Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

~
~
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

re = /-\R/ str = '$text = " БАДРЎ(Й) (ي(بدرو он ки рўи нозебу хунук до- рад, бадафт, безеб, бадбашара; муќоб. хушрўй. БАДСОБИЌА بدسابقه он ки пешинаи хуб надо- рад ва мардум ўро ба бадї мешиносанд. БАДСУРАТ بدصورت бадшакл, бадафт, бад- андом; нозеб, зиштрўй. БАЙ-БАЙ بي بي нидо вањ-вањ, њай-њай (бо ало- мати тањсин ва тааљљуб). БЕСАРУНЎГЇ بيسرونوگي 1. бесарунўг будан, бетартибї, бесарусомонї. 2. чигилї, печи- дагї, дарњам-барњамї. а) бесаранљом, парешонњол; б) бетартиб, дарњаму барњам: бесару сомон шудани кор; бесару тан белибос; луч, урён, барањна; бе- сар-бесар гаштан худсарона овора гаштан. ";' subst = '\'\'' result = str.gsub(re, subst) # Print the result of the substitution puts result

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html