詳解PHP裝飾模式的範例程式碼

詳解PHP裝飾模式的範例程式碼

<?php  // 裝飾模式    function echoLine($msg) {        echo $msg, '<br/>';    }    class RequestHelper  {      /**      * return class resource id      */      public function toString()      {          ob_start();          var_dump($this);          $str = ob_get_clean();          if (preg_match('/object\(' . CLASS . '\)\#\d+/', $str, $matches)) {              return $matches[0];          }          return CLASS;      }  }    // ---------------------------------------------------------    interface ProcessRequest  {      public function process(RequestHelper $req);  }    /**  * http request  */  class HttpRequest implements ProcessRequest  {      public function process(RequestHelper $req)      {          echoLine('Process http request[' . $req . ']');      }  }    /**  * Log Decorator  * add log function  */  class LogRequest implements ProcessRequest  {      protected $pr;        public function construct(ProcessRequest $pr)      {          $this->pr = $pr;      }            public function process(RequestHelper $req)      {          echoLine('Add log function!');          $this->pr->process($req);      }  }    /**  * Authenticate Decorator  * add authenticate function  */  class AuthenticateRquest implements ProcessRequest  {      protected $pr;        public function construct(ProcessRequest $pr)      {          $this->pr = $pr;      }            public function process(RequestHelper $req)      {          echoLine('Add authenticate function!');          $this->pr->process($req);      }  }    // test code  $req = new RequestHelper();  $process = new HttpRequest();    // add log  $process = new LogRequest($process);  // add auth  $process = new AuthenticateRquest($process);    // process request  $process->process($req);