php Timer 页面运行时间监测类
最后更新于：2022-04-01 14:12:47
**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)**