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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace puck;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Controller  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $viewPath='';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $title = '';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $twig;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $tVar=array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $loader=new \Twig_Loader_Filesystem(BASE_PATH.$this->viewPath);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $twig=new \Twig_Environment($loader, array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'debug' => DEBUG,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            'cache' => BASE_PATH.'/cache',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        ));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->twig=$twig;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->initTwigFilter();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->initTwigFunction();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->db=\MysqliDb::getInstance();  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function initTwigFilter() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $filter=new \Twig_SimpleFilter('long2ip', 'long2ip'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->twig->addFilter($filter);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function initTwigFunction() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $function=new \Twig_SimpleFunction('I', 'I'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->twig->addFunction($function);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function show($tmpPath='')  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($tmpPath == '') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (defined("CONTROLLER_NAME") && defined("ACTION_NAME")) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $tmpPath=parse_name(CONTROLLER_NAME).'/'.parse_name(ACTION_NAME);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                show_json($this->tVar);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        header('Content-Type:text/html; charset=utf-8'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        header('Cache-control: private'); // 页面缓存控制 | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        header('X-Powered-By:ViviAnAuthSystem'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->assign('title', $this->title); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        echo $this->twig->render($tmpPath.'.'.TempExt, $this->tVar);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        die();  | 
            
                            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $name  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function assign($name, $value = '') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (is_array($name)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->tVar = array_merge($this->tVar, $name);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->tVar[$name] = $value;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    protected function model($modelName, $vars = []) { | 
            
            
                                                        
            
                                    
            
            
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                        return app($modelName . '_model', $vars);  | 
            
                            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                        
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: