为啥可以登录，但无法连接数据库

include("sqlInfo.inc");

$connect = mysqli_connect($host, $account, $password)

	or die("Couldn't connect to server");

$db = mysqli_select_db($connect,"world")

	or die("Couldn't connect to database");

$sql = "SELECT * FROM city";

$result = mysql_query($sql)

	or die("Couldn't query to table".mysql_error());

while($row = mysql_fetch_array($result))

{

	foreach($row as $value)

	{

		echo "$value
";

	}

}

?>