<?php

class runtime

{

        var$StartTime=;

        var$StopTime=;

        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()

        {

                returnround(($this->StopTime -$this->StartTime) *,);

        }

}

//实例开始$runtime=new runtime;

$runtime->start();

//Start

//Here is your code

//End$runtime->stop();

echo"执行时间: ".$runtime->spent()." 毫秒";

?>