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

/
/
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"href=""(http.+appl(?:y|ica).*?)"""; string input = @"<div> <p>Erste Fragen beantwortet Ihnen gerne Elcin Rabatli-Klappenberger unter <a href=""tel:+49/839868144""><span class=""brand-color text-bold"">0891/898568144</span></a>.</p> <p>Bewerben können Sie sich einfach mit Ihrem Lebenslauf über unsere <a href=""https://www.pisegxel.de/java-spring-jee-softwareentwickler-architekt-muenchen"" target=""_blank""> <p>Informationen über uns und zum Bewerbungsablauf finden Sie unter <a href=""https://www.isg.com/jobs/applications/applyForJobEntry.jsf?inseratnummer=83115&refererId=37"" target=""_blank""><span class=""brand-color text-bold"">www.pisegxel.de</span></a></p> <span class=""brand-color text-bold"">&gt;&gt;&gt; 1-Klick Bewerbung</span></a> oder per Email über <a href=""mailto:jobs@pisdgexel.de""><span class=""brand-color text-bold"">jobs@pissegxel.de</span></a></p> <p><span class=""brand-color text-bold"">Informationen zum Ablauf in Bezug auf COVID 19: </span><br /> <a href=""https://www.pisegxel.de/application/java-spring-jee-softwareentwickler-architekt-muenchen"" target=""_blank""> Vorstellungsgespräche können via Videokon&#173;fe&#173;renz geführt werden. Alternativ ist bei Präsenzterminen die Einhaltung der Hygienevorschriften gewährleistet.<br /> <a href=""https://www.pisegxel.de/apply/form?job=333&test=2"" target=""_blank""> <strong><em>Wir freuen uns auf Ihre Bewerbung!</em></strong> </p> </div>"; foreach (Match m in Regex.Matches(input, pattern)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx