Perl Mode
Grouping
-
(
-
Start a group or back reference.
-
(?:
-
Pure grouping only.
-
(?=
-
Grouping with a positive lookahead.
-
(?!
-
Grouping with a negative lookahead.
-
(?i
-
Grouping with case-insensitive matching.
-
(?m
-
Grouping with multi-line matching.
-
(?s
-
Grouping with single line matching.
-
(?x
-
Grouping with free formatting.
-
(?#
-
Grouping comment.
-
|
-
Alternate (or) - a|b|c matches either a or b or c.
-
)
-
End a group or back reference.
Quantifiers
-
{
-
Start Min required, Max allowed set.
-
,
-
Insert comma - {min,max} separator.
-
}
-
End greedy Min required, Max allowed set.
-
}?
-
End non-greedy Min required, Max allowed set.
-
.
-
Match anything except the newline character.
-
?
-
Greedy one match allowed, but its optional.
-
*
-
Greedy zero or more matches allowed.
-
+
-
Greedy one match required, additional are optional.
-
??
-
Non-greedy one match allowed, but its optional.
-
*?
-
Non-greedy zero or more matches allowed.
-
+?
-
Non-greedy one match required, additional are optional.
Anchors
-
^
-
Insert start of line anchor.
-
\b
-
Insert a word anchor.
-
\B
-
Insert a non-word anchor.
-
\A
-
Insert a start of string anchor.
-
$
-
Insert end of line anchor.
-
\Z
-
Insert an end of string anchor.
-
\G
-
Insert an end of previous match anchor.
Modification
-
\l
-
Lower the case of the next character.
-
\u
-
Raise the case of the next character.
-
\L
-
Lower the case of text until optional \E.
-
\U
-
Raise the case of text until optional \E.
-
\Q
-
Add an escape before all non-alpha until \E.
-
\u\L
-
Capitalize first character, lower the rest until \E.
-
\l\U
-
Lowercase first character, raise the rest until \E.
-
\E
-
Insert an end mark for text modification.
Classes
-
.
-
Match anything except the newline character.
-
[
-
Start a character class.
-
[^
-
Start a negated character class.
-
]
-
Close a character class.
-
-
-
Create a character range like a-h.
-
a-z
-
Lowercase letter group.
-
A-Z
-
Uppercase letter group.
-
0-9
-
Match any digit group.
Variables
-
$_
-
Insert the default search target.
-
$1
-
Variable which stores the 1st matched text.
-
$2
-
Variable which stores the 2nd matched text.
-
$3
-
Variable which stores the 3rd matched text.
-
$+
-
Highest filled of $1, $2, ...
-
$`
-
Text before the match.
-
$&
-
Text of the match.
-
$'
-
Text after the match.
Operator
-
=~
-
Insert a target of regular expression operator.
-
!~
-
Insert a target of regular expression operator.
-
m/
-
Insert the match regular expression operator.
-
s/
-
Insert the substitute regular expression operator.
-
/
-
Used with m/ and s/, or anything you need it for.
-
split(
-
Split regular expression operator.
-
)
-
Close up the split operator.
-
/x
-
Remove comments and whitespace from regex.
-
/o
-
Compile regex just once.
-
/s
-
Single line mode for ^ and $.
-
/m
-
Multi-line match mode.
-
/i
-
Perform a case insensitive match.
-
/g
-
Modify the starting position of the match.
-
/e
-
Equivalent to placing eval{..} on substitution s/ / /.
-
#
-
Insert a comment marker.
Shorthand
-
\b
-
Match the backspace character.
-
\t
-
Match the tab character.
-
\n
-
Match the newline character.
-
\r
-
Match the carriage return.
-
\f
-
Match the form-feed character.
-
\a
-
Match the alarm (bell) character.
-
\e
-
Match the escape sequence character.
-
\o
-
Match character specified by the octal number o.
-
\x
-
Match character specified by the hex number x.
-
\c
-
Match the control character specified by char.
-
\w
-
Shorthand for a word - [a-zA-Z0-9_].
-
\W
-
Inverse of \\w.
-
\s
-
Shorthand for whitespace - [ \f\n\r\t].
-
\S
-
Inverse of \s.
-
\d
-
Shorthand for digits - [0-9].
-
\D
-
Inverse of \d.
Index