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

`
`
gm

Test String

Code Generator

Language

Generated Code

re = /(?s:(<a href="onebook\.php\?novelid=([\d]+?)".*?>(.*?)<\/a>.*?center">(.+?)<.*?center">(.+?)<.*?<td align="right">([\d]+?)<.*?<td align="right">([\d]+?)<\/td>))/m str = '<table width="986" border="0" align="center" cellpadding="0" cellspacing="0" class="cytable"> <tbody> <tr> <td width="126" class="sptd">作者</td> <td width="278" class="sptd">作品</td> <td width="168" class="sptd">类型</td> <td width="71" class="sptd">风格</td> <td width="63" class="sptd">进度</td> <td width="63" class="sptd">字数</td> <td width="73" class="sptd">作品积分</td> <td width="138" class="sptd">发表时间</td> </tr> <tr> <td align="left"> <a href="oneauthor.php?authorid=385748" target="_blank">君sola</a> </td> <td align="left"> <a href="onebook.php?novelid=1473506" target="_blank" title="简介：腹黑冰山美御姐与温柔黑化姑娘&#10;标签：">探虚陵现代篇</a> </td> <td align="center"> 原创-百合-近代现代-爱情 </td> <td align="center"> 正剧 </td> <td align="center"> 连载中 </td> <td align="right">2996549</td> <td align="right">9653954560</td> <td align="center">2012-03-21 11:25:31</td> </tr> <tr> <td align="left"> <a href="oneauthor.php?authorid=1696863" target="_blank">酒暖春深</a> </td> <td align="left"> <a href="onebook.php?novelid=4170491" target="_blank" title="简介：为生者权，替死者言&#10;标签：">我亲爱的法医小姐</a> </td> <td align="center"> 原创-百合-近代现代-悬疑 </td> <td align="center"> 正剧 </td> <td align="center"> <font color=\'red\'>已完成</font> </td> <td align="right">878082</td> <td align="right">3881133568</td> <td align="center">2019-08-29 20:00:00</td> </tr> ' # Print the match result str.scan(re) do |match| puts match.to_s end

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