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Regular Expressions Cheat Sheets

Cost: Free, links back
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Whether you're searching strings or validating input fields, the use of regular expressions will save you a great deal of time. I found a great cheat sheet from that should save you a great deal of time. It's a free PDF download, so get to it!

By the way, if you'd like to watch a video tutorial that gives a crash-course in using regular expressions, be sure to pay a visit to the ThemeForest Blog. While you're there, you might as well subscribe to the RSS feed to stay updated on the latest articles and video tutorials!

Cheat Sheet
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