php如何输出能让google浏览器直接播放的mp4文件

<?phpfunction PutMovie($file) {	header("Content-type: video/mp4");	header("Accept-Ranges: bytes");		$size = filesize($file);	if(isset($_SERVER['HTTP_RANGE'])){		header("HTTP/1.1 206 Partial Content");		list($name, $range) = explode("=", $_SERVER['HTTP_RANGE']);		list($begin, $end) =explode("-", $range);		if($end == 0) $end = $size - 1;	}	else {		$begin = 0; $end = $size - 1;	}	header("Content-Length: " . ($end - $begin + 1));	header("Content-Disposition: filename=".basename($file));	header("Content-Range: bytes ".$begin."-".$end."/".$size);	$fp = fopen($file, 'rb');	fseek($fp, $begin);	while(!feof($fp)) {		$p = min(1024, $end - $begin + 1);		$begin += $p;		echo fread($fp, $p);	}	fclose($fp);}putfile("1.mp4");?>