Functionality

The Xdebug extension helps you debugging your script by providing a lot of valuable debug information. The debug information that Xdebug can provide includes the following:

• stack traces and function traces in error messages with:
  • full parameter display for user defined functions
  • function name, file name and line indications
  • support for member functions
• memory allocation
• protection for infinite recursions

Xdebug also provides:

• profiling information for PHP scripts
• code coverage analysis
• capabilities to debug your scripts interactively with a debug client

Announcements

[09-04-2008]

I just released Xdebug 2.0.3 - which features bugfixes and PHP 5.3 compatibility. The whole change log can be found on the updates page.

As with most open source projects, it's very hard to know who are actually the users of the project. As I would like to know my users better, I would invite everybody who finds Xdebug useful to send me a postcard with their location. (Address is here at the top of the page). I am looking forwards to find out who you are!

[11-11-2007]

I just released Xdebug 2.0.2 - which features bugfixes related to the improved code coverage support that was introduced in 2.0.1. The whole change log can be found on the updates page.

As with most open source projects, it's very hard to know who are actually the users of the project. As I would like to know my users better, I would invite everybody who finds Xdebug useful to send me a postcard with their location. (Address is here at the top of the page). I am looking forwards to find out who you are!

[20-10-2007]

I just released Xdebug 2.0.1 - which features some bugfixes, while the major thing is the immense increase in performance of code coverage. The whole change log can be found on the updates page.

[18-07-2007]

It is finally here, Xdebug 2.0.0 has arrived! After about four years of work I finally found it ready to release. Have fun! After almost four years of work, Xdebug 2 is finally ready. With improved functionality and many new features it is ready to totally change the way you develop in PHP. Some of the new features and updates include improved stack traces, execution traces to files, code coverage analysis and much improved remote debugging support. Xdebug's documentation has also been rewritten for more clarity.

[17-05-2007]

Xdebug version 2.0.0RC4 has been released. There are two major changes that needs some introduction. The first one is that the profiler_output_name and trace_output_name settings no longer accept simple values such as "crc32", but instead now accept different format specifiers, very similar to printf() and strftime() modifiers. This will show up in the newly organized documentation very soon as well.

[31-01-2007]

Xdebug version 2.0.0RC3 has been released. This release fixes a number of bugs and should be the last release candidate before 2.0.0 is released. Now is your time to test!

[24-12-2006]

Xdebug version 2.0.0RC2 has been released. This release features many internal clean ups and bug fixes. Some issues with the newly introduced layout for stack traces where also addressed.

[08-10-2006]

Xdebug version 2.0.0RC1 has been released. This release includes some performance enhancing patches and fixes some problems in the previous beta releases. It also features a new layout for stack traces and features much better code-coverage support.

[30-06-2006]

Xdebug version 2.0.0beta6 has been released. This release includes some performance enhancing patches and fixes some problems in the previous beta releases.

[31-12-2005]

Xdebug version 2.0.0beta5 has been released. This release fixes some problems in the previous beta releases.

[29-11-2004]

Xdebug version 2.0.0beta2 has been released. This release fixes some problems in the beta1 release.

[15-09-2004]

Xdebug version 2 has finally reached beta status. We celebrate that with the release of 2.0.0beta1. For a full changelog, see the updates page.

[30-06-2004]

Xdebug version 1.3.2 has been released. This release will compile against the latest CVS of PHP 5 again.

[06-04-2004]

Xdebug version 1.3.1 has been released. This release just includes some small bugfixes:

• Fixed profiler to aggregate class/method calls correctly. (Robert Beenen)
• Fixed debugclient to initialize socket structure correctly. (Brandon Philips and David Sklar)
• GDB: Fixed bug where the source file wasn't closed after a "source" command. (Derick)

[01-04-2004]

Added archives for the Xdebug General and Xdebug Development mailinglists.

[28-12-2003]

Added the Xdebug license to this website.

[26-12-2003]

Xdebug version 1.3.0 has been released. Changes since 1.3.0rc1 includes numerous bugfixes and the addition of file/line information to signals. See the full Changelog to find out what's new.

[09-10-2003]

Together with Shane Caraveo from ActiveState a new protocol, DBGp, was developed. This will be implemented for Xdebug 2 and is a true multi-language protocol. This means that a client written for Xdebug 2 will also work in combination with the Perl, Python, Tcl and XSLT debuggers from Active State. For a description of (a draft) of this new protocol, see the documentation - protocol page. The development of the protocol is sponsored by Maguma and will also be implemented in Maguma Studio 2.

[18-09-2003]

Xdebug version 1.3.0rc1 has been released. This new version's main enhancements are the increased performance and additional commands for remote debugging (conditional breakpoints, "full" backtrace, show local variables) See the full Changelog to find out what's new.

[16-07-2003]

Xdebug version 1.3.0 will have greatly improved performance over older versions. Changing the folding (creating a string out of a variable) is now only done when it is required: when being in trace mode (started from xdebug_start_trace(), or on error. See the full Changelog for information on other improvements.

[21-04-2003]

Xdebug version 1.2.0 has been released. This release adds one extra function in comparison to 1.2.0rc2, xdebug_call_class(). See the full Changelog for more information.

[15-04-2003]

The second release candidate of Xdebug version 1.2.0 has been released. This RC fixes a few bugs in RC1. See the full Changelog for more information.

[06-04-2003]

Xdebug version 1.2.0rc1 has finally been released. This new version's main enhancements are the profiling support and code coverage. See the full Changelog to find out what's new.

[16-01-2003]

Xdebug supports Zend Engine 2! With the updated OO functionality in this new engine for PHP Xdebug wouldn't compile anymore, with this update it works again. Namespaces are not yet supported but will be implemented soon.