Are there any online tutorials or resources available for updating PHP scripts from PHP 5 to PHP 7?

Updating PHP scripts from PHP 5 to PHP 7 involves making changes to deprecated features, syntax, and functions in order to ensure compatibility with the newer version. This can include updating MySQL functions to MySQLi or PDO, replacing deprecated functions with their newer equivalents, and fixing any syntax errors that may arise due to changes in PHP 7.

// Before updating to PHP 7
mysql_connect('localhost', 'username', 'password');
mysql_select_db('database_name');

// After updating to PHP 7
$mysqli = new mysqli('localhost', 'username', 'password', 'database_name');
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}