What are the implications of using the mysql_* functions in PHP, especially in terms of deprecation and security risks?

The mysql_* functions in PHP are deprecated and have been removed in newer versions of PHP due to security risks and lack of support for modern database features. It is recommended to switch to mysqli or PDO for database operations to ensure better security and compatibility with future PHP versions. 

// Using mysqli for database operations instead of mysql_*
$mysqli = new mysqli('localhost', 'username', 'password', 'database_name');

// Check connection
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}

// Perform a query
$query = "SELECT * FROM table_name";
$result = $mysqli->query($query);

// Fetch data from the result
while ($row = $result->fetch_assoc()) {
    // Do something with the data
}

// Close connection
$mysqli->close();

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