What is the potential risk of using outdated MySQL functions in PHP code?

Using outdated MySQL functions in PHP code can pose a security risk as these functions may be deprecated and no longer receive updates or patches for vulnerabilities. To mitigate this risk, it is recommended to switch to newer, more secure alternatives such as MySQLi or PDO.

// Using MySQLi to connect to a database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

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

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