What additional information or clarification is needed from the user to troubleshoot the problem with the PHP script effectively?

Issue: The PHP script is not connecting to the database successfully, resulting in errors when trying to retrieve or manipulate data. To troubleshoot this issue effectively, we need to know the database credentials being used in the script, such as the hostname, username, password, and database name. Additionally, it would be helpful to know if the database server is running and accessible from the server where the PHP script is hosted. PHP Code Snippet:

<?php
$hostname = "localhost"; // Database hostname
$username = "root"; // Database username
$password = "password"; // Database password
$database = "my_database"; // Database name

// Create connection
$conn = new mysqli($hostname, $username, $password, $database);

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