Xdebug – extension for PHP to aid debugging and development

Xdebug is an extension for PHP to assist with debugging and development.

It provides step-debugging and a whole range of development aids, such as stack traces, a code profiler, features to dump the full execution of your script to a file, and more.

Xdebug is free and open source software.

Features include:

  • Contains a single step debugger to use with IDEs.
  • Upgrades PHP’s var_dump() function.
  • Adds stack traces for Notices, Warnings, Errors and Exceptions.
  • Features functionality for recording every function call and variable assignment to disk.
  • Contains a profiler.
  • Provides code coverage functionality for use with PHPUnit.

The debug information that Xdebug can provide includes the following:

  • Stack 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 scripts interactively with a debugger front-end.

Support: Documentation, GitHub Code Repository
Developer: Derick Rethans
License: The Xdebug License, derived from the MIT license (open source)

Xdebug is written in PHP and C. Learn PHP with our recommended free books and free tutorials. Learn C with our recommended free books and free tutorials.

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