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

Code Generator

Language

Generated Code

re = />(\d{4}\.\d{1,2}\.\d{1,2})<|>(\d+)</ str = '<table class="m_4348561758375603924m_886074067026015045MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="408" style="width:306.0pt;border-collapse:collapse"> <tbody> <tr style="height:31.5pt"> <td width="196" nowrap style="width:147.0pt;border:solid windowtext 1.0pt;background:yellow;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt"> <p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:24.0pt;font-family:宋体;color:black">Date<u></u><u></u></span></b></p> </td> <td width="212" nowrap style="width:159.0pt;border:solid windowtext 1.0pt;border-left:none;background:yellow;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt"> <p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:24.0pt;font-family:宋体;color:black">Reset Code<u></u><u></u></span></b></p> </td> </tr> <tr style="height:31.5pt"> <td width="196" nowrap style="width:147.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt"> <p class="MsoNormal" align="left" style="text-align:left"><strong><span lang="EN-US" style="font-size:24.0pt;font-family:宋体;color:black">2017.8.10<u></u><u></u></span></strong></p> </td> <td width="212" nowrap style="width:159.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt"> <p class="MsoNormal" align="left" style="text-align:left"><strong><span lang="EN-US" style="font-size:24.0pt;font-family:宋体;color:black">123456<u></u><u></u></span></strong></p> </td> </tr> <tr style="height:31.5pt"> <td width="196" nowrap style="width:147.0pt;border:solid windowtext 1.0pt;border-top:none;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt"> <p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:24.0pt;font-family:宋体;color:black">2017.8.11<u></u><u></u></span></b></p> </td> <td width="212" nowrap style="width:159.0pt;border-top:none;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;padding:0cm 5.4pt 0cm 5.4pt;height:31.5pt"> <p class="MsoNormal" align="left" style="text-align:left"><strong><span lang="EN-US" style="font-size:24.0pt;font-family:宋体;color:black">123456<u></u><u></u></span></strong></p> </td> </tr> </tbody> </table>' # 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