php 上的访问被拒绝错误

我有3个php文件来连接phpmyadmin数据库。

Android/db_connect.php的内容：

<?php
/**
 * A class file to connect to database
 */
class DB_CONNECT {
    // constructor
    function __construct() {
        // connecting to database
        $this->connect();
    }
    // destructor
    function __destruct() {
        // closing db connection
        $this->close();
    }
    /**
     * Function to connect with database
     */
    function connect() {
        // import database connection variables
        require_once __DIR__ . '/db_config.php';
        // Connecting to mysql database
        $con = mysql_connect(DB_SERVER, DB_USER, DB_PASSWORD) or die(mysql_error());
        // Selecing database
        $db = mysql_select_db(DB_DATABASE) or die(mysql_error()) or die(mysql_error());
        // returing connection cursor
        return $con;
    }
    /**
     * Function to close db connection
     */
    function close() {
        // closing db connection
        mysql_close();
    }
}
?>

Android/db_config.php的内容：

  <?php
/*
 * All database connection variables
 */
define('DB_USER', "u155019120_movie"); // db user
define('DB_PASSWORD', "xxxxxxxxx"); // db password (mention your db password here)
define('DB_DATABASE', "u155019120_movie"); // database name
define('DB_SERVER', "mysql.hostinger.web.tr"); // db server
?>

publichtml/get_all_products的内容：

<?php
/*
 * Following code will list all the products
 */
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/../Android/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// get all products from products table
$result = mysql_query("SELECT *FROM products") or die(mysql_error());
// check for empty result
if (mysql_num_rows($result) > 0) {
    // looping through all results
    // products node
    $response["products"] = array();
    while ($row = mysql_fetch_array($result)) {
        // temp user array
        $product = array();
        $product["pid"] = $row["pid"];
        $product["name"] = $row["name"];
        $product["price"] = $row["price"];
        $product["created_at"] = $row["created_at"];
        $product["updated_at"] = $row["updated_at"];
        // push single product into final response array
        array_push($response["products"], $product);
    }
    // success
    $response["success"] = 1;
    // echoing JSON response
    echo json_encode($response);
} else {
    // no products found
    $response["success"] = 0;
    $response["message"] = "No products found";
    // echo no users JSON
    echo json_encode($response);
}
?>

当我打开 http://moviestolike.pe.hu/get_all_products.php 页面（您也可以查看）时，它说

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/u155019120/Android/db_connect.php on line 28
{"products":[{"pid":"1","name":"sogan","price":"19.30","created_at":"2016-03-12 15:08:38","updated_at":"0000-00-00 00:00:00"},{"pid":"2","name":"faltak","price":"22.00","created_at":"2016-03-12 15:08:38","updated_at":"0000-00-00 00:00:00"}],"success":1}

它提供了正确的产品。但是当我将弃用的方法更改为

  // Connecting to mysql database
    $con = mysqli_connect(DB_SERVER, DB_USER, DB_PASSWORD) or die(mysql_error());

在我在这里写的第一个文件中，输出是

    Deprecated: mysql_select_db(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/u155019120/Android/db_connect.php on line 31
Access denied for user ''@'10.2.1.37' to database 'u155019120_movie'

怎么了？我什至不知道 10.2.1.37 是什么。我的用户名是我在这里写的。

我也无法mysql_select更改为mysqli_select，它想要一个参数。