php计算页面执行了多长时间代码

<script>ec(2);</script>

代码如下	复制代码
function test()         {             list($a,$b)= explode(" ",microtime());             return (float)$a+(float)$b;         }

    
      

代码如下	复制代码
$a=test();        echo $a;        $time    = sprintf("%.12f",(double)test()-$a);

//方法二

代码如下

复制代码

function ss_timing_start ($name = 'default') {       global $ss_timing_start_times;       $ss_timing_start_times[$name] = explode(' ', microtime()); } function ss_timing_stop ($name = 'default') {       global $ss_timing_stop_times;       $ss_timing_stop_times[$name] = explode(' ', microtime()); } function ss_timing_current ($name = 'default') {       global $ss_timing_start_times, $ss_timing_stop_times;       if (!isset($ss_timing_start_times[$name])) {           return 0;       }       if (!isset($ss_timing_stop_times[$name])) {           $stop_time = explode(' ', microtime());       }       else {           $stop_time = $ss_timing_stop_times[$name];       }       // do the big numbers first so the small ones aren't lost       $current = $stop_time[1] - $ss_timing_start_times[$name][1];       $current += $stop_time[0] - $ss_timing_start_times[$name][0];       return $current; } ss_timing_start(); /** 以下是你的页面的代码 */ require_once    'index.php教程'; //index.php是要测试执行时间的页面 /* 页面代码结束 */ ss_timing_stop();

//方法三

代码如下

复制代码

class timer { var $starttime = 0; var $stoptime = 0; var $timespent = 0; function start(){ $this->starttime = microtime();} function stop(){ $this->stoptime　= microtime();} function spent(){ if ($this->timespent) { return $this->timespent; } else { $startmicro = substr($this->starttime,0,10); $startsecond = substr($this->starttime,11,10); $stopmicro　 = substr($this->stoptime,0,10); $stops教程econd　= substr($this->stoptime,11,10); $start = doubleval($startmicro) + $startsecond; $stop　= doubleval($stopmicro) + $stops教程econd; $this->timespent = $stop - $start; return substr($this->timespent,0,8)."秒"; } }// end function spent(); }//end class timer; //例子 $timer = new timer; $timer->start(); /* 你的代码放在此处 */ $timer->stop(); echo "执行本script共".$timer->spent();