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@ 2014-06-02T21:58:11Z

<?php

function roleDFSOnePrivilege(Role\RoleInterface $role, Resource\ResourceInterface $resource = null, $privilege = null)
    {
        if (null === $privilege) {
            throw new Exception\RuntimeException('$privilege parameter may not be null');
        }

        $dfs = array(
            'visited' => array(),
            'stack'   => array()
        );

        if (null !== ($result = roleDFSVisitOnePrivilege($role, $resource, $privilege, $dfs))) {
            return $result;
        }

        // This comment is needed due to a strange php-cs-fixer bug
        while (null !== ($role = array_pop($dfs['stack']))) {
            if (!isset($dfs['visited'][$role->getRoleId()])) {
                if (null !== ($result = $roleDFSVisitOnePrivilege($role, $resource, $privilege, $dfs))) {
                    return $result;
                }
            }
        }

        return null;
    }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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