Xdebug

Xdebug is a PHP extension which provides debugging and profiling capabilities.^[2] It uses the DBGp debugging protocol.

Xdebug

An Xdebug error message on Wikimedia Commons
Developer(s)	Derick Rethans
Initial release	May 8, 2002 (2002-05-08)[1]
Stable release	3.2.1 / March 21, 2023; 2 years ago (2023-03-21)
Repository	github.com/xdebug/xdebug
Written in	C
Available in	English
Type	Debugger
License	Permissive license, derived from the MIT license
Website	xdebug.org

UML component diagram for Xdebug and PHP, integrated via the browser and an IDE

The debug information that Xdebug can provide includes the following:

• stack and function traces in error messages^[3] 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^[4]
• code coverage analysis
• capabilities to debug your scripts interactively with a debugger front-end.^[5]

Xdebug is also available via the PECL.^[6]

See also

• Free and open-source software portal

• Debugger
• Dynamic program analysis
• Software performance analysis
• Optimization
• DBG (another open source PHP debugger)
• Zend Studio (the Zend Debugger is an alternative to Xdebug)