• php事件驱动

    1. [文件] class.Dispatcher.php ~ 967B     下载(9)     

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    <?php
    session_start();
    require_once('class.Handler_Event.php');
    header("Content-type:text/html; charset=utf-8");
     
    class Dispatcher{
        private $handle;
         
        function __construct($event_handle){
            $this->handle=$event_handle;
        }
         
        function handle_the_event(){
            $name="handler_$this->handle";
            if(class_exists("$name")){
                $handler_obj=new $name($this->handle);
                $response=$handler_obj->secure_handler();
                return $response;
            }else{
                echo "I can't handle this!";
            }
        }
    }
    ?>
    <html>
    <head><title>Secure,Event Driven Record Viewer!</title></head>
     
    <body>
    <form action="<? echo $_SERVER['PHP_SELF'] ?>" method="post">
       <input type="submit" name="event" value="View">
       <input type="submit" name="event" value="Edit">
    </form>
    </body>
    </html>
    <?php
    function handle(){
        $event=$_POST['event'];
        $do=new Dispatcher($event);
        $do->handle_the_event();
    }
     
    $_SESSION['name']="Wangzy";
     
    if(isset($_POST['event'])) handle();
    ?>

    2. [文件] class.Handler_Event.php ~ 1KB     下载(6)     

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    <?php
    //Event parent
    abstract class Event_Handler{
        function dbconn(){
            $link_id=mysql_connect("localhost","root","root");
            mysql_select_db("mytest",$link_id);
            mysql_query("set names utf8",$link_id);
            return $link_id;
        }
         
        abstract function handled_event();
        abstract function secure_handler();
    }
     
    //View Event
    class Handler_View extends Event_Handler{
        private $handle;
         
        function __construct($event_handle){
            $this->handle=$event_handle;
        }
         
        function handled_event(){
            echo "The event, $this->handle, is now handled.<br>
            It is ,I promise!<br><br>
            Your records are as follows:<br><br>";
             
            $id=parent::dbconn();
            $result=mysql_query("select * from table01",$id);
            while($row=mysql_fetch_array($result)){
                echo "Numbers:".$row['number']." Name:".$row['name']."<br>";
            }
        }
         
        function secure_handler(){
            if($_SESSION['name']=="Wangzy"){
                $this->handled_event();
            }else{
                echo "Sorry {$_SESSION['name']} you are not authorized!";
            }
        }
    }
     
    //Edit Event
    class Handler_Edit extends Event_Handler{
        private $handle;
         
        function __construct($event_handle){
            $this->handle=$event_handle;
        }
         
        function handled_event(){
            echo "This is event $this->handle, which is now handled -no kidding!<br>";
        }
         
        function secure_handler(){
            $this->handled_event();
        }
    }
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  • 原文地址：https://www.cnblogs.com/xiezhi/p/5640673.html
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