Regular Expression

Regular expressions is the term used for a codified method of searching invented or defined by the American mathematician Stephen Kleene. You can think of regular expressions as wildcards on steroids. Such as particular characters, words, or patterns of characters. A very similar regular expression can be used by a programmer, and you don't need to attention whether that code is written in Perl, PHP, Java, .Net language or a multitude of other languages.

For the detailed information from Internet, you can refer to the following links, include chinese and english verison.

English version:

Regular-Expressions.info(http://www.regular-expressions.info/)

Regular Expression--Wikipedia(http://en.wikipedia.org/wiki/Regular_expression)

Regular Syntax Summary(http://www.greenend.org.uk/rjk/2002/06/regexp.html)

Introduction to Regular Expressions(http://msdn.microsoft.com/en-us/library/28hw3sce.aspx)

Chinese version:

正则表达式--Wikipedia(http://zh.wikipedia.org/w/index.php?title=%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5%BC%8F&variant=zh-cn)

正则表达式参考文档(http://www.regexlab.com/zh/regref.htm)

正则表达式三十分钟入门教程(http://unibetter.com/deerchao/zhengzhe-biaodashi-jiaocheng-se.htm)