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

r"
"
gum

Test String

Code Generator

Language

Generated Code

use strict; my $str = '+33 100 000 0000 000-000-0000 000 000 0000 000.000.0000 12000-000-000012 12000 000 000012 12000.000.000012 0049-000-0000 000 000 0000 000.000.0000 (000)000-0000 (000)000 0000 (000)000.0000 (000) 000-0000 (000) 000 0000 (000) 000.0000 12(000)000-000012 12(000)000 000012 12(000)000.000012 12(000) 000-000012 12(000) 000 000012 12(000) 000.000012 000-0000 000 0000 000.0000 0000000 (100)0000000 12000-000012 12000 000012 12000.000012 12000000012 12(000)000000012 +28 100 000 0000 +33 000 000 0000 +33 100 000 0000 +49 100 000 0000 +43 100 000 0000 +43.100.000.0000 +43-100-000-0000 +43 100 000 0000 +43.100.000.0000 +43-100-000-0000 +433 100 000 0000 +433.100.000.0000 +433-100-000-0000 +433000000000 0043 1000000000 0043 100000000000023 0043 100000 0043 100000000 0043 100 00 00000 0043 100 000 0000 0043-100-000-0000 00431000000000 0000-000-000-0000 00000000000000 +43 (100)000 0000 0043 (100)000-0000 0043(100)000-0000 0000 (100)000-0000 0000(100)000-0000 +43 (100) 000 0000 0043 (100) 000-0000 0043(100) 000-0000 0000 (100) 000-0000 0000(100) 000-0000 +43 (10)000 0000 0043 (10)000-0000 0043(10)000-0000 0000 (10)000-0000 0000(10)000-0000 +43 (10) 000 0000 0043 (10) 000-0000 0043(10) 000-0000 0000 (10) 000-0000 0000(10) 000-0000 0662 874278 0676 7359567 0343545435343 06700000023 12+43 100 000 000012 12+43.100.000.000012 12+43-100-000-000012 12+43100000000012 120043 100000000012 120043-100-000-000012 120043100000000012 12+43 (100)000 000012 120043 (100)000-000012 120043(100)000-000012 +49 10 000000 (000) 0000-0000 (0000) 0000-0000 (00000) 000-0000 (030000) 00-0000 01200-0000000 0137-000 0000000 01500-0000000 0160-0000000 0170-0000000 032-000000000 0700-0000000 0800-0000000 0900-0-000000 0000000000000 0000000000000 120000000000000 120000000000000 +00+00 000 0000 2013 175000km 019 55000km'; my $regex = qr/(?:^|\s)(((?:\+|0{2})(?:49|43|33)[-\. ]?|0)([1-9]\d{1,2}[-\. ]?|\([1-9]\d{1,2}\)[-\. ]?)(\d{6,9}|\d{2,3}[-\. ]\d{4,6}))/ump; if ( $str =~ /$regex/g ) { print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n"; # print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n"; # print "Capture Group 2 is $2 ... and so on\n"; } # ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p' # Named capture groups can be called via $+{name}

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 Perl, please visit: http://perldoc.perl.org/perlre.html