PHP 计算页面执行时间

PHP 计算页面执行时间

 < ?php

 class runtime

 {

     var $StartTime = 0;

     var $StopTime = 0;

     function get_microtime()

     {

         list($usec, $sec) = explode(' ', microtime());

         return ((float)$usec + (float)$sec);

     }

     function start()

     {

         $this->StartTime = $this->get_microtime();

     }

     function stop()

     {

         $this->StopTime = $this->get_microtime();

     }

     function spent()

     {

         return round(($this->StopTime - $this->StartTime) * 1000, 1);

     }

 }

 //例子

 $runtime= new runtime;

 $runtime->start();

 //你的代码开始

 $a = 0;

 for($i=0; $i&lt;1000000; $i++)

 {

     $a += $i;

 }

 //你的代码结束

 $runtime->stop();

 echo "页面执行时间: ".$runtime->spent()." 毫秒";

 ?>