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Xdebug is an extension for PHP, and provides a range of features to improve the PHP development experience.

Step Debugging

A way to step through your code in your IDE or editor while the script is executing.

Improvements to PHP's error reporting

An improved var_dump() function, stack traces for Notices, Warnings, Errors and Exceptions to highlight the code path to the error

Tracing

Writes every function call, with arguments and invocation location to disk. Optionally also includes every variable assignment and return value for each function.

Profiling

Allows you, with the help of visualisation tools, to analyse the performance of your PHP application and find bottlenecks.

Code Coverage Analysis

To show which parts of your code base are executed when running unit tests with PHPUnit.

Projects

• #001. Native Xdebug Path Mapping
  101.8 % Raised

See all projects

Announcements

• 2026-09-08 - Xdebug 3.6.0alpha1 is out!
• 2026-06-08 - Xdebug 3.5.3 is out!
• 2026-02-03 - Xdebug 3.5.1 is out!

See all announcements

Xdebug Cloud is a Proxy-as-a-Service, which can help you with complexities with regards to networking. A common use case is having multiple developers, who share a common development server on private network, while working in a remote location.

» Xdebug Cloud Website

Xdebug is made possible through the generous support of Xdebug's business-tier sponsors:

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  JT Web Development
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  IO Belgium
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  b13
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You can also be listed as a supporter by signing up for a Business package.