正则表达式语法

http://www.pstips.net/regex-describing-patterns.html

以下是几个在线的正则表达式验证器:

1. Rubular

Rubular is a Ruby-based regular expression editor. It’s a handy way to test regular expressions as you write them.
Definitely my favorite!

1. Regex101

Online regex tester, debugger with highlighting for PHP, PCRE, Python and JavaScript that highlights pattern and matches on the fly. Features regex quiz and IRC chat box.

1. reFiddle

A tool for generating and testing regular expressions.

1. RegexPal

A JavaScript regular expression tester.

1. Regex Hero

Regex Hero runs directly off of the Regex class library inside Silverlight. I will say that Silverlight is missing the RegexOptions.

1. liveregex.com

Online Regular Expression Tester that supports PHP, Ruby, Python, Javasript. Real-time result and permalink to share regex.

1. RegViz

RegViz is a tool for debugging JavaScript regular expressions in a visual way. Advanced highlighting helps you to understand the structure and purpose of a regular expression and to detect bugs therein.