PHP 计算页面执行时间

PHP 计算页面执行时间

<?php
header("Content-Type:text/html;charset=utf-8");
class RunTime{

        public $StartTime = 0;
        public $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<10000; $i++){
        $a += $i;
}
//你的代码结束
$runtime->stop();
echo "页面执行时间: ".$runtime->spent()." 毫秒";
?>