Regular Expressions 101

Save & Share

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

/
/

Test String

Code Generator

Language

Generated Code

$re = '/(<h5\>Atores<\/h5\>\s*)/'; $str = '<div id="left-stack"> <div parental-rating="1" rating-movie="200,br-movie" class="lockup product movie video"> <a href="https://itunes.apple.com/br/movie/alem-da-escuridao-star-trek/id643978126"> <div class="artwork"> <img width="151" height="227" alt="Além da Escuridão: (Star Trek Into Darkness)" src-swap-high-dpi="http://a5.mzstatic.com/us/r30/Video69/v4/6a/7e/3a/6a7e3afe-fa95-e281-84e6-51c532b5b425/poster454x454.jpeg" src-load-auto-after-dom-load="" src-swap="http://a4.mzstatic.com/us/r30/Video69/v4/6a/7e/3a/6a7e3afe-fa95-e281-84e6-51c532b5b425/poster227x227.jpeg" class="artwork" src="https://s.mzstatic.com/htmlResources/3953/frameworks/images/p.png" /> <meta itemprop="image" content="http://a4.mzstatic.com/us/r30/Video69/v4/6a/7e/3a/6a7e3afe-fa95-e281-84e6-51c532b5b425/poster227x227.jpeg"></meta></div></a> <a onclick="return its.detect.openItunes(&#39;https://itunes.apple.com/br/movie/alem-da-escuridao-star-trek/id643978126&#39;);" href="#" class="action view-in-itunes"><span>Ver no iTunes</span></a> <ul class="list"> <li><span itemscope itemtype="http://schema.org/Offer" itemprop="offers" class="price"><span itemprop="price" content="USD 19.99">USD 19.99</span></span></li> <li class="genre"><span class="label">Gênero: </span><a href="https://itunes.apple.com/br/genre/filmes-ficcao-cientifica-e/id4413"> <span itemprop="genre">Ficção científica e fantasia</span></a></li> <li class="release-date"><span class="label">Lançado: </span><span itemprop="dateCreated" content=" 17/05/2013">2013</span></li><li class="copyright">© 2013 Paramount Pictures Corporation. All Rights Reserved.</li></ul> </div>'; preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0); // Print the entire match result var_dump($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