Regular Expressions 101

Save & Share

  • Save Regex
    ctrl+s
  • Update Regex
    ctrl+⇧+s

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8

Function

  • Match
  • Substitution
  • List
  • Unit Tests
/
^P|!.3|w\^|^[^C\\|]+$|\.[)$-](?!.!)
/
gm
1st Alternative
^P
^ asserts position at start of a line
P matches the character P with index 8010 (5016 or 1208) literally (case sensitive)
2nd Alternative
!.3
! matches the character ! with index 3310 (2116 or 418) literally (case sensitive)
. matches any character (except for line terminators)
3 matches the character 3 with index 5110 (3316 or 638) literally (case sensitive)
3rd Alternative
w\^
w matches the character w with index 11910 (7716 or 1678) literally (case sensitive)
\^ matches the character ^ with index 9410 (5E16 or 1368) literally (case sensitive)
4th Alternative
^[^C\\|]+$
^ asserts position at start of a line
Match a single character not present in the list below
[^C\\|]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
C matches the character C with index 6710 (4316 or 1038) literally (case sensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case sensitive)
| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
$ asserts position at the end of a line
5th Alternative
\.[)$-](?!.!)
\. matches the character . with index 4610 (2E16 or 568) literally (case sensitive)
Match a single character present in the list below
[)$-]
)$-
matches a single character in the list )$- (case sensitive)
Negative Lookahead
(?!.!)
Assert that the Regex below does not match
. matches any character (except for line terminators)
! matches the character ! with index 3310 (2116 or 418) literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String