本文實例講述了php實現用於計算執行時間的類。分享給大家供大家參考。具體如下:
有了這個php類,計算函數或者一段代碼的執行時間就簡單了
<?php
class c_Timer {
var $t_start = 0;
var $t_stop = 0;
var $t_elapsed = 0;
function start() {
$this->t_start = microtime();
}
function stop() {
$this->t_stop = microtime();
}
function elapsed() {
if ($this->t_elapsed) {
return $this->t_elapsed;
} else {
$start_u = substr($this->t_start,0,10);
$start_s = substr($this->t_start,11,10);
$stop_u = substr($this->t_stop,0,10);
$stop_s = substr($this->t_stop,11,10);
$start_total = doubleval($start_u) + $start_s;
$stop_total = doubleval($stop_u) + $stop_s;
$this->t_elapsed = $stop_total - $start_total;
return $this->t_elapsed;
}
}
};
?>
用法示例如下:
<?php $timer = new c_Timer; $timer->start(); echo "<hr>"; $timer->stop(); echo $timer->elapsed(); ?>
希望本文所述對大家的php程序設計有所幫助。