Javascript minification and shrinking variables with PHP

Question

I've been looking around SO for a JavaScript obfuscation script of some kind, note that I'm not looking for a compressor, I need an obfuscation script/code that will shrink the JavaScript files I have in PHP (not in JavaScript) for production reasons.

I've heard about Minify, I've used it a couple times, works great but it doesn't obfuscate my JS code, simply that is all I need to have, think like the Dean Edwards packer but without packing it, just the shrink variables mode in PHP instead of JS.

EDIT: My mistake, I understood "obfuscate" wrongly, I mean minification on the JS code - shrinking variable names and removing whitespace, etc. Minify is the closest I got to, but it does not shrink variables.

Is there one out there?

Answer 1

exec('java.exe -jar compiler.jar --js pre.js --manage_closure_dependencies true --js_output_file end.js');

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exec('java.exe -jar yuicompressor.jar pre.js  -o end.js');

use:

google closure compiler AND http://developer.yahoo.com/yui/compressor/