解析错误：语法错误，意外' - ＆gt;' （T_OBJECT_OPERATOR）

Question

我收到以下错误：

Parse error: syntax error, unexpected '->' (T_OBJECT_OPERATOR) in localhost\websites\mvc-pattern\app\start\Starter.php on line 7

错误行已注明//this is the error line

这是我的代码：

<?php
        class Starter{
            protected $controller= 'Home';
            protected $method= 'index';
            protected $param= array();
            public function __construct(){
                $url=this->url();//this is the error line
                // prepare controller
                if(file_exists('../app/controllers/' . $url[0] . '.php')){
                    this->$controller= $url[0];
                    unset($url[0]);
                }

                require_once '../app/controllers/'. $controller. '.php';
                this->$controller= new this->$controller;

                //prepare method
                if(isset($url[1])){
                    if(method_exists($controller,$url[1])){
                        this->$method= $url[1];
                        unset($url[1]);
                    }
                }

                this->$param= $url ? array_values($url) : array();
                call_user_func_array([this->$controller,this->$method],this->$param);
                 }
            public function url(){
                $url= $_GET['url'];
                $url= explode('/',rtrim($url,'/'));
                return $url;
            }
        }

Answer 1

this是未定义的常量...常量不能用作对象。

            $url=this->url();//this is the error line

应为$this->url(); - 请注意$。您在其他多个地方也有同样的错误。