Regular Expressions 101

Save & Share

  • Regex Version: ver. 2
  • 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

/
/
gmi

Test String

Code Generator

Language

Generated Code

$re = '/{\s*file\s*:\s*["\']\s*(http[^"\']+\.mp4)/mi'; $str = '<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" /> <link href=\'https://fonts.googleapis.com/css?family=Hanuman\' rel=\'stylesheet\' type=\'text/css\'> <link href="https://fonts.googleapis.com/css?family=Scada" rel="stylesheet"> <link href="jwplayer-7.12.8/skins/prime.min2.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="jwplayer-7.12.8/jwplayer.js"></script> <script type="text/javascript">jwplayer.key="I9HOJrL1NmqruQ60as34wt34/23422dsdrwer==";</script> </head> <body> <div id="picasa" class="picasa"></div> <script type="text/javascript"> var playerInstance = jwplayer("picasa"); playerInstance.setup({ id:\'picasa\', controls: true, displaytitle: true, flashplayer: "//ssl.p.jwpcdn.com/player/v/7.12.5/jwplayer.flash.swf", width: "100%", height: "100%", aspectratio: "16:9", fullscreen: "true", provider: \'http\', autostart: false, image:\'http://localhost/viral/viralvideo.jpg\', sources: [{file:"http://localhost/srt/43534234/viral022018SD.MP4",label:"SD",type: "video/mp4"},{file:"http://localhost/srt/43534234/viral022018HD.MP4",label:"HD",type: "video/mp4",default: true}], sharing:{ link: "", code: "", heading: "Share", sites: ["facebook","twitter","tumblr","googleplus","reddit","linkedin","interest","email"], }, sharing:{ link: "", code: "", heading: "Share", sites: ["facebook","twitter","tumblr","googleplus","reddit","linkedin","interest","email"], }, tracks: [{ file: \'http://localhost/srt/viralvideo022018.srt\', label: \'English\', kind: \'captions\', "default":true }], captions: { color: \'#FFEB3B\', fontSize: 14, fontFamily: \'Scada, Hanuman, sans-serif, Verdana, cursive\', fontOpacity: 100, backgroundOpacity: 0, backgroundColor: \'#000000\', edgeStyle: \'raised\', windowColor: \'#000000\', windowOpacity: 0 }, skin: { name: \'prime\', }, }); </script> </body> </html>'; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

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 PHP, please visit: http://php.net/manual/en/ref.pcre.php