What are the potential challenges of accessing a MySQL database from a PHP server on a different host?

One potential challenge of accessing a MySQL database from a PHP server on a different host is ensuring that the database server allows remote connections and that the proper firewall rules are set up to allow communication between the two hosts. Additionally, you may need to update the MySQL user permissions to allow connections from the PHP server's IP address. Finally, you will need to update the connection string in your PHP code to include the remote host's IP address or domain name. 

<?php
$servername = "remote_host_ip";
$username = "username";
$password = "password";
$dbname = "database_name";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}
echo "Connected successfully";
?>

Keywords

MySQL PHP database connection remote server firewall restrictions

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