Save & Share

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

use strict; my $str = 'test@email.com test-user@email.com test.user@email.com 33test33@email.com test99user-_22@email.com test@e.mail test@g.mail test AT email.com test AT email DOT com test AT email dot com test at email.com test@email DOT com this is not an email @twitterUser this is just an an string el@ Valid ------- first.last@iana.org 1234567890123456789012345678901234567890123456789012345678901234@iana.org x@x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x23456789.x2 1234567890123456789012345678901234567890123456789012345678@12345678901234567890123456789012345678901234567890123456789.12345678901234567890123456789012345678901234567890123456789.123456789012345678901234567890123456789012345678901234567890123.iana.org user+mailbox@iana.org customer/department@iana.org customer/department=shipping@iana.org cal(woo(yay)hoopla)@iamcal.com cal(foo\\@bar)@iamcal.com cal(foo\\)bar)@iamcal.com first(Welcome to&#13;&#10; the ("wonderful" (!)) world&#13;&#10; of email)@iana.org pete(his account)@silly.test(his host) c@(Chris\'s host.)public.example Invalid --------- first@...........com first.last@sub.do,com first\\@last@iana.org first.last .first.last@iana.org first.last.@iana.org "first"last"@iana.org """@iana.org first\\\\@last@iana.org Doug\\ \\"Ace\\"\\ Lovell@iana.org ()[]\\;:,><@iana.org test@. test@[123.123.123.123 test@123.123.123.123]'; my $regex = qr/(?<=\b)\w([\w\.\-_0-9])*(@| at )[\w0-9][\w\-_0-9]*((\.| DOT )[\w\-_0-9]+)+(?=\b)/mip; 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