php实现的Timer页面运行时间监测类_php技巧
本文实例讲述了php实现的Timer页面运行时间监测类及其用法,是一款非常实用的PHP类文件。分享给大家供大家参考。具体分析如下:
该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类文件如下:
<?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示例代码如下:
<?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
完整实例源码点击此处本站下载。
希望本文所述对大家的PHP程序设计有所帮助。

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