php计算页面程序执行了多长时间代码

php教程计算页面执行了多长时间代码

function test()        
{        
    list($a,$b)= explode(" ",microtime());        
    return (float)$a+(float)$b;        
}

$a=test();       
echo $a;       
$time    = sprintf("%.12f",(double)test()-$a);  //方法二

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

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();