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";

 ?>