How can the use of deprecated mysql functions in PHP scripts be avoided or replaced with more modern alternatives?

The use of deprecated MySQL functions in PHP scripts can be avoided by switching to more modern alternatives like MySQLi or PDO. These alternatives provide more secure and efficient ways to interact with databases. To replace deprecated MySQL functions, simply update the code to use MySQLi or PDO functions instead.

// Deprecated MySQL function
mysql_connect("localhost", "username", "password");

// Updated MySQLi function
$mysqli = new mysqli("localhost", "username", "password");

// Updated PDO function
$pdo = new PDO("mysql:host=localhost;dbname=database", "username", "password");