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

/
/
gmi

Test String

Code Generator

Language

Generated Code

use strict; my $str = '[II DUO: Blue Coral Ring] 14,479,777 Silver(Marketplace Registration Queue) (11:17) [I PRI: Blue Coral Ring] 14,479,777 Silver(Marketplace Registration Queue) (11:17) [Blue Coral Earringssss] sold to Kasumizu through a pre-order. (11:16) [V PEN: Blue Coral Earringssss] sold to Kasumizu through a pre-order. (11:16) [Blue Coral Earring] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [+5 Steel Combat Champron] 4,924,197 Silver(Marketplace Registration Queue) (11:15) [Blue Coral Earring] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [[Ranger] Blue Coral Earring] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [+5 Steel Combat (nampron] 4,924,197 Silver(Marketplace Registration Queue) (11:15) [+15 Vuria snortsword of Crimson Flame] 14,348,172 Silver(Marketplace Registration Queue) (11:10) [Blue Coral Earring] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [[Berserker] Cavaro Clasic Set] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [Blue Coral Earring] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [Blue Coral Earring] 4,999,999 Silver(Marketplace Registration Queue) (11:16) [Ring of Crescent Guardian(30 days)] 49,559,233 Silver(Marketplace Registration Queue) (11:16) [Basilisk\'s Belt] 74,999,999 Silver(Marketplace Registration Queue) (11:16) [Sharp Black Crystal Shard] 3,699,999 Silver(Marketplace Registration Queue) (11:16) [Liverto Amulet] 8,999,999 Silver(Marketplace Registration Queue) (11:16) [Liverto Amulet] 8,999,999 Silver(Marketplace Registration Queue) (11:16) [snarp Black Crystal snard] 3,699,999 Silver(Marketplace Registration Queue) (11:16) [Liverto Amulet] 8,999,999 Silver(Marketplace Registration Queue) (11:16) [Liverto Amulet] 8,999,999 Silver(Marketplace Registration Queue) (11:16) [Basilisk\'s Belt] 74,999,999 Silver(Marketplace Registration Queue) (11:16) [Sharp Black Crystal Shard] 3,699,999 Silver(Marketplace Registration Queue) (11:16) [Forest Fury] 3,699,999 Silver(Marketplace Registration Queue) (11:16) [Blue Coral Earring] sold to Kasumizu through a pre-order. (11:16) [Sharp Black Crystal Shard] sold to Laforet through a pre-order. (11:16) [+15 Ultimate Agerian Shoes] 16,499,992 Silver(Marketplace Registration Queue) (11:16) [Black Magic Crystal - Cobelinus] 7,472,292 Silver(Marketplace Registration Queue) (11:16) [+15 Ultimate Agerian Gloves] 16,499,992 Silver(Marketplace Registration Queue) (11:16) [Mark of Shadow] 6,339,996 Silver(Marketplace Registration Queue) (11:17) [II DUO: Blue Coral Ring] 14,479,777 Silver(Marketplace Registration Queue) (11:17)'; my $regex = qr/(?:\[(?:(\+[0-9]{1,2}|(?:I PRI|II DUO|III TRI|IV TET|V PEN)):? )?(.*)\]) (?:([0-9,]*)).*?\(([0-9:]{5})\)/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