PHP/Mysql分页：数据库连接问题

我正在尝试设置分页，但有一个恼人的数据库连接错误。你能帮我一下吗？谢谢

<?php
        include('includes/db_AF.php'); //includes the db credentials
        $connection = @new mysqli(HOSTNAME, MYSQLUSER, MYSQLPASS, MYSQLDB);
        if ($connection->connect_error) {
        die('Connect Error: ' . $connection->connect_error);
        }
        else {

if (!(isset($pagenum))) 
{ 
$pagenum = 1; 
} 


 $data = "SELECT * FROM wordtable2"; 
$data1 = mysql_query($data);
 $rows = mysql_num_rows($data1);

如果您使用库进行连接，请将其用于查询：

$result = mysqli_query($connection_obj, $query); 
$count = mysqli_num_rows($result)