Regular Expressions 101

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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

/
/
gm

Test String

Code Generator

Generated Code

use strict; my $str = '<?php namespace Application; use Laminas\\Router\\Http\\Literal; use Laminas\\Router\\Http\\Segment; use Laminas\\ServiceManager\\Factory\\InvokableFactory; return [ \'view_manager\' => [ \'template_path_stack\' => [ __DIR__ . \'/../view\', __DIR__ . \'/../view/Application/_shared\' ], ], \'controllers\' => [ \'factories\' => [ dsdsa ] ], \'service_manager\' => [ \'factories\' => [ \'UsersTableGateway\' => function ($sm) { $dbAdapter = $sm->get(\'Laminas\\Db\\Adapter\\Adapter\'); $resultSetPrototype = new \\Laminas\\Db\\ResultSet\\ResultSet(); //get base url from config $config = $sm->get(\'Config\'); $baseUrl = $config[\'view_manager\'][\'base_url\']; //pass base url via cnstructor to the User class $resultSetPrototype->setArrayObjectPrototype(new Model\\Rowset\\User($baseUrl)); return new Utils\\TableGateway(\'users\', $dbAdapter, null, $resultSetPrototype); }, \'Application\\Model\\UsersTable\' => function($sm) { $tableGateway = $sm->get(\'UsersTableGateway\'); $table = new Model\\UsersTable($tableGateway); return $table; }, Utils\\Authentication::class => function($sm) { $auth = new Utils\\Authentication( $sm->get(\\Laminas\\Db\\Adapter\\Adapter::class), $sm->get(Utils\\Adapter::class) ); return $auth; }, Utils\\Helper::class => InvokableFactory::class, SessionManager::class => function ($container) { $config = $container->get(\'config\'); $session = $config[\'session\']; $sessionConfig = new $session[\'config\'][\'class\'](); $sessionConfig->setOptions($session[\'config\'][\'options\']); $sessionManager = new Session\\SessionManager( $sessionConfig, new $session[\'storage\'](), null ); \\Laminas\\Session\\Container::setDefaultManager($sessionManager); return $sessionManager; }, ], ], ];'; my $regex = qr/'controllers' => \[\s*\K('factories' => )(\[((?>[^][]++|(?2))*)])/mp; 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