如下所示：
复制代码 代码如下:
<?php
 $t = new executeTime;
 phpinfo();
 class executeTime{
     private $microtime;
     public function __construct(){
         $this->microtime = microtime(true);
     }          public function getNow(){
                 $this->__dectruct();
         }      public function __destruct(){
         if (empty($_SERVER["REQUEST_TIME_FLOAT"]))
             echo "<div style="color:#fff;background:#000;position:absolute;top:0px;right:0px;padding:3px 6px;">本次执行时间：", microtime(TRUE) - $this->microtime, "秒</div>";
         else
             echo "<div style="color:#fff;background:#000;position:absolute;top:0px;right:0px;padding:3px 6px;">本次执行时间：", microtime(TRUE) - $_SERVER["REQUEST_TIME_FLOAT"], "秒</div>";
     }
 }