Mysql_connect与Mysqli_connect

简述Mysql_connect与Mysqli_connect的区别，用一个相同的查询内容来表述，看下面的例子：

mysql_connect：

$connection_setup = mysql_connect($serveraddress . ':' . $serverport,$serveruser,$serverpass)or die(mysql_error());
mysql_select_db($server_adb,$connection_setup)or die(mysql_error());
mysql_query("set names utf8");
$server_forwow = mysql_fetch_assoc(mysql_query("SELECT * FROM realmlist WHERE id = '".$serverid."'"));

mysqli_connect：

$connection_setup = mysqli_connect($serveraddress.':'.$serverport,$serveruser,$serverpass)or die(mysqli_connect_errno());
mysqli_select_db($connection_setup,$server_adb)or die(mysqli_connect_errno());
mysqli_query($connection_setup, "set names utf8");
$server_forwow=mysqli_fetch_assoc(mysqli_query($connection_setup,"SELECT * FROM realmlist WHERE id = '".$serverid."'"));

自PHP5.5开始，使用mysql_connect将在log里予以警告，要求尽快更新到mysqli_connect，在未来将被移除。