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What does page controller mean in php?

零下一度Original: 2017-06-23 13:17:102828browse

<?php/*页面控制器模式：按我的理解就是将业务逻辑和视图分离开来（通常最简便的写法是php和html代码是混合在一个文件里面的），
即一个业务逻辑文件对应一个视图文件。
    代码示例即注解如下:*///页面控制器模式namespace woo\controller;//业务逻辑文件 (文件名AddVenue.php)abstract class PageController {   //基类private $request;function __construct (){    $request = \woo\base\RequestRegistry::getRequest();        //通过注册表类获取一个处理用户请求信息的类if(is_null($request)){$request = new Request();
        }$this->request = $request;
    }    abstract function process();    function forward($resource){        //跳转include($resource);exit(0);
    }    function getRequest(){return $this->request;
    }
}class AddVenueController extends PageController { //这个类的作用就是向数据库写入一个venue数据(数据表结构类似:id,name)        function process(){try{$request = $this->getRequest();$name = $request->getProperty('venue_name');                //获取用户提交的venue的名称if(is_null($request->getProperty('submitted'))){            //判断是否表单提交,否的话跳转到add_nenue.php$request->addFeedback("choose a name for the venue");    $this->forward('add_nenue.php');                        
            } else if (is_null($name)){                                    //判断表单提交是否有name $request->addFeedback("name is a required field");    $this->forward('add_venue.php');                        //跳转add_venue.php            }        $venue = new \woo\domain\Venue(null,$name);                    //创建对象便可将它添加到数据库,具体内部的业务逻辑不必深究。$this->forward("ListVenues.php");                            //添加成功后跳转ListVenues.php,即一个列表数据的显示界面    } catch(Exception $e){$this->forward('error.php');                                //跳转到一个错误界面                    }
    }
}$controller = new AddVenueController();                                    //执行这个类的process()方法$controller->process();?>

<?php 
//视图文件 (文件名add_venue.php)require_once("woo/base/RequestRegistry.php");$request = \woo\base\RequestRegistry::getRequest();?>
<html>
<head>
<title>Add Venue</title>
</head>

<body>
    <h1>Add Venue</h1>
    <table>
    <tr>
        <td>
        <?php print $request->getFeedbackString('</td></tr><tr><td>')?>
        </td>
    </tr>
    </table>
    <form action="AddVenue.php" method="get">
        <input type="hidden" name="submitted" value="yes" />
        <input type="text" name="venue_name" />
    </form>
</body>
</html>

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