Regular Expressions 101

Save & Share

Flavor

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

Function

  • Match
  • Substitution
  • List
  • Unit Tests
/
\((([^)]+))\)\[(.*?)\]
/
g
\( matches the character ( with index 4010 (2816 or 508) literally (case sensitive)
1st Capturing Group
(([^)]+))
2nd Capturing Group
([^)]+)
Match a single character not present in the list below
[^)]
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
) matches the character ) with index 4110 (2916 or 518) literally (case sensitive)
\) matches the character ) with index 4110 (2916 or 518) literally (case sensitive)
\[ matches the character [ with index 9110 (5B16 or 1338) literally (case sensitive)
3rd Capturing Group
(.*?)
.
matches any character (except for line terminators)
*? matches the previous token between zero and unlimited times, as few times as possible, expanding as needed (lazy)
\] matches the character ] with index 9310 (5D16 or 1358) literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
g

Test String

Substitution

Processing...