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Debugging PHP

Appendix F. Debugging PHP

About the debugger

PHP 3 includes support for a network-based debugger.

PHP 4 does not have an internal debugging facility. You can use one of the external debuggers though. The Zend IDE includes a debugger, and there are also some free debugger extensions like DBG at, the Advanced PHP Debugger (APD) or Xdebug which even has a compatible debugger interface as PHP 3's debugging functionality as is described in this section.