Perl Regular Expressions

Pattern	Result
.	Matches any character except newline
[a-z0-9]	Matches any single character of set
[^a-z0-9]	Matches any single character not in set
\d	Matches a digit, same as [0-9]
\D	Matches a non-digit, same as [^0-9]
\w	Matches an alphanumeric (word) character [a-zA-Z0-9_]
\W	Matches a non-word character [^a-zA-Z0-9_]
\s	Matches a whitespace character (space, tab, newline...)
\S	Matches a non-whitespace character
\n	Matches a newline
\r	Matches a return
\t	Matches a tab
\f	Matches a formfeed
\b	Matches a backspace (inside [] only)
\0	Matches a null character
\000	Also matches a null character because ...
\nnn	Matches an ASCII character of that octal value
\xnn	Matches an ASCII character of that hexadicimal value
\cX	Matches an ASCII control character
\metachar	Matches the character itself (\|,\.,\*...)
(abc)	Rembers the match for later backreferences
\1	Matches whatever the first set of parens matched
\2	Matches whatever the second set of parens matched
\3	and so on...
x?	Matches 0 or 1 x's, where x is any of the above
x*	Matches 0 or more x's
x+	Matches 1 or more x's
x{m,n}	Matches at least m x's but nore more than n
abc	Matches all of a, b, and c in order
fee|fie|foe	Matches one of fee, fie, or foe
\b	Matches a word boundry (outside [ ] only)
\B	Matches a non-word boundry
^	Anchors match to the beginning of a line or string
$	Anchors match to the end of a line or string