Home  >  Article  >  Backend Development  >  php实现的Timer页面运行时间监测类_php技巧

php实现的Timer页面运行时间监测类_php技巧

WBOY
WBOYOriginal
2016-05-16 20:35:411024browse

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。

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn