Regular Expressions Cheat Sheets

The regular expression (regex or regexp for short) is a special text string for describing a search pattern. Regular expressions are often required to search for specific patterns, what so ever language you use. Usually we search for files in Windows Explorer using the string "*.txt", which means search all files having extension as "txt". The string "*.txt" is nothing but a regular expression. Regular expression has a wide variety of syntax to describe various operators like *, +, $, ^ etc. It is difficult to remember all these operators and their meanings, in such cases these cheat sheets become handy!

RegEx Cheat Sheets

.NET Regular Expressions Cheat Sheets

Perl Regular Expressions Cheat Sheet

Mysql Regular Expressions Cheat Sheet

Php Regular Expressions Cheat Sheets

Javascript Regular Expressions Cheat Sheet

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