What alternative methods or functions can be used in place of deprecated MySQL functions in the PHP code for better compatibility and security?

Many MySQL functions in PHP have been deprecated in favor of MySQLi or PDO for better compatibility and security. To address this issue, you can replace deprecated MySQL functions with their MySQLi equivalents. This will ensure that your code remains functional and secure in the long term.

// Deprecated MySQL function
$connection = mysql_connect($host, $username, $password);

// Updated MySQLi function
$connection = mysqli_connect($host, $username, $password);