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; 19 months 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)

References

1. Rethans, Derick. "Release version 0.7.0". github. Retrieved 16 May 2020.
2. McArthur, Kevin (2008-03-24). "Testing, Development, and Continuous Integration". Pro PHP: Patterns, Frameworks, Testing and More. New York City, New York: Apress. pp. 120 – 124. ISBN 978-1-59059-819-1.
3. Sklar, David; Trachtenberg, Adam (2009-05-11). "Error Handling, Debugging, and Testing". PHP Cookbook (2nd ed.). Sebastopol, CA: O'Reilly Media. p. 618 – 619. ISBN 978-0-596-10101-5.
4. Henderson, Cal (2006-05-16). "Bottlenecks". Building Scalable Web Sites. Sebastopol, CA: O'Reilly Media. pp. 170 – 171. ISBN 0-596-10235-6.
5. Masters, Jon; Blum, Richard (2007-03-12). "LAMP". Professional Linux Programming. Hoboken, New Jersey: John Wiley & Sons. p. 426. ISBN 978-0-471-77613-0.
6. Gerner, Jason; Naramore, Elizabeth; Owens, Morgan L.; Warden, Matt (2005-12-05). "PEAR and PECL". In Gerner, Jason (ed.). Professional LAMP: Linux, Apache, MySQL and PHP Web Development. Hoboken, New Jersey: John Wiley & Sons. p. 197. ISBN 0-7645-9723-X.

External links

• Official website
• Xdebug in PECL
• Xdebug trace log visualization tool