notices and warnings to be shown in IDEs.
Implemented bug #1312: Implement extended_properties feature to remote debugging to support names and values with low ASCII values.
Implemented bug #1323: Added xdebug.filename_format setting to configure the formatting of filenames when tracing.
Implemented bug #1379: Added support for Unix domain sockets to xdebug.remote_host (Sara Golemon).
Implemented bug #1380: Added xdebug_is_debugger_active() that returns true when debugger is connected.
Implemented bug #1391: Added support for earlier stack frames through new argument for xdebug_call_* functions.
Implemented bug #1420: Handle PHP 7.2's new methods for switch/case
Implemented bug #1470: Added xdebug.remote_timeout to make connect timeout configurable.
Implemented bug #1495: Make var_dump() also use the new xdebug.filename_format when formatting filenames.

Improvements

Implemented bug #847: Added support for "%s" specifier for xdebug.trace_output_name.
Implemented bug #1384: Compile warning on Ubuntu 16.04 with GCC 5.4.x.
Implemented bug #1401: Improved error message in case the connection breaks.
Implemented bug #1430: Change DBGp tests to use TEST_PHP_EXECUTABLE instead of hard coded 'php'
Implemented bug #1484: Use FD_CLOEXEC with debugging sockets to prevent FDs from leaking to forked processes (Chris Wright).
Improve the foldexpr in xt.vim to fold lines correctly (Donie Leigh).

Fixed bugs

Fixed bug #1272: property_get doesn't return @attributes for SimpleXMLElement.
Fixed bug #1305: Property names with quotes can not be fetch while debugging.
Fixed bug #1431: Fix "use after free" with in add_name_attribute_or_element.
Fixed bug #1432: Fixed memory leak with xdebug_path_info_dtor.
Fixed bug #1449: Debugging breaks with array element keys containing low-ASCII variables.
Fixed bug #1471: Tracing crashes with return_assignments and ternairy operator.
Fixed bug #1474: Crashes due to variable resolving/reading mechanism not taking care of temporary hash tables correctly (Nikita Popov, Derick).
Fixed bug #1481: Fixed s390x and ppc64 builds (Remi Collet).
Fixed bug #1486: Crash on ZEND_SWITCH_LONG / ZEND_SWITCH_STRING with more than 32 cases.
Fixed bug #1496: Rewrite README.rst to be more clear on how to install and build Xdebug.

Changes

Fixed bug #1411: Use Error (Throwable) instead of fatal error when maximum nesting level is reached.

Removed features

Implemented bug #1377: Drop support for PHP 5.5 and 5.6, only PHP 7 is now supported
[2017-06-21] — Xdebug 2.5.5

Fixed bugs

Fixed bug #1439: TYPE_CHECK needs overloading due to smart branches
Fixed bug #1444: Code Coverage misses a variable in a multi-line function call
Fixed bug #1446: Code Coverage misses elseif if it uses an isset with a property
[2017-05-15] — Xdebug 2.5.4

Fixed bugs

Fixed bug #799: Function traces report base class instead of object name
Fixed bug #1421: Fix set_time_limit hanging on PHP 5.6 when pcntl_exec does not exist (Frode E. Moe)
Fixed bug #1429: Code coverage does not cover null coalesce
Fixed bug #1434: Code coverage segfaults on 32-bit arch
[2017-04-18] — Xdebug 2.5.3

Fixed bugs

Fixed bug #1421: Xdebug crashes when it is loaded without pcntl being present
[2017-04-17] — Xdebug 2.5.2

Fixed bugs

Fixed bug #701: Functions as array indexes show ??? in trace
Fixed bug #1403: Code coverage does not cover BIND_STATIC
Fixed bug #1404: Execution time is calculated incorrectly
Fixed bug #1413: Code coverage mishap with PHP 7.1.3
Fixed bug #1414: Missing variable assignment in traces with OPcache loaded
Fixed bug #1415: Crash with multiple catch constructs with OPcache loaded
Fixed bug #1416: Trace files should not include the first result of a generator if it hasn't started yet
Fixed bug #1417: Fetching properties of static class contexts fails due to incorrect fetch mode
Fixed bug #1419: Summary not written when script ended with "pcntl_exec()"
[2017-02-26] — Xdebug 2.5.1

Fixed bugs

Fixed bug #1057: Add xdebug.ini of all settings to package
Fixed bug #1165: DBGp: step_out skips subsequent function calls
Fixed bug #1180: Code coverage crashes with non-standard start/stops
Fixed bug #1278: Xdebug with PHP 7 does not handle prefill-from-oparray for XDEBUG_CC_UNUSED
Fixed bug #1300: Xdebug functions are not exposing their signature to Reflection
Fixed bug #1313: Arguments to __call() trampoline picked from the wrong memory location
Fixed bug #1329: While printing out a stack with and function parameters, Xdebug reads uninitialized zvals or free()d memory
Fixed bug #1381: Code Coverage misses line due to missing FETCH_DIM_W overload
Fixed bug #1385: can not fetch IS_INDIRECT properties
Fixed bug #1386: Executable code not shown as executed/executable
Fixed bug #1392: Unable to compile on FreeBSD due to missing struct definition
Fixed bug #1394: Code coverage does not cover instanceof (in elseif)
[2016-12-04] — Xdebug 2.5.0

Improvements

Implemented bug #1232: add memory delta to HTML traces
Implemented bug #1365: Allow remote_connect_back to be set through XDEBUG_CONFIG

Fixed bugs

Fixed bug #1168: Added defensive check to prevent infinite loop
Fixed bug #1242: Xdebug on Windows with Eclipse has issues with breakpoint IDs
Fixed bug #1343: Wrong values of numerical keys outside 32bit range
Fixed bug #1357: Function signature using variadics is reported as being not executed
Fixed bug #1361: Remote debugging connection issues with Windows (Anatol Belski)
Fixed bug #1373: Crash in zend_hash_apply_with_arguments when debugging, due to unset symbol table
[2016-11-12] — Xdebug 2.5.0RC1

Improvements

Implemented bug #998: Added support for IPv6 (Thomas Vanhaniemi)
Implemented bug #1297: Initial PHP 7.1 support

Fixed bugs

Fixed bug #1295: Apache crashes (SIGSEGV) when trying to establish connection when sockfd is large
Fixed bug #1303: POLLRDHUP is not supported outside of Gnu/Linux
Fixed bug #1331: Segfault in code coverage

Removed features

Support for PHP versions lower than PHP 5.5 has been dropped
[2016-08-02] — Xdebug 2.4.1

Fixed bugs

Fixed bug #1106: A thrown Exception after a class with __debugInfo gives 2 errors
Fixed bug #1241: FAST_CALL/FAST_RET take #2
Fixed bug #1246: Path and branch coverage should be initialised per request, not globally
Fixed bug #1263: Code coverage segmentation fault with opcache enabled
Fixed bug #1277: Crash when using a userland function from RSHUTDOWN with profiling enabled
Fixed bug #1282: var_dump() of integers > 32 bit is broken on Windows
Fixed bug #1288: Segfault when uncaught exception message does not contain " in "
Fixed bug #1291: Debugclient installation fails on Mac OS X
Fixed bug #1326: Tracing and generators crashes with PHP 7.x.
Fixed bug #1333: Profiler accesses memory structures after freeing
[2016-03-03] — Xdebug 2.4.0

Fixed bugs

Fixed bug #1258: Case in PHP 7.0 and code coverage
Fixed bug #1261: segmentation fault in xdebug.so with PHP 7.0 version of 'pkgtools' due to spl_autoload()
Fixed bug #1262: overload_var_dump=0 messes with xdebug_var_dump()
Fixed bug #1266: xdebug_dump_superglobals() always dumps empty stack on PHP 7
Fixed bug #1267: AIX build issues
Fixed bug #1270: String parsing marked not covered with PHP 7
[2016-01-25] — Xdebug 2.4.0RC4

Fixed bugs

Fixed bug #1220: Segmentation fault if var_dump() output is too large.
Fixed bug #1223: Xdebug crashes on PHP 7 when doing a DBGp eval command.
Fixed bug #1229: Issues with GCC 4.8, which in -O2 move removes some required code.
Fixed bug #1235: Xdebug does not compile against PHP 7.1-dev due to ZEND_FETCH_STATIC_PROP*.
Fixed bug #1236: Can't remove breakpoints with negative IDs.
Fixed bug #1238: Xdebug crashes with SIGSEGV while enumerating references in variables.
Fixed bug #1239: Crash due to changes with the CATCH opcode's jump mechanism in 7.1
Fixed bug #1241: Xdebug doesn't handle FAST_RET and FAST_CALL opcodes for branch/dead code analysis, and path coverage.
Fixed bug #1245: xdebug_dump_superglobals dumps *uninitialized* with PHP 7.
Fixed bug #1250: Add PHP version descriptors to debugging log and profile files.
[2015-12-12] — Xdebug 2.4.0RC3

Fixed bugs

Fixed bug #1221: Sort out Windows x64 PHP 7 support
Fixed bug #1229: Detect GCC 4.8 and disable optimisations when it is found
Made the test suite work for Windows too. Finally, after 13 years.
[2015-12-02] — Xdebug 2.4.0RC2

Fixed bugs

Fixed bug #1181: Remote debugging does not handle exceptions after using zend_read_property
Fixed bug #1189: Remove address attribute from remote debugging responses
Fixed bug #1194: The error message is doubly HTML-encoded with assert()
Fixed bug #1210: Segfault with code coverage dead code analysis and foreach on PHP 7
Fixed bug #1215: SIGSEGV if xdebug.trace_output_dir directory does not exist
Fixed bug #1217: xdebug.show_error_trace should not be enabled by default
Fixed bug #1218: Xdebug messes with the exception code, by casting it to int
Fixed bug #1219: Set default value for xdebug.overload_var_dump to 2 to include file / line numbers by default
Use long for PHP 5, and zend_long for PHP 7 for ini settings in the globals
[2015-11-21] — Xdebug 2.4.0RC1

Fixed bugs

Fixed bug #1195: Segfault with code coverage and foreach
Fixed bug #1200: Additional opcodes need to be overloaded for PHP 7
Fixed bug #1202: Anonymous classes are not handled properly while remote debugging
Fixed bug #1203: Accessing static property of a class that has no static properties crashes while remote debugging
Fixed bug #1209: Segfault with building a function name for create_function
[2015-11-05] — Xdebug 2.4.0beta1

Improvements

Implemented bug #1109: Added support for PHP 7.
Implemented bug #1153: Add function monitor functionality.
Implemented bug #1183: Add xdebug.show_error_trace setting to allow/disallow to show a stack trace for every Error (throwable)

Fixed bugs

Fixed bug #1070: Too many open files error with php-fpm: connections not closed. (Patch by Sean Dubois)
Fixed bug #1123: With Xdebug 2.3.1, PHPUnit with coverage is exponentially slower than without
Fixed bug #1166: Using $this in __debugInfo() causes infinite recursion
Fixed bug #1173: Segmentation fault in xdebug_get_monitored_functions()
Fixed bug #1182: Using PHPStorm with PHP 7 RC1 and xdebug 2.4-dev break points are passed by including setting break point at start of script
Fixed bug #1192: Dead code analysis does not work for generators with 'return;'
[2015-06-19] — Xdebug 2.3.3

Fixed bugs

Fixed bug #1130: Escaping issues with docrefs and HTML characters in error messages
Fixed bug #1133: PDO exception code value type is changed
Fixed bug #1137: Windows does not support %zu formatting for sprintf
Fixed bug #1140: Tracing with __debugInfo() crashes Xdebug due to a stack overflow
Fixed bug #1148: Can't disable max_nesting_function
Fixed bug #1151: Crash when another extension calls call_user_function() during RINIT
Fixed crash with code coverage (Antony Dovgal)
Fixed usage of virtual_file_ex and STR_FREE (Remi Collet)
Reset overloaded opcodes at the end of each request (Eran Ifrah)

Improvements

Fixed bug #686: Not possible to inspect SplObjectStorage instances with Xdebug
Fixed bug #864: No attributes are shown if an object extends ArrayIterator
Fixed bug #996: Can't evaluate property of class that extends ArrayObject
Fixed bug #1134: Allow introspection of ArrayObject implementation's internal storage
Get rid of setlocale hack, by using %F instead of %f (and speed up tracing by 15-20%)
[2015-03-22] — Xdebug 2.3.2

Fixed bugs

Fixed bug #1117: Path/branch coverage sometimes crashes
Fixed bug #1121: Segfaults with path/branch coverage
[2015-02-24] — Xdebug 2.3.1

Fixed bugs

Fixed bug #1112: Setting an invalid xdebug.trace_format causes Xdebug to crash
Fixed bug #1113: xdebug.*_trigger do no longer work, due to NULL not being an empty string
[2015-02-22] — Xdebug 2.3.0

Fixed bugs

Fixed bug #932: Added an error message in case the remote debug log couldn't be opened
Fixed bug #982: Incorrect file paths in exception stack trace
Fixed bug #1094: Segmentation fault when attempting to use branch/path coverage
Fixed bug #1101: Debugger is not triggered on xdebug_break() in JIT mode
Fixed bug #1102: Stop Xdebug from crashing when debugging PHP Code with "php -r".
Fixed bug #1103: XDEBUG_SESSION_STOP_NO_EXEC only stops first script executed with auto_prepend|append_files
Fixed bug #1104: One character non-public properties cause issues with debugging
Fixed bug #1105: Setting properties without specifying a type only works in topmost frame (Dominik del Bondio)
Fixed bug #1095: Crash when using a non-associate array key in GLOBALS
Fixed bug #1111: eval does not work when debugger is stopped in xdebug_throw_exception_hook (Dominik del Bondio)

Added features

General

Implemented bug #304: File name and line number info for overloaded var_dump()
Implemented bug #310: Allow class vars and array keys with xdebug_debug_zval()
Implemented bug #722: Add stack trace limit setting.
Implemented bug #1003: Add option to xdebug_print_function_stack() to suppress filename and line number
Implemented bug #1004: Ability to halt on warning/notice
Implemented bug #1015: Added the xdebug.force_display_errors and xdebug.force_error_reporting php.ini-only settings to always override PHP's settings for display_errors and error_reporting
Implemented bug #1023: Add support for PHP 5.6 variadics
Implemented bug #1024: Add support for PHP 5.6's ASSIGN_POW

Debugging

Implemented bug #406: Added support for remote debugging user-defined constants
Implemented bug #495: Added support for the wildcard exception name '*'
Implemented bug #1066: Better error message for SELinux preventing debugging connections
Implemented bug #1084: Added support for extended classes to trigger exception breakpoints
Implemented bug #1084: Added exception code as extra element to debugger XML

Tracing

Implemented bug #341: Added the time index and memory usage for function returns in normal tracefiles
Implemented bug #644: Shared secret for profiler_enable_trigger and trace_enable_trigger with *_value option
Implemented bug #971: Added the trace file option "XDEBUG_TRACE_NAKED_FILENAME" to xdebug_start_trace() to prevent the ".xt" extension from being added
Implemented bug #1021: Added support for return values to computerized trace files
Implemented bug #1022: Added support for serialized variables as format in trace files in the form of option "5" for "xdebug.collect_params"

Code Coverage

Implemented bug #380: Added xdebug_code_coverage_started()
Implemented bug #1034: Add collected path and branch information to xdebug_get_code_coverage() output

Profiling

Implement bug #1054: Support for filename and function name compression in cachegrind files

Changes

Implemented bug #863: Support xdebug.overload_var_dump through ini_set()
Implemented bug #973: Use case-insensitive filename comparison on all systems (Galen Wright-Watson)
Implemented bug #1057: Removed trailing whitespace from example xdebug.ini
Implemented bug #1096: Improve performance improvement for handling breakpoints by ignoring locales (Daniel Sloof)
Implemented bug #1100: Raise default max_nesting_level to 256

Removed features

Support for PHP versions lower than PHP 5.4 have been dropped.
[2015-01-22] — Xdebug 2.2.7

Fixed bugs

Fixed bug #1083: Segfault when requesting a variable for a context that did not have them.
Fixed bug #1087: zend_execute_script or zend_eval_string in RINIT segfaults.
Fixed bug #1088: Xdebug won't show dead and not executed lines at the second time.
Fixed bug #1098: Xdebug doesn't make use of __debugInfo.
Fixed segfaults with ZTS on PHP 5.6.
[2014-11-14] — Xdebug 2.2.6

Fixed bugs

Fixed bug #1048: Can not get $GLOBAL variable by property_value on function context.
Fixed bug #1073 and bug #1075: Segmentation fault with internal functions calling internal functions.
Fixed bug #1085: Fixed the tracefile analyser as the format version had been bumbed.
Fixed memory leaks.
[2014-04-29] — Xdebug 2.2.5

Fixed bugs

Fixed bug #1040: Fixed uninitialized sa value.
Fixed building on hurd-i386.
[2014-02-28] — Xdebug 2.2.4

Fixed bugs

Fixed bug #785: Profiler does not handle closures and call_user_func_array well.
Fixed bug #963: Xdebug waits too long for response from remote client
Fixed bug #976: Xdebug crashes if current varibles scope contains COM object.
Fixed bug #978: Inspection of array with negative keys fails
Fixed bug #979: property_value -m 0 should mean all bytes, not 0 bytes
Fixed bug #987: Hidden property names not shown.
[2013-05-22] — Xdebug 2.2.3

Added features

Added support for PHP 5.5.

Fixed bugs

Fixed bug #923: Xdebug + Netbeans + ext/MongoDB crash on MongoCursor instance
Fixed bug #929: Directory name management in xdebug.profiler_output_dir
Fixed bug #931: xdebug_str_add does not check for NULL str before calling strlen on it
Fixed bug #935: Document the return value from xdebug_get_code_coverage()
Fixed bug #947: Newlines converted when html_errors = 0
[2013-03-23] — Xdebug 2.2.2

Fixed bugs

Fixed bug #598: Use HTTP_X_FORWARDED_FOR to determine remote debugger.
Fixed bug #625: xdebug_get_headers() -> Headers are reset unexpectedly.
Fixed bug #811: PHP Documentation Link.
Fixed bug #818: Require a php script in the PHP_RINIT causes Xdebug to crash.
Fixed bug #903: xdebug_get_headers() returns replaced headers.
Fixed bug #905: Support PHP 5.5 and generators.
Fixed bug #920: AM_CONFIG_HEADER is depreciated.
[2012-07-15] — Xdebug 2.2.1

Fixed bugs

Fixed bug #843: Text output depends on php locale.
Fixed bug #838/bug #839/bug #840: Debugging static properties crashes Xdebug.
Fixed bug #821: Variable assignments (beginning with =>) should be indented one more scope.
Fixed bug #811: PHP Documentation Link.
Fixed bug #800: var_dump(get_class(new foo\bar')) add an extra "\" in class name.
[2012-05-08] — Xdebug 2.2.0

Added features

Support for PHP 5.4.
Added ANSI colour output for the shell. (Including patches by Michael Maclean)
Added var_dump() overloading on the command line (bug #457).
Added better support for closures in stack and function traces.
Added the size of arrays to the overloaded variable output, so that you know how many elements there are.
Added support for X-HTTP-FORWARDED-FOR before falling back to REMOTE_ADDR (bug #660). (Patch by Hannes Magnusson)
Added the method call type to xdebug_get_function_stack() (bug #695).
Added extra information to error printouts to tell that the error suppression operator has been ignored due to xdebug.scream.
Added a error-specific CSS class to stack traces.

New settings

xdebug.cli_color for colouring output on the command line (Unix only).
Added xdebug.trace_enable_trigger to triger function traces through a GET/POST/COOKIE parameter (bug #517). (Patch by Patrick Allaert)
Added support for the 'U' format specifier for function trace and profiler filenames.

Changes

Improved performance by lazy-initializing data structures.
Improved code coverage performance. (Including some patches by Taavi Burns)
Improved compatibility with KCacheGrind.
Improved logging of remote debugging connections, by added connection success/failure logging to the xdebug.remote_log functionality.

Fixed bugs

Fixed bug #827: Enabling Xdebug causes phpt tests to fail because of var_dump() formatting issues.
Fixed bug #823: Single quotes are escaped in var_dumped string output.
Fixed bug #819: Xdebug 2.2.0RC2 can't stand on a breakpoint more than 30 seconds.
Fixed bug #801: Segfault with streamwrapper and unclosed $fp on destruction.
Fixed bug #797: Xdebug crashes when fetching static properties.
Fixed bug #794: Allow coloured output on Windows.
Fixed bug #784: Unlimited feature for var_display_max_data and var_display_max_depth is undocumented.
Fixed bug #774: Apache crashes on header() calls.
Fixed bug #764: Tailored Installation instructions do not work.
Fixed bug #758: php_value xdebug.idekey is ignored in .htaccess files
Fixed bug #728: Profiler reports __call() invocations confusingly/wrongly.
Fixed bug #687: Xdebug does not show dynamically defined variable.
Fixed bug #662: idekey is set to running user.
Fixed bug #627: Added the realpath check.
[2012-04-22] — Xdebug 2.2.0rc2

Fixed bugs

Fixed bug #801: Segfault with streamwrapper and unclosed $fp on destruction.
Fixed bug #794: Allow coloured output on Windows.
Fixed bug #784: Unlimited feature for var_display_max_data and var_display_max_depth is undocumented.
Fixed bug #774: Apache crashes on header() calls.
Fixed bug #764: Tailored Installation instructions do not work.
Fixed bug #758: php_value xdebug.idekey is ignored in .htaccess files
Fixed bug #662: idekey is set to running user.
[2012-03-13] — Xdebug 2.2.0rc1

Added features

Support for PHP 5.4.
Added ANSI colour output for the shell. (Including patches by Michael Maclean)
Added var_dump() overloading on the command line (bug #457).
Added better support for closures in stack and function traces.
Added the size of arrays to the overloaded variable output, so that you know how many elements there are.
Added support for X-HTTP-FORWARDED-FOR before falling back to REMOTE_ADDR (bug #660). (Patch by Hannes Magnusson)
Added the method call type to xdebug_get_function_stack() (bug #695).
Added extra information to error printouts to tell that the error suppression operator has been ignored due to xdebug.scream.
Added a error-specific CSS class to stack traces.

New settings

xdebug.cli_color for colouring output on the command line (Unix only).
Added xdebug.trace_enable_trigger to triger function traces through a GET/POST/COOKIE parameter (bug #517). (Patch by Patrick Allaert)
Added support for the 'U' format specifier for function trace and profiler filenames.

Changes

Improved performance by lazy-initializing data structures.
Improved code coverage performance. (Including some patches by Taavi Burns)
Improved compatibility with KCacheGrind.
Improved logging of remote debugging connections, by added connection success/failure logging to the xdebug.remote_log functionality.

Fixed bugs

No additional bug fixes besides the ones from the 2.1 branch up til Xdebug 2.1.4.
[2012-03-12] — Xdebug 2.1.4

Fixed bugs

Fixed bug #788: Collect errors eats fatal errors.
Fixed bug #787: Segmentation Fault with PHP header_remove().
Fixed bug #778: Xdebug session in Eclipse crash whenever it run into simplexml_load_string call.
Fixed bug #756: Added support for ZEND_*_*_OBJ and self::*.
Fixed bug #747: Still problem with error message and soap client / soap server.
Fixed bug #744: new lines in a PHP file from Windows are displayed with an extra white line with var_dump().
Fixed an issue with debugging and the eval command.
Fixed compilation with ZTS on PHP < 5.3.
[2012-01-25] — Xdebug 2.1.3

Fixed bugs

Fixed bug #725: EG(current_execute_data) is not checked in xdebug.c, xdebug_statement_call.
Fixed bug #723: xdebug is stricter than PHP regarding Exception property types.
Fixed bug #714: Cachegrind files have huge (wrong) numbers in some lines.
Fixed bug #709: Xdebug doesn't understand E_USER_DEPRECATED.
Fixed bug #698: Allow xdebug.remote_connect_back to be set in .htaccess.
Fixed bug #690: Function traces are not appended to file with xdebug_start_trace() and xdebug.trace_options=1.
Fixed bug #623: Static properties of a class can be evaluated only with difficulty.
Fixed bug #614/bug #619: Viewing private variables in base classes through the debugger.
Fixed bug #609: Xdebug and SOAP extension's error handlers conflict.
Fixed bug #606/bug #678/bug #688/bug #689/bug #704: crash after using eval on an unparsable, or un-executable statement.
Fixed bug #305: xdebug exception handler doesn't properly handle special chars.

Other changes

Changed xdebug_break() to hint to the statement execution trap instead of breaking forcefully adding an extra stackframe.
Prevent Xdebug 2.1.x to build with PHP 5.4.
[2011-07-28] — Xdebug 2.1.2

Fixed bugs

Fixed bug #622: Working with eval() code is inconvenient and difficult.
Fixed bug #684: xdebug_var_dump - IE does not support &.
Fixed bug #693: Cachegrind files not written when filename is very long.
Fixed bug #697: Incorrect code coverage of function arguments when using XDEBUG_CC_UNUSED.
Fixed bug #699: Xdebug gets the filename wrong for the countable interface.
Fixed bug #703: Added another opcode to the list that needs to be overridden.
[2011-03-28] — Xdebug 2.1.1
[2011-03-22] — Xdebug 2.1.1rc1

Fixed bugs

Debugger

Fixed bug #518: Removed CLASSNAME pseudo-property optional.
Fixed bug #592: Xdebug crashes with run after detach.
Fixed bug #596: Call breakpoint never works with instance methods, only static methods.
Fixed JIT mode in the debugger so that it works for xdebug_break() too.

Profiler

Fixed bug #631: Summary not written when script ended with "exit()".
Fixed bug #639: Xdebug profiling: output not correct - missing 'cfl='.
Fixed bug #642: Fixed line numbers for offsetGet, offsetSet, __get/__set/__isset/__unset and __call in profile files and stack traces/function traces.
Fixed bug #643: Profiler gets line numbers wrong.
Fixed bug #653: Xdebug profiler crashes with %H in file name and non standard port.

Others

Fixed bug #651: Incorrect code coverage after empty() in conditional.
Fixed bug #654: Xdebug hides error message in CLI.
Fixed bug #665: Xdebug does not respect display_errors=stderr. (Patch by Ben Spencer)
Fixed bug #670: Xdebug crashes with broken "break x" code.
[2010-06-29] — Xdebug 2.1.0

Fixed bugs

Fixed bug #562: Incorrect coverage information for closure function headers.
Fixed bug #566: Xdebug crashes when using conditional breakpoints.
Fixed bug #567: xdebug_debug_zval and xdebug_debug_zval_stdout don't work with PHP 5.3. (Patch by Endo Hiroaki).
Fixed bug #570: undefined symbol: zend_memrchr.
[2010-04-07] — Xdebug 2.1.0rc1

Fixed bugs

Fixed bug #400: Xdebug shows errors, even when PHP is request startup mode.
Fixed bug #421: xdebug sends back invalid characters in xml sometimes.
Fixed bug #475: Property names with null chars are not sent fully to the client.
Fixed bug #480: Issues with the reserved resource in multi threaded environments (Patch by Francis.Grolemund@netapp.com).
Fixed bug #494: Private attributes of parent class unavailable when inheriting.
Fixed bug #558: PHP segfaults when running a nested eval.
[2010-02-27] — Xdebug 2.1.0beta3

Fixed bugs

Fixed memory corruption issues.
Fixed a threading related issue for code-coverage.
Fixed bug #532: Xdebug breaks header() function.
DBGP: Prevent Xdebug from returning properties when a too high page number has been requested.
[2010-02-03] — Xdebug 2.1.0beta2

Fixed bugs

Fixed memory leak in breakpoint handling.
Fixed bug #528: Core dump generated with remote_connect_back option set and CLI usage.
Fixed bug #515: declare(ticks) statement confuses code coverage.
Fixed bug #512: DBGP: breakpoint_get doesn't return conditions in its response.
Possible fix for bug #507/#517: Crashes because of uninitalised header globals.
Fixed bug #501: Xdebug's variable tracing misses POST_INC and variants.
[2010-01-03] — Xdebug 2.1.0beta1

Added features

Added error display collection and suppressions.
Added the recording of headers being set in scripts.
Added variable assignment tracing.
Added the ability to turn of the default overriding of var_dump().
Added "Scream" support, which disables the @ operator.
Added a trace-file analysing script.
Added support for debugging into phars.
Added a default xdebug.ini. (Patch by Martin Schuhfuß <martins@spot-media.de>)
Added function parameters in computerized function traces.
PHP 5.3 compatibility.
Improved code coverage accuracy.

New functions

xdebug_get_formatted_function_stack(), which returns a formatted function stack instead of displaying it.
xdebug_get_headers(), which returns all headers that have been set in a script, both explicitly with things like header(), but also implicitly for things like setcookie().
xdebug_start_error_collection(), xdebug_stop_error_collection() and xdebug_get_collected_errors(), which allow you to collect all notices, warnings and error messages that Xdebug generates from PHP's error_reporting functionality so that you can output them at a later point in your script by hand.

New settings

xdebug.collect_assignments, which enables the emitting of variable assignments in function traces.
xdebug.file_line_format, to generate a link with a specific format for every filename that Xdebug outputs.
xdebug.overload_var_dump, which allows you to turn off Xdebug's version of var_dump().
xdebug.remote_cookie_expire_time, that controls the length of a remote debugging session. (Patch by Rick Pannen <pannen@gmail.com>)
xdebug.scream, which makes the @ operator to be ignored.

Changes

Added return values for xdebug_start_code_coverage() and xdebug_stop_code_coverage() to indicate whether the action was succesfull. xdebug_start_code_coverage() will return TRUE if the call enabled code coverage, and FALSE if it was already enabled. xdebug_stop_code_coverage() will return FALSE when code coverage wasn't started yet and TRUE if it was turned on.
Added an optional argument to xdebug_print_function_stack() to display your own message. (Patch by Mikko Koppanen).
All HTML output as generated by Xdebug now has a HTML "class" attribute for easy CSS formatting.

Removed features

Support for PHP versions lower than PHP 5.1 have been dropped.
The PHP3 and GDB debugger engines have been removed.

Fixed bugs

Fixed support for showing $this in remote debugging sessions.
Fixed bug in formatting the display of "Variables in the local scope".
Possible fix for a threading issue where the headers gathering function would create stack overflows.
Possible fix for bug #324: xdebug_dump_superglobals() only dumps superglobals that were accessed before, and #478: Xdebug 2.0.x can't use %R in xdebug.profiler_output_name if register_long_arrays is off.
Fixed bug #505: %s in xdebug.trace_output_name breaks functions traces.
Fixed bug #494: Private attributes of parent class unavailable when inheriting.
Fixed bug #486: feature_get -n breakpoint_types returns out of date list.
Fixed bug #476: Xdebug doesn't support PHP 5.3's exception chaining.
Fixed bug #472: Dead Code Analysis for code coverage messed up after goto.
Fixed bug #470: Catch blocks marked as dead code unless executed.
Fixed bug #469: context_get for function variables always appear as "uninitialized".
Fixed bug #468: Property_get on $GLOBALS works only at top-level, by adding GLOBALS to the super globals context.
Fixed bug #453: Memory leaks.
Fixed bug #445: error_prepend_string and error_append_string are ignored by xdebug_error_cb. (Patch by Kent Davidson <kent@marketruler.com>)
Fixed bug #442: configure: error: "you have strange libedit".
Fixed bug #439: Xdebug crash in xdebug_header_handler.
Fixed bug #423: Conflicts with funcall.
Fixed bug #419: Make use of P_tmpdir if defined instead of hard coded '/tmp'.
Fixed bug #417: Response of context_get may lack page and pagesize attributes.
Fixed bug #411: Class/function breakpoint setting does not follow the specs.
Fixed bug #393: eval returns array data at the previous page request.
Fixed bug #391: Xdebug doesn't stop executing script on catchable fatal errors.
Fixed bug #389: Destructors called on fatal error.
Fixed bug #368: Xdebug's debugger bails out on a parse error with the eval command.
Fixed bug #356: Temporary breakpoints persist.
Fixed bug #355: Function numbers in trace files weren't unique.
Fixed bug #340: Segfault while throwing an Exception.
Fixed bug #328: Private properties are incorrectly enumerated in case of extended classes.
Fixed bug #249: Xdebug's error handler messes up with the SOAP extension's error handler.

DBGP

Fixed cases where private properties where shown for objects, but not accessible.
Added a patch by Lucas Nealan (lucas@php.net) and Brian Shire (shire@php.net) of Facebook to allow connections to the initiating request's IP address for remote debugging.
Added the -p argument to the eval command as well, pending inclusion into DBGP.
Added the retrieval of a file's execution lines. I added a new un-official method called xcmd_get_executable_lines which requires the stack depth as argument (-d). You can only fetch this information for stack frames as it needs an available op-array which is only available when a function is executed.
Added a fake "CLASSNAME" property to objects that are returned in debug requests to facilitate deficiencies in IDEs that fail to show the "classname" XML attribute.
[2009-07-03] — Xdebug 2.0.5

Fixed bugs

Fixed bug #425: memory leak (around 40MB for each request) when using xdebug_start_trace.
Fixed bug #422: Segfaults when using code coverage with a parse error in the script.
Fixed bug #418: compilation breaks with CodeWarrior for NetWare.
Fixed bug #403: 'call' and 'return' breakpoints triggers both on call and return for class method breakpoints.
Fixed TSRM issues for PHP 5.2 and PHP 5.3. (Original patch by Elizabeth M. Smith).
Fixed odd crash bugs, due to GCC 4 sensitivity.

Added features

Support debugging into phars.
Basic PHP 5.3 support.
[2008-12-30] — Xdebug 2.0.4

Fixed bugs

Fixed for strange jump positions in path analysis.
Fixed issues with code coverage crashing on parse errors.
Fixed code code coverage by overriding more opcodes.
Fixed issues with Xdebug stalling/crashing when detaching from remote debugging.
Fixed crash on Vista where memory was freed with routines from a different standard-C library than it was allocated with. (Patch by Eric Promislow <ericp@activestate.com>).
Link against the correct CRT library. (Patch by Eric Promislow <ericp@activestate.com>).
Sort the symbol elements according to name. (Patch by Eric Promislow <ericp@activestate.com>).
Fixed support for mapped-drive UNC paths for Windows. (Patch by Eric Promislow <ericp@activestate.com>).
Fixed a segfault in interactive mode while including a file.
Fixed a crash in super global dumping in case somebody was strange enough to reassign them to a value type other than an Array.
Simplify version checking for libtool. (Patch by PGNet <pgnet.trash@gmail.com>).
Fixed display of unused returned variables from functions in PHP 5.3.
Include config.w32 in the packages as well.
Fixed .dsp for building with PHP 4.

Added features

Support debugging into phars.
Basic PHP 5.3 support.
[2008-04-09] — Xdebug 2.0.3

Fixed bugs

Fixed bug #338: Crash with: xdebug.remote_handler=req.
Fixed bug #334: Code Coverage Regressions.
Fixed abstract method detection for PHP 5.3.
Fixed code coverage dead-code detection.
Ignore ZEND_ADD_INTERFACE, which is on a different line in PHP >= 5.3 for some weird reason.

Changes

Added a CSS-class for xdebug's var_dump().
Added support for the new E_DEPRECATED.
[2007-11-11] — Xdebug 2.0.2

Fixed bugs

Fixed bug #325: DBGP: "detach" stops further sessions being established from Apache.
Fixed bug #321: Code coverage crashes on empty PHP files.
Fixed bug #318: Segmentation Fault in code coverage analysis.
Fixed bug #315: Xdebug crashes when including a file that doesn't exist.
Fixed bug #314: PHP CLI Error Logging thwarted when Xdebug Loaded.
Fixed bug #300: Direction of var_dump().
Always set the transaction_id and command. (Related to bug #313).
[2007-10-20] — Xdebug 2.0.1

Changes

Improved code coverage performance dramatically.
PHP 5.3 compatibility (no namespaces yet though).

Fixed bugs

Fixed bug #301: Loading would cause SIGBUS on Solaris 10 SPARC. (Patch by Sean Chalmers)
Fixed bug #300: Xdebug does not force LTR rendering for its tables.
Fixed bug #299: Computerized traces don't have a newline for return entries if memory limit is not enabled.
Fixed bug #298: xdebug_var_dump() doesn't handle entity replacements correctly concerning string length.
Fixed a memory free error related to remote debugging conditions. (Related to bug #297).
[2007-07-18] — Xdebug 2.0.0

Changes

Put back the disabling of stack traces - apperently people were relying on this. This brings back xdebug_enable(), xdebug_disable() and xdebug_is_enabled().
xdebug.collect_params is no longer a boolean setting. Although it worked fine, phpinfo() showed only just On or Off here.
Fixed the Xdebug version of raw_url_encode to not encode : and \. This is not necessary according to the RFCs and it makes debug breakpoints work on Windows.

Fixed bugs

Fixed bug #291: Tests that use SPL do not skip when SPL is not available.
Fixed bug #290: Function calls leak memory.
Fixed bug #289: Xdebug terminates connection when eval() is run in the init stage.
Fixed bug #284: Step_over on breakpointed line made Xdebug break twice.
Fixed bug #283: Xdebug always returns $this with the value of last stack frame.
Fixed bug #282: %s is not usable for xdebug.profiler_output_name on Windows in all stack frames.
Fixed bug #280: var_dump() doesn't display key of array as expected.
Fixed bug #278: Code Coverage Issue.
Fixed bug #273: Remote debugging: context_get does not return context id.
Fixed bug #270: Debugger aborts when PHP's eval() is encountered.
Fixed bug #265: Xdebug breaks error_get_last() .
Fixed bug #261: Code coverage issues by overloading zend_assign_dim.

DBGP

Added support for "breakpoint_languages".
[2007-05-17] — Xdebug 2.0.0RC4

Changes

Use µ seconds instead of a tenths of µ seconds to avoid confusion in profile information.
Changed xdebug.profiler_output_name and xdebug.trace_output_name to use modifier tags:
%c
crc32 of the current working directory
%p
pid
%r
random number
%s
script name
%t
timestamp (seconds)
%u
timestamp (microseconds)
%H
$_SERVER['HTTP_HOST']
%R
$_SERVER['REQUEST_URI']
%S
session_id (from $_COOKIE if set)
%%
literal %

Fixed bugs

Fixed bug #255: Call Stack Table doesn't show Location on Windows.
Fixed bug #251: Using the source command with an invalid filename returns unexpected result.
Fixed bug #243: show_exception_trace="0" ignored.
Fixed bug #241: Crash in xdebug_get_function_stack().
Fixed bug #240: Crash with xdebug.remote_log on Windows.
Fixed a segfault in rendering stack traces to error logs.
Fixed a bug that prevented variable names from being recorded for remote debug session while xdebug.collect_vars was turned off.
Fixed xdebug_dump_superglobals() in case no super globals were configured.

Removed functions

Removed support for Memory profiling as that didn't work properly.
Get rid of xdebug.default_enable setting and associated functions: xdebug_disable() and xdebug_enable().

Added features

Implemented support for four different xdebug.collect_params settings for stack traces and function traces.
Allow to trigger profiling by the XDEBUG_PROFILE cookie.

DBGP

Correctly add namespace definitions to XML.
Added the xdebug namespace that adds extra information to breakpoints if available.
Stopped the use of elements for exception breakpoints, as that violates the protocol.
[2007-01-31] — Xdebug 2.0.0RC3

Changes

Removed the bogus "xdebug.allowed_clients" setting - it was not implemented.
Optimized used variable collection by switching to a linked list instead of a hash. This is about 30% faster, but it needed a quick conversion to hash in the case the information had to be shown to remove duplicate variable names.

Fixed bugs

Fixed bug #232: PHP log_errors functionality lost after enabling xdebug error handler when CLI is used.
Fixed problems with opening files - the filename could cause double free issues.
Fixed memory tracking as memory_limit is always enabled in PHP 5.2.1 and later.
Fixed a segfault that occurred when creating printable stack traces and collect_params was turned off.
[2006-12-24] — Xdebug 2.0.0RC2

Added new features

Implemented the "xdebug.var_display_max_children" setting. The default is set to 128 children.
Added types to fancy var dumping function.
Implemented FR #210: Add a way to stop the debug session without having to execute a script. The GET/POST parameter "XDEBUG_SESSION_STOP_NO_EXEC" works in the same way as XDEBUG_SESSION_STOP, except that the script will not be executed.
DBGP: Allow postmortem analysis.
DBGP: Added the non-standard function xcmd_profiler_name_get.

Changes

Fixed the issue where xdebug_get_declared_vars() did not know about variables there are in the declared function header, but were not used in the code. Due to this change expected arguments that were not send to a function will now show up as ??? in stack and function traces in PHP 5.1 and PHP 5.2.
Allow xdebug.var_display_max_data and xdebug.var_display_max_depth settings of -1 which will unlimit those settings.
DBGP: Sort super globals in Globals overview.
DBGP: Fixed a bug where error messages where not added upon errors in the protocol.
DBGP: Change context 1 from globals (superglobals + vars in bottom most stack frame) to just superglobals.

Fixed bugs

Fixed linking error on AIX by adding libm.
Fixed dead code analysis for THROW.
Fixed oparray prefill caching for code coverage.
Fixed the xdebug.remote_log feature work.
DBGP: Fixed a bug where $this did not appear in the local scoped context.
DBGP: Reimplemented property_set to use the same symbol fetching function as property_get. We now only use eval in case no type (-t) argument was given.
DBGP: Fixed some issues with finding out the classname, which is important for fetching private properties.
DBGP: Fixed usage of uninitialized memory that prevented looking up numerical array keys while fetching array elements not work properly.
Fixed bug #228: Binary safety for stream output and property fetches.
Fixed bug #227: The SESSION super global does not show up in the Globals scope.
Fixed bug #225: xdebug dumps core when protocol is GDB.
Fixed bug #224: Compile failure on Solaris.
Fixed bug #219: Memory usage delta in traces don't work on PHP 5.2.0.
Fixed bug #215: Cannot retrieve nested arrays when the array key is a numeric index.
Fixed bug #214: The depth level of arrays was incorrectly checked so it would show the first page of a level too deep as well.
Fixed bug #213: Dead code analysis doesn't take catches for throws into account.
Fixed bug #211: When starting a new session with a different idekey, the cookie is not updated.
Fixed bug #209: Additional remote debugging session started when triggering shutdown function.
Fixed bug #208: Socket connection attempted when XDEBUG_SESSION_STOP.
Fixed PECL bug #8989: Compile error with PHP 5 and GCC 2.95.
[2006-10-08] — Xdebug 2.0.0RC1

Added new features

Implemented FR #70: Provide optional depth on xdebug_call_* functions.
Partially implemented FR #50: Resource limiting for variable display. By default only two levels of nested variables and max string lengths of 512 are shown. This can be changed by setting the ini settings xdebug.var_display_max_depth and xdebug.var_display_max_data.
Implemented breakpoints for different types of PHP errors. You can now set an 'exception' breakpoint on "Fatal error", "Warning", "Notice" etc. This is related to bug #187.
Added the xdebug_print_function_trace() function to display a stack trace on demand.
Reintroduce HTML tracing by adding a new tracing option "XDEBUG_TRACE_HTML" (4).
Made xdebug_stop_trace() return the trace file name, so that the following works: <?php echo file_get_contents( xdebug_stop_trace() ); ?>
Added the xdebug.collect_vars setting to tell Xdebug to collect information about which variables are used in a scope. Now you don't need to show variables with xdebug.show_local_vars anymore for xdebug_get_declared_vars() to work.
Make the filename parameter to the xdebug_start_trace() function optional. If left empty it will use the same algorithm to pick a filename as when you are using the xdebug.auto_trace setting.

Changes

Implemented dead code analysis during code coverage for: abstract methods, dead code after return, throw and exit, and implicit returns when a normal return is present.
Improved readability of stack traces.
Use PG(html_errors) instead of checking whether we run with CLI when deciding when to use HTML messages or plain text messages.

Fixed bugs

Fixed bug #203: PHP errors with HTML content processed incorrectly. This patch backs out the change that was made to fix bug #182.
Fixed bug #198: Segfault when trying to use a non-existing debug handler.
Fixed bug #197: Race condition fixes created too many files.
Fixed bug #196: Profile timing on Windows does not work.
Fixed bug #195: CLI Error after debugging session.
Fixed bug #193: Compile problems with PHP 5.2.
Fixed bug #191: File/line breakpoints are case-sensitive on Windows.
Fixed bug #181: Xdebug doesn't handle uncaught exception output correctly.
Fixed bug #173: Coverage produces wrong coverage.
Fixed a typo that prevented the XDEBUG_CONFIG option "profiler_enable" from working.
[2006-06-30] — Xdebug 2.0.0beta6

Added new features

Implemented FR #137: feature_get for general commands doesn't have a text field.
Implemented FR #131: Xdebug needs to implement paged child object requests.
Implemented FR #124: Add backtrace dumping information when exception thrown.
Implemented FR #70: Add feature_get breakpoint_types.
Added profiling aggregation functions (patch by Andrei Zmievski)
Implemented the "timestamp" option for the xdebug.trace_output_name and xdebug.profiler_output_name settings.
Added the xdebug.remote_log setting that allows you to log debugger communication to a log file for debugging. This can also be set through the "remote_log" element in the XDEBUG_CONFIG environment variable.
Added a "script" value to the profiler_output_name option. This will write the profiler output to a filename that consists of the script's full path (using underscores). ie: /var/www/index.php becomes var_www_index_php_cachegrind.out. (Patch by Brian Shire).
DBGp: Implemented support for hit conditions for breakpoints.
DBGp: Added support for conditions for file/line breakpoints.
DBGp: Added support for hit value checking to file/line breakpoints.
DBGp: Added support for "exception" breakpoints.

Performance improvements

Added a cache that prevents the code coverage functionality from running a "which code is executable check" on every function call, even if they were executed multiple times. This should speed up code coverage a lot.
Speedup Xdebug but only gathering information about variables in scopes when either remote debugging is used, or show_local_vars is enabled.

Fixed bugs

Fixed bug #184: problem with control chars in code traces
Fixed bug #183: property_get -n $this->somethingnonexistent crashes the debugger.
Fixed bug #182: Errors are not html escaped when being displayed.
Fixed bug #180: collected includes not shown in trace files. (Patch by Cristian Rodriguez)
Fixed bug #178: $php_errormsg and Track errors unavailable.
Fixed bug #177: debugclient fails to compile due to Bison.
Fixed bug #176: Segfault using SplTempFileObject.
Fixed bug #173: Xdebug segfaults using SPL ArrayIterator.
Fixed bug #171: set_time_limit stack overflow on 2nd request.
Fixed bug #168: Xdebug's DBGp crashes on an eval command where the result is an array.
Fixed bug #125: show_mem_delta does not calculate correct negative values on 64bit machines.
Fixed bug #121: property_get -n $r[2] returns the whole hash.
Fixed bug #111: xdebug does not ignore set_time_limit() function during debug session.
Fixed bug #87: Warning about headers when "register_shutdown_function" used.
Fixed PECL bug #6940 (Xdebug ignores set_time_limit)
Fixed Komodo bug 45484: no member data for objects in PHP debugger.
Suppress NOP/EXT_NOP from being marked as executable code with Code Coverage.
[2005-12-31] — Xdebug 2.0.0beta5

Added new features

Implemented FR #161: var_dump doesn't show lengths for strings.
Implemented FR #158: Function calls from the {main} scope always have the line number 0.
Implemented FR #156: it's impossible to know the time taken by the last func call in xdebug trace mode 0.
Implemented FR #153: xdebug_get_declared_vars().

Fixed bugs

Fixed shutdown crash with ZTS on Win32
Fixed bad memory leak when a E_ERROR of exceeding memory_limit was thrown.
Fixed bug #154: GCC 4.0.2 optimizes too much out with -O2.
Fixed bug #141: Remote context_get causes segfault.
[2004-11-29]

Added new features

DBGP: Added error messages to returned errors (in most cases)

Added new functions

xdebug_debug_zval() to debug zvals by printing its refcounts and is_ref values.

Changed features

xdebug_code_coverage_stop() will now clean up the code coverage array, unless you specify FALSE as parameter.
The proper Xdebug type is "hash" for associative arrays.
Extended the code-coverage functionality by returning lines with executable code on them, but where not executed with a count value of -1.

Fixed bugs

DBGP: Make property_get and property_value finally work as they should, including retrieving information from different depths then the most top stack frame.
DBGP: Fix eval'ed $varnames in property_get.
DBGP: Support the -d option for property_get.
Fixed the exit handler hook to use the new "5.1" way of handling it; which fortunately also works with PHP 5.0.
Fixed bug #102: Problems with configure for automake 1.8.
Fixed bug #101: crash with set_exeception_handler() and uncatched exceptions.
Fixed bug #99: unset variables return the name as a string with property_get.
Fixed bug #98: 'longname' attribute not returned for unintialized property in context_get request.
Fixed bug #94: xdebug_sprintf misbehaves with x86_64/glibc-2.3.3
Fixed bug #93: Crash in lookup_hostname on x86_64
Fixed bug #92: xdebug_disable() doesn't disable the exception handler.
Fixed bug #68: Summary not written when script ended with "exit()".
[2004-09-15]

Added new features

Added support for the new DBGp protocol for communicating with the debug engine.
A computerized trace format for easier parsing by external programs.
The ability to set remote debugging features via the environment. This allows an IDE to emulate CGI and still pass the configuration through to the debugger. In CGI mode, PHP does not allow -d arguments.
Reimplementation of the tracing code, you can now only trace to file; this greatly enhances performance as no string representation of variables need to be kept in memory any more.
Re-implemented profiling support. Xdebug outputs information the same way that cachegrind does so it is possible to use Kcachegrind as front-end.
Xdebug emits warnings when it was not loaded as a Zend extension.
Added showing private, protected and public to the fancy var_dump() replacement function.
Added the setting of the TCP_NODELAY socket option to stop delays in transferring data to the remote debugger client. (Patch by Christof J. Reetz)
DebugClient: Added setting for port to listen on and implemented running the previous command when pressing just enter.

Added new functions

xdebug_get_stack_depth() to return the current stack depth level.
xdebug_get_tracefile_name() to retrieve the name of the tracefile. This is useful in case auto trace is enabled and you want to clean the trace file.
xdebug_peak_memory_usage() which returns the peak memory used in a script. (Only works when --enable-memory-limit was enabled)

Added feature requests

FR #5: xdebug_break() function which interupts the script for the debug engine.
FR #30: Dump current scope information in stack traces on error.
FR #88: Make the url parameter XDEBUG_SESSION_START optional. So it can be disabled and the user does not need to add it.

Added new php.ini settings

xdebug.auto_trace_file: to configure a trace file to write to as addition to the xdebug.auto_trace setting which just turns on tracing.
xdebug.collect_includes: separates collecting names of include files from the xdebug.collect_params setting.
xdebug.collect_return: showing return values in traces.
xdebug.dump_global: with which you can turn off dumping of super globals even in you have that configured.
xdebug.extended_info: turns off the generation of extended opcodes that are needed for stepping and breakpoints for the remote debugger. This is useful incase you want to profile memory usage as the generation of this extended info increases memory usage of oparrrays by about 33%.
xdebug.profiler_output_dir: profiler output directory.
xdebug.profiler_enable: enable the profiler.
xdebug.show_local_vars: turn off the showing of local variables in the top most stack frame on errors.
xdebug.show_mem_delta: show differences between current and previous memory usage on a function call level.
xdebug.trace_options: to configure extra options for trace dumping: o XDEBUG_TRACE_APPEND option (1)

Changed features

xdebug_start_trace() now returns the filename of the tracefile (.xt is added to the requested name).
Changed default debugging protocol to dbgp instead of gdb.
Changed default debugger port from 17869 to 9000.
Changed trace file naming: xdebug.trace_output_dir is now used to configure a directory to dump automatic traces; the trace file name now also includes the pid (xdebug.trace_output_name=pid) or a crc32 checksum of the current working dir (xdebug.trace_output_name=crc32) and traces are not being appended to an existing file anymore, but simply overwritten.
Removed $this and $GLOBALS from showing variables in the local scope.

Removed functions

xdebug_get_function_trace/xdebug_dump_function_trace() because of the new idea of tracing.

Fixed bugs

Fixed bug #89: var_dump shows empty strings garbled.
Fixed bug #85: Xdebug segfaults when no idekey is set.
Fixed bug #83: More than 32 parameters functions make xdebug crash.
Fixed bug #75: xdebug's var_dump implementation is not binary safe.
Fixed bug #73: komodo beta 4.3.7 crash.
Fixed bug #72: breakpoint_get returns wrong structure.
Fixed bug #69: Integer overflow in cachegrind summary.
Fixed bug #67: Filenames in Xdebug break URI RFC with spaces.
Fixed bug #64: Missing include of xdebug_compat.h.
Fixed bug #57: Crash with overloading functions.
Fixed bug #54: source command did not except missing -f parameter.
Fixed bug #53: Feature get misusing the supported attribute.
Fixed bug #51: Only start a debug session if XDEBUG_SESSION_START is passed as GET or POST parameter, or the DBGP_COOKIE is send to the server. Passing XDEBUG_SESSION_STOP as GET/POST parameter will end the debug session and removes the cookie again. The cookie is also passed to the remote handler backends; for DBGp it is added to the packet.
Fixed bug #49: Included file's names should not be stored by address.
Fixed bug #44: Script time-outs should be disabled when debugging.
Fixed bug #36: GDB handler using print causes segfault with wrong syntax
Fixed bug #33: Implemented the use of the ZEND_POST_DEACTIVATE hook. Now we can handle destructors safely too.
Fixed bug #32: Unusual dynamic variables cause xdebug to crash.
[2003-12-26]
GDB: Added file/line to signals.
Fixed logging to adhere to the error_reporting setting.
Fixed bug #32: Unusual dynamic variables cause xdebug to crash.
Fixed bug #31: & entity replaced after others, wrong HTML output.
Fixed bug #22: Segmentation fault with xdebug_get_function_stack() and collect_params=1.
[2003-11-08]
Added version info to handlers which show in phpinfo() output.
GDB: Fixed bug with continuing after breakpoint where only 'cont' worked.
GDB: Fixed bug in deleting absolute breakpoints on Windows.
Fixed bug #27: Repeated connect attempts when no debugger is listening.
Fixed bug #19: The value of xdebug.output_dir in a .htaccess never takes effect.
Fixed bug #18: Mistyped sizeof()'s for array indexes in profiler output.
Fixed handling stack traces for when display_errors was set to Off.
Fixed segfault where a function name didn't exist in case of a "call_user_function".
Fixed reading a filename in case of an callback to a PHP function from an internal function (like "array_map()").
[2003-09-18]
Fixed bug with wrong file names for functions called from call_user_*().
[2003-08-30]
Added the option "dump_superglobals" to the remote debugger. If you set this option to 0 the "show-local" and similar commands will not return any data from superglobals anymore.
[2003-08-30]
Fixed bug #2: "pear package" triggers a segfault.
Fixed crash bug when a function had sprintf style parameters (ie. strftime()).
[2003-07-16]
Added "id" attribute to <var /> elements in responses from the remove debugger when the response method is XML. This makes it possible to distinguish between unique elements by use of recursion for example.
Greatly cut down on the overhead that Xdebug causes on running scripts.
Fixed a bug with "quit" that would disable the extension.
Fixed a bug in the folding of recursive elements.
[2003-07-03]
Implemented an argument to the "bt" command. If this is set to "full" all local variables for a stack frame are showed too.
[2003-06-28]
Updated licence: "PHP Licence" was renamed to "Xdebug Licence", "The PHP Group" to "Derick Rethans" and "PHP" to "Xdebug".
Added the xdebug_time_index() function which returns the time index since the start of the script.
[2003-06-23]
Updated licence: "PHP Licence" was renamed to "Xdebug Licence", "The PHP Group" to "Derick Rethans" and "PHP" to "Xdebug".
Implemented the "show-breakpoints" command which shows all currently active breakpoints including conditions.
[2003-05-14]
Implemented the "show-local" command (shows all local variables in the current scope including all contents) and conditions for breakpoints in the "break" command.
[2003-04-27]
Added a fancy replacement function for var_dump which overloads the standard PHP function while HTML errors are enabled.
[2003-04-21]
Added the xdebug_call_class function as addition to xdebug_call_function.
[2003-04-19]
Re-implemented the maximum nesting level protection.
[2003-04-18]
Turned off xdebug.collect_params by default.
Fix problems with symbols on MacOSX.
[2003-04-14]
Fixed handling pathnames and files under Windows for the debugger.
[2003-04-10]
Fixed accessing of superglobal variables from the debugger client.
[2003-04-06]
Fixed a segfault that happened while dealing with include files with ZE2.
[2003-04-05]
Allow remote debugging to be enabled in httpd.conf and .htaccess files.
Added code coverage, enable with xdebug_start_code_coverage(), disable with xdebug_stop_code_coverage() and get the information with xdebug_get_code_coverage(). The latter returns an array with each element being an array containing the lines and the number of times a statement was run on that line, per executed file.
[2003-02-14]
Added dumping of super globals when an error occurs.
[2003-01-27]
Added an XML transport layer for the remote debugger.
[2003-01-22]
Fixed handling of 'continue' (in addition to 'cont').
[2003-01-14]
Updated Xdebug to support Zend Engine 2 (PHP 5.0.0-dev).
[2003-01-07]
Implemented the "eval" (evalutes PHP code) to the remote debugger.
[2003-01-05]
Enabled support for Windows again.
directing profiling output to
[2002-12-20]
Fixed the "init" state of the debugger, from now on you can print data (like environment variables) from this state.
The array returned by get_function_trace() now includes the memory footprint and timing information.
[2002-12-08]
Automatic profiling added, including redirecting profiling output to disk.
[2002-11-29]
Added a new profiling mode: Stack-Dump.
[2002-11-27]
Basic profiling added to Xdebug, including three new functions: xdebug_start_profiling() that begins profiling process, xdebug_stop_profiling() that ends the profiling process and xdebug_dump_function_trace() that dumps the profiling data.
[2002-11-15]
Implemented the "kill" (kills the running script) and "delete" (deletes an already set breakpoint) command for the remote debugger.
[2002-11-13]
Parameters to functions are no longer recorded by default; use the xdebug.collect_params=1 setting in php.ini to turn it on again.
[2002-11-12]
Made the xdebug server and client working under Windows.
[2002-11-09]
Implemented the "next" (step over) and "finish" (step out) commands for the remote debugger.
[2002-11-07]
Lots of small bugfixes, under them memory leaks and crash bugs.
[2002-11-03]
Implemented the "list" (source listing), "print" (printing variable contents), "show" (show all variables in the scope), "step" (step through execution) and "pwd" (print working directory) commands to the remote debugger.
[2002-10-29]
Implemented class::method, object->method and file.ext:line style breakpoints.
Changed debugger port from 7869 to 17869.
[2002-10-28]
Added xdebug.collect_params setting. If this setting is on (the default) then Xdebug collects all parameters passed to functions, otherwise they are not collected at all.
Implemented correct handling of include/require and eval.
[2002-10-22]
Fixed bug which caused wrong filenames to be reported.
[2002-10-18]
Added automatic starting of function traces (xdebug.auto_trace, defaulting to "off").
Xdebug no longer supports PHP versions below PHP 4.3.0pre1.
Added gdb compatible debugger handler with support for simple (function only) breakpoints.
[2002-09-16]
Fixed bug with argument lists.
[2002-09-04]
Implemented remote debugger handler abstraction.
Added a php3 compatible debugger handler.
[2002-09-01]
Fixed memory footprint readings by not counting memory used by xdebug.
[2002-08-30]
Implemented gathering of parameters to internal functions. (Only works with recent PHP 4.3.0-dev versions!)
[2002-08-28]
Bugs, better performance and update of the xdebug_get_function_trace().
[2002-08-27]
Add much better routine for getting data from Zend.
[2002-06-23]
Xdebug no longer relies on PHP's output buffering mechanism. This caused problems with PEAR.
[2002-06-16]
Added PECL package.xml file to make xdebug installable by PEAR.
Flush the log file after every line during function tracing to file.
Removed the xdebug_* functions from the returned/showed function stracks and traces.
[2002-06-09]
Rewrote xdebug_get_function_stack() and xdebug_get_function_trace() to return data in multidimensional arrays.
[2002-06-06]
Add support for classnames, variable include files and variable function names.
Implemented links to the PHP Manual in traces.
Added timestamps and memory usage to function traces
[2002-06-02]
Fixed a crash when using user defined session handlers.
[2002-05-29]
Implemented variable function names.
[2002-05-26]
Unify showing unknown data.
[2002-05-25]
Implemented much better parameter tracing for user defined functions.
[2002-05-18]
Renamed xdebug_get_function_trace() to xdebug_dump_function_trace().
Implemented new xdebug_get_function_trace() to return the function trace in an array.
Added a parameter to xdebug_start_trace(). When this parameter is used, xdebug will dump a function trace to the filename which this parameter speficies.Fixed functions as parameters to functions
[2002-05-17]
Fixed functions as parameters to functions
[2002-05-15]
Fix logging to the systemlog
[2002-05-14]
Make xdebug respect the value of the error_reporting setting
[2002-05-12]
Added handling single-dimensional constant arrays as parameter to functions
[2002-05-11]
Implemented function traces (xdebug_start_trace(), xdebug_stop_trace() and xdebug_get_function_trace())
Added support for Windows to xdebug
[2002-05-08]
Implemented handling of static method calls (foo::bar())
[2002-05-07]
Implemented correct handling of include(), require() and eval()
[2002-05-06]
Fix removal of elements from the stack
[2002-05-03]
Added ini_settings and functions to disable and enable showing stacktraces from within your PHP script
[2002-05-02]
Added xdebug_memory_usage() which returns the amount of memory used by the PHP script