PHP site/script map with dependencies

Just inherited a large PHP 5.3 site and wondered if there were some sort 开发者_如何学编程of crawler or site map tool that would identify the files and their dependencies.

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You can determine PHP version and extension dependencies with PEAR's PHP_CompatInfo package. As for PEAR packages the app might be using, you can see what's installed using

pear list -a

I don't know of a tool that will tell you which external script dependencies are in use other than grep.