Regex quick reference

[abc] 	A single character: a, b or c
[^abc] 	Any single character but a, b, or c
[a-z] 	Any single character in the range a-z
[a-zA-Z] 	Any single character in the range a-z or A-Z
^ 	Start of line
$ 	End of line
\A 	Start of string
\z 	End of string
. 	Any single character
\s 	Any whitespace character
\S 	Any non-whitespace character
\d 	Any digit
\D 	Any non-digit
\w 	Any word character (letter, number, underscore)
\W 	Any non-word character
\b 	Any word boundary character
(...) 	Capture everything enclosed
(a|b) 	a or b
a? 	Zero or one of a
a* 	Zero or more of a
a+ 	One or more of a
a{3} 	Exactly 3 of a
a{3,} 	3 or more of a
a{3,6} 	Between 3 and 6 of a

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1 楼 xunzhaoyj 2010-11-26