I have inherited a moderately large PHP codebase. In order to better understand how it works, I d like to be able to print to logs a function or file trace whenever I hit a page, so I can correlate pages with source code. Are there any tools I can install? I have root on the server, and so have the ability to install anything as far as Apache or PHP add-ons goes.
I have heard about XDebug, but when reading up on installation, I ve discovered that it is not compatible with Zend Optimizer. Unfortunately, this codebase requires Zend Optimizer, so XDebug does not appear to be an option for me at this time.
I m developing under Linux.