Have you looked into using pre-existing cross-reference tools?

Searching Google for "xref for PHP" I got these hits that look interesting:

I then searched for "PHP cross reference" to turn up these additional ones:

It strikes me, though, that you may want a more general tool. OpenGrok comes to mind. So does LXR.

In reply to Re: Using perl for refactoring by mr_mischief
in thread Using perl for refactoring by OceanPerl

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