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Special Characters Literal Characters Character Classes Replacement Anchors Repetition Options Look-Around and Advanced Expressions Grouping
[
\
^
$
.
|
?
{0,1}
*
+
(
)
\f
\n
\r
\t
\v
\a
\e
\xxx
xxx
\xnn
nn
\cX
Control-X
\cI
\cJ
[...]
[^...]
[^\n]
\w
[a-zA-Z0-9_]
[[:alnum:]_]
\W
[^a-zA-Z0-9_]
[^[:alnum:]_]
\s
[ \t\n\r\f\v]
[[:space:]]
\S
[^ \t\n\r\f\v]
[^[:space:]]
\w != \S
\d
[0-9]
[[:digit:]]
\D
[^0-9]
[^[:digit:]]
[\b]
[[:class:]]
class
alnum, alpha, ascii, blank, cntrl, digit, graph, lower, print, punct, space upper, xdigit
\(
\)
&
~
%
\b
\B
\u
\U
\l
\L
{n,m}
n
m
{n,}
{n}
{1,}
{0,}
{}?
??
+?
*?
^(.*?)\s*$
g
i
s
x
(?#abc)
abc
(?:abc)
(?=abc)
(?!abc)
(?imsx)
(...)
(?<name>...)
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