Regular Expressions 101

Save & Share

  • Current Version: 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to 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
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
Processing...

Test String

Code Generator

Language

Generated Code

$re = '/(?<OpenTag>[\<]+td[\>]+)(?<Contents>[\w\/\(\)\[\]\.\&\:\;\s]*?)(?<CloseTag>[\<]+[\/]+[td]+[\>]+)/m'; $str = '<br /> <span class="RptTitle"><input id="chkPromisDataLog" type="checkbox" name="chkPromisDataLog" checked="checked" onclick="showOnOffPromisLog();" /><label for="chkPromisDataLog">Promis Processing data log [83508442.1].</label></span> <div id="divPromisDataLog" style="display: none;"> <table id="tblPromisDataLog" cellspacing="0" cellpadding="0" width="100%" border="0" class="table"> <tr> <td width="60%"></td> <td> <a class="textnormal" href="javascript:popwnd=window.open(\'../Tools/ExportExcel.aspx?KEY=LOT_GEN_PROMIS\',\'popwnd\',\'status=no,toolbar=Yes,menubar=Yes,location=no,scrollbars=yes,resizable=Yes\');popwnd.focus()"> Export to Excel </a> </td> </tr> <tr> <td colspan="2"> <table cellspacing="0" rules="all" border="1" id="dgPromisDataLog" style="border-color: Black; border-collapse: collapse;"> <tr class="rptDetailsHeaderMgt" align="center"> <td>LotID</td> <td>Hist Stage</td> <td>Datein</td> <td>Dateout</td> <td>Qtyin</td> <td>Qtyout</td> <td>M/C ID</td> <td>Emp TrackOut</td> <td>Hold Code</td> <td>Hold Reason</td> <td>Staging (Hrs)</td> </tr> <tr class="rptDetailsItemMgt" align="center" style="white-space: nowrap;"> <td>83508442.1</td> <td> <a href="javascript:popwnd=window.open(\'LotGen_Dtl.aspx?iDate=04/09/2021 09:07:07 PM&amp;amp;oDate=04/10/2021 03:47:59 PM&amp;amp;oLotid=83508442.1&amp;amp;oStage=C-WFRPROCS&amp;amp;oLastRow=N\',\'popwnd\',\'width=900,height=600,status=no,toolbar=no,menubar=no,location=no,scrollbars=yes,top=100,right=50,left=50\');popwnd.focus();" > C-WFRPROCS </a> </td> <td>4/9/2021 9:07:07 PM</td> <td>4/10/2021 3:47:59 PM</td> <td>0</td> <td>9</td> <td></td> <td>10911700</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>18.68</td> </tr> </table> </td> </tr> </table> </div>'; preg_match_all($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