程序运行时间

//程序运行时间
$starttime = explode(" ",microtime());
echo microtime();
/*········以下是代码区·········*/
for($i=0;$i<1000000;$i++){
    echo $i;
}
/*········以上是代码区·········*/
//程序运行时间
$endtime = explode(" ",microtime());
$thistime = $endtime[0]+$endtime[1]-($starttime[0]+$starttime[1]);
$thistime = round($thistime,3);
echo "本网页执行耗时：".$thistime." 秒。".time();