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

/
/
gi

Test String

Code Generator

Language

Generated Code

re = /([\d]{1,2})\s+([\w]+)\s+([\d]{4})\s+-\s+([\d]{1,2})\s+([\w]+)\s+([\d]{4})\s+([\d]{1,2})\s+N[a,ä]chte\s+([.\s\S]+)\s+DERTOUR/i str = 'Mit freundlichen Grüßen i.A. Center Parcs Europe N.V. Tel.: 0221-97303042 Fax: 0221-97303019 EMail: dertour@groupepvcp.com Vertragspartner: Center Parcs Europe N.V.; Korrespondenzadresse: Kaltenbornweg 1-3, 50679 Köln Geschäftsführer: Pascal R.L. Ferracci, Mark David Haak Wegmann Von: ltr-staedte.fra@dertouristik.com <ltr-staedte.fra@dertouristik.com> Gesendet: Montag, 4. Juli 2016 14:07 An: PVCP, Dertour Betreff: ADVISING=2016/07/04, SeqNo=738, RefNo=201607042684 CPNK§ Center Parcs Nordseeküste GmbH Attn.: Frau Schwamborn Kaltenbornweg 1-3 D-50679 Köln BRV10888 Center Parcs Park Nordseeküste -- OK gebucht -- DER-REF.: 671509446-3 RES-DAT.: 04 JUL 2016 Personen: 6 Erw. Kopie 01 X BK792 ( EUR 917.60 ) 08 JUL 2016 - 15 JUL 2016 7 Nächte Bestätigt nach Anfrage Frau MENTHE/URSULA Herr MENTHE/CHRISTOPH Herr MENTHE/HEIKO Frau MENTHE/CHRISTINA Kind MENTHE/SILJA (08) Kind MENTHE/JANDRIK (04) BRV10888 Center Parcs Park Nordseeküste -- Bitte stornieren -- DER-REF.: 671509446-2 RES-DAT.: 29 JUN 2016 Personen: 6 Erw. Kopie: kein komplettes Storno - nur Umbuchung auf Termin 08.-15.07. 01 X BK792 ( EUR 1,359.20 ) 08 JUL 2016 - 18 JUL 2016 10 Nächte Freesale Frau MENTHE/URSULA Herr MENTHE/CHRISTOPH Herr MENTHE/HEIKO Frau MENTHE/CHRISTINA Kind MENTHE/SILJA (08) Kind MENTHE/JANDRIK (04) DERTOUR GmbH & Co. KG Erlebnisparks FAX: 069/9588-5122 ++ ENDE AVIS ++' # 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