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

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)'controllers' => \[\s*\K('factories' => )(\[((?>[^][]++|(?2))*)])`) var 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; }, ], ], ];` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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 Golang, please visit: https://golang.org/pkg/regexp/