Regular Expressions 101

Save & Manage Regex

  • Current Version: 1
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests
Sponsors
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
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

const regex = /(http(?:s)?:\/\/)((?:(?:\w+)\.?)+\/)(vtvnpvr\S{0,10}\/sdash\/)(.*)(CUP|TDT)(\S{1,3})(\/\S{4,100})((\?)|(&)device)=(\S{1,5})_(\S{1,5})_(\S{1,100})/; // Alternative syntax using RegExp constructor // const regex = new RegExp('(http(?:s)?:\\\/\\\/)((?:(?:\\w+)\\.?)+\\\/)(vtvnpvr\\S{0,10}\\\/sdash\\\/)(.*)(CUP|TDT)(\\S{1,3})(\\\/\\S{4,100})((\\?)|(&)device)=(\\S{1,5})_(\\S{1,5})_(\\S{1,100})', '') const str = `http://vfccastcdn.gb.vodafone.es/vtvnpvr2/sdash/LIVE%24TDT001/2.mpd/Manifest?start=2018-11-20T16:55:00Z&end=2018-11-20T19:30:00Z&device=DASH_VTV_ENC_NPVR http://vfccastcdn.gb.vodafone.es/vtvnpvr/shss/LIVE%24CUP156/2.ism/Manifest?start=2018-11-20T16:55:00Z&end=2018-11-20T19:30:00Z&device=HSS_OTT_ENC_NPVR http://vfvtvcdn.gb.vodafone.es/shss/LIVE\$CUP156/2.ism/Manifest?start=2018-02-20T16:00:00Z&end=2018-02-20T17:00:00Z&device=HSS_VTV_AVC_ENC_RB_HD `; const subst = `$1vfott2cdn.gb.vodafone.es/$3$4CUP$6$7$8=$11_XDSL_$13`; // The substituted value will be contained in the result variable const result = str.replace(regex, subst); console.log('Substitution result: ', 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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions