RegExp

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JavaScript RegExp Example: Online Regular Expression Tester

REGex TESTER v1.5.3 - test/validate regular expressions, online tester

Visual REGEXP : a graphical explorer for your regexps

http://laurent.riesterer.free.fr/regexp/

Introduction

Rex V: an AJAX Regular EXpression eValuator

The regular expression, as a pattern, can match all kinds of text strings helping your application validate, compare, compute, decide etc.

http://www.roscripts.com/PHP_regular_expressions_examples-136.html

PHP regular expressions examples

Regular Expression Library

Regular Expressions: Methods - Doc JavaScript

<a href="http://o1.qnsr.com/cgi/r?

http://www.webreference.com/js/column5/methods.html