获取凌晨几点的方法

$time=mktime(6,0,0,date('m'),date('d'),date('Y'));

第一个参数是时 第二个是分  第三个是秒

function datetime($datetime){
	$year = date("Y");
	$month = date("m");
	$day = date("d");
	$start = mktime(0,0,0,$month,$day,$year);//当天开始时间戳
	$end= mktime(23,59,59,$month,$day,$year);//当天结束时间戳
	if($datetime > $start){
		$createtime = date("H:i:s",$datetime);
	}else {
		$createtime = date("Y:m:d",$datetime);
	}
	return $createtime;
}

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转载自blog.csdn.net/joker6295/article/details/83713830