這段代碼錯在哪里??

/**
?*?得到指定一條記錄
?*?@param?string?$sql
?*?@param?string?$result_type
?*?@return?multitype
?*/
function?fetchone($sql,$result_type=MYSQLI_ASSOC){
	$link=mysqli_connect(DB_HOST,DB_USER,DB_PWD,DB_DBNAME)?or?die('connect?error:'.mysqli_connect_errno().":".mysqli_connect_error());
	$result=mysqli_query($link,$sql);
	$row=mysqli_fetch_array($result,$result_type);
	return?$row;
}