php---which tool i can use to trace a cms source code

now, if i want to trace the drupal sourcecode.how and which tool i can use to trace the drupal source code?i want to make a quick walk-through to drupal code. and want to trace it myself,but i don't know which good debugger 开发者_StackOverflow中文版i should use and how to trace it, thank you

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xdebug is an extension to PHP.

With it, you can get a Trace file every time a page is loaded, with a full list of every function called while rendering that page.

http://www.xdebug.org/docs/execution_trace

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Try Drupal for Firebug http://drupal.org/project/drupalforfirebug with firebug https://addons.mozilla.org/de/firefox/addon/1843/ as addon in firefox

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A quick and dirty way to find which methods was used and what values been passed until certain moment can be archived by outputting debug_backtrace()

like:

var_dump(debug_backtrace());

There are many IDE with integrated debuggers at most they work same way, as example above. You can try Eclipse or NetBeans for free or Zend Studio for a fee.

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Have you played much with the API Documentation? All of the core code is documented here, as well as providing a hyperlinked snapshot of the current HEAD for the particular major version you are browsing. One you get a good grasp of how hooks and templates work, tracing through code this way is mostly easy.