测试PHP代码和页面执行速度的类

<?php

class timer {

var $StartTime = 0;

var $StopTime = 0;

var $TimeSpent = 0;

function start(){

$this->StartTime = microtime();

}

function stop(){

$this->StopTime = microtime();

}

function spent() {

if ($this->TimeSpent) {

return $this->TimeSpent;

} else {

$StartMicro = substr($this->StartTime,0,10);

$StartSecond = substr($this->StartTime,11,10);

$StopMicro = substr($this->StopTime,0,10);

$StopSecond = substr($this->StopTime,11,10);

$start = floatval($StartMicro) + $StartSecond;

$stop = floatval($StopMicro) + $StopSecond;

$this->TimeSpent = $stop - $start;

return round($this->TimeSpent,8).'秒';

}

} // end function spent();

} //end class timer;

//$timer = new timer;//实例化测试类

//$timer->start();//放在代码开始执行的测试点

//$timer->stop(); //放在代码执行结束的测试点

//print_r('</br>运行时间为: '.$timer->spent()) ;

//unset($timer);