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Hi. I'm Dave, the internet addict behind FeedbackFair, Cheatography and Envoy.

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Cheat Sheets

Regular Expressions (V2)

Regular Expressions Cheat Sheet (V2)

The second version of the Regular Expressions Cheat Sheet, a quick reference guide for regular expressions, including symbols, ranges, grouping, assertions and some sample patterns to get you started.

Regular Expressions (V1)

Regular Expressions Cheat Sheet (V1)

Regular Expressions are very powerful, and many people find their unusual syntax hard to get to grips with. This A4 reference serves as a guide to regular expression patterns and options.

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Blog and Lab

Email Address Validation

How to validate email addresses according to ISO standards with PHP.

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01 June 2004   |   200 comments   |   code, development, email, php, programming, regex, regexp, security, tutorial, validation, webdesign