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
"
\| right \= (.*)\n\| name \= (.*)\n\| bottom \= (.*)\n\| top \= (.*)\n\| image \= (.*)\n\| left \= (.*)\n
"
gm
\| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
right
matches the characters right literally (case sensitive)
\= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
1st Capturing Group
(.*)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\n matches a line-feed (newline) character (ASCII 10)
\| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
name
matches the characters name literally (case sensitive)
\= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
2nd Capturing Group
(.*)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\n matches a line-feed (newline) character (ASCII 10)
\| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
bottom
matches the characters bottom literally (case sensitive)
\= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
3rd Capturing Group
(.*)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\n matches a line-feed (newline) character (ASCII 10)
\| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
top
matches the characters top literally (case sensitive)
\= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
4th Capturing Group
(.*)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\n matches a line-feed (newline) character (ASCII 10)
\| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
image
matches the characters image literally (case sensitive)
\= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
5th Capturing Group
(.*)
.
matches any character (except for line terminators)
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\n matches a line-feed (newline) character (ASCII 10)
\| matches the character | with index 12410 (7C16 or 1748) literally (case sensitive)
left
matches the characters left literally (case sensitive)
\= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
matches the character with index 3210 (2016 or 408) literally (case sensitive)
6th Capturing Group
(.*)
\n matches a line-feed (newline) character (ASCII 10)
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.

Regular Expression
No Match

r"
"
gm

Test String

Substitution

Processing...