一个测试页面执行时间的类

<?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);

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

$stop

= doubleval($StopMicro) + $StopSecond;

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

return substr($this->TimeSpent,0,8)."秒";

}

}

// end function spent();} //end class timer;//例子：

$timer = new timer;

$timer->start();/*你的代码放在此处*/

$timer->stop();

echo "执行本SCRIPT共".$timer->spent();?>