本文實(shí)例講述了php實(shí)現(xiàn)的Timer頁面運(yùn)行時(shí)間監(jiān)測類及其用法,是一款非常實(shí)用的PHP類文件。分享給大家供大家參考。具體分析如下:
該php Timer頁面運(yùn)行時(shí)間監(jiān)測類,可按不同key監(jiān)測不同的運(yùn)行時(shí)間。
Timer.class.php類文件如下:
?12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879 <?php /** Timer class, 計(jì)算頁面運(yùn)行時(shí)間,可按不同key計(jì)算不同的運(yùn)行時(shí)間 * Date: 2014-02-28 * Author: fdipzone * Ver: 1.0 * * Func: * public start 記錄開始時(shí)間 * public end 記錄結(jié)束時(shí)間 * public getTime 計(jì)算運(yùn)行時(shí)間 * pulbic printTime 輸出運(yùn)行時(shí)間 * private getKey 獲取key * private getMicrotime 獲取microtime */ class Timer{ // class start private $_start = array(); private $_end = array(); private $_default_key = 'Timer'; private $_prefix = 'Timer_'; /** 記錄開始時(shí)間 * @param String $key 標(biāo)記 */ public function start($key=''){ $flag = $this->getKey($key); $this->_start[$flag] = $this->getMicrotime(); } /** 記錄結(jié)束時(shí)間 * @param String $key 標(biāo)記 */ public function end($key=''){ $flag = $this->getKey($key); $this->_end[$flag] = $this->getMicrotime(); } /** 計(jì)算運(yùn)行時(shí)間 * @param String $key 標(biāo)記 * @return float */ public function getTime($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; } } /** 輸出頁面運(yùn)行時(shí)間 * @param String $key 標(biāo)記 * @return String */ public function printTime($key=''){ printf("%srun time %f ms\r\n", $key==''? $key : $key.' ', $this->getTime($key)*1000); } /** 獲取key * @param String $key 標(biāo)記 * @return String */ private function getKey($key=''){ if($key==''){ return $this->_default_key; }else{ return $this->_prefix.$key; } } /** 獲取microtime */ private function getMicrotime(){ list($usec, $sec) = explode(' ', microtime()); return (float)$usec + (float)$sec; } } // class end ?>
demo示例代碼如下:
?123456789101112131415161718192021 <?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運(yùn)行輸出:
?123 program1 run time 163.285971 ms program2 run time 100.347042 ms run time 264.035940 ms
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