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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace app\modules\backend;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link http://www.diemeisterei.de/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright Copyright (c) 2014 diemeisterei GmbH, Stuttgart  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * For the full copyright and license information, please view the LICENSE  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * file that was distributed with this source code.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use yii\helpers\ArrayHelper;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Class Module.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Tobias Munk <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Module extends \yii\base\Module  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getMenuItems()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $menuItemPresets = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'admin' => ['label' => '<i class="fa fa-dashboard"></i> <span>Dashboard</span>', 'url' => ['/admin']],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'user' => ['label' => '<i class="fa fa-users"></i> <span>Users</span>', 'url' => ['/user/admin']],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'packaii' => ['label' => '<i class="fa fa-cubes"></i> <span>Packages</span>', 'url' => ['/packaii']],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'gii' => ['label' => '<i class="fa fa-code"></i> <span>Code Generation</span>', 'url' => ['/gii']],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $autoMenuItems = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach (\Yii::$app->getModules() as $name => $m) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            switch ($name) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                case 'admin':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                case 'user':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                case 'packaii':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                case 'gii':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $menuItems[] = $menuItemPresets[$name];  | 
            
                            
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                                    break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                default:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $module = \Yii::$app->getModule($name);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $autoMenuItems[] = [  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                        'label' => '<i class="fa fa-cube"></i> <span>'.ucfirst($name).'</span>',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                        'url' => ['/'.$module->id],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    ];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $menuItems = ArrayHelper::merge($menuItems, $autoMenuItems);  | 
            
                            
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                        return $menuItems;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    public function getControllers($module = null)  | 
            
            
                                                        
            
                                    
            
            
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                    { | 
            
            
                                                        
            
                                    
            
            
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                        if ($module === null) { | 
            
            
                                                        
            
                                    
            
            
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                            $module = \Yii::$app;  | 
            
            
                                                        
            
                                    
            
            
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                        } else { | 
            
            
                                                        
            
                                    
            
            
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                            $module = \Yii::$app->getModule($module);  | 
            
            
                                                        
            
                                    
            
            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        foreach (scandir($module->getControllerPath()) as $i => $name) { | 
            
            
                                                        
            
                                    
            
            
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                            if (substr($name, 0, 1) == '.') { | 
            
            
                                                        
            
                                    
            
            
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                                continue;  | 
            
            
                                                        
            
                                    
            
            
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                            }  | 
            
            
                                                        
            
                                    
            
            
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                            $controllers[] = \yii\helpers\Inflector::camel2id(str_replace('Controller.php', '', $name)); | 
            
                            
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                        }  | 
            
            
                                                        
            
                                    
            
            
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                        return $controllers;  | 
            
                            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.