**php Timer 页面运行时间监测类，可按不同key监测不同的运行时间** **Timer.class.php** ~~~ <?php /**Timer class, 计算页面运行时间,可按不同key计算不同的运行时间 *Date: 2014-02-28 *Author: fdipzone *Ver: 1.0 * *Func: *public start 记录开始时间 *public end 记录结束时间 *public getTime 计算运行时间 *pulbic printTime 输出运行时间 *private getKey 获取key *private getMicrotime 获取microtime */ class Timer{ // class start private $_start = array(); private $_end = array(); private $_default_key = 'Timer'; private $_prefix = 'Timer_'; /**记录开始时间 * @param String $key 标记 */ public function start($key=''){ $flag = $this->getKey($key); $this->_start[$flag] = $this->getMicrotime(); } /**记录结束时间 * @param String $key 标记 */ public function end($key=''){ $flag = $this->getKey($key); $this->_end[$flag] = $this->getMicrotime(); } /**计算运行时间 * @param String $key 标记 * @return float */ public function getTime($key=''){ $flag = $this->getKey($key); if(isset($this->_end[$flag]) && isset($this->_start[$flag])){ return (float)($this->_end[$flag] - $this->_start[$flag]); }else{ return 0; } } /**输出页面运行时间 * @param String $key 标记 * @return String */ public function printTime($key=''){ printf("%srun time %f ms\r\n", $key==''? $key : $key.' ', $this->getTime($key)*1000); } /**获取key * @param String $key 标记 * @return String */ private function getKey($key=''){ if($key==''){ return $this->_default_key; }else{ return $this->_prefix.$key; } } /**获取microtime */ private function getMicrotime(){ list($usec, $sec) = explode(' ', microtime()); return (float)$usec + (float)$sec; } } // class end ?> ~~~ **demo：** ~~~ <?php require 'Timer.class.php'; $timer = new Timer(); $timer->start(); $timer->start('program1'); usleep(mt_rand(100000,500000)); $timer->end('program1'); $timer->printTime('program1'); $timer->start('program2'); usleep(mt_rand(100000,500000)); $timer->end('program2'); $timer->printTime('program2'); $timer->end(); $timer->printTime(); ?> ~~~ **demo运行输出：** ~~~ program1 run time 163.285971 ms program2 run time 100.347042 ms run time 264.035940 ms ~~~ **源码下载地址：[点击查看](http://download.csdn.net/detail/fdipzone/6976601)**