Mastering PHP 7

Using __wakeup()

The topic of serializable objects would not be complete without the serialize() method counterpart--the  unserialize() method. If the serialize() method call triggers the object's __sleep() magic method, it is logical to expect there is a similar behavior for deserialization. Rightfully so, calling the unserialize() method upon a given object triggers its __wakeup() magic method.

The intended use of __wakeup() is to reestablish any resources that might have been lost during serialization and perform other reinitialization tasks.

Let's take a look at the following example:

<?phpclass Backup{  protected $ftpClient;  protected $ftpHost;  protected $ftpUser;  protected $ftpPass; public function __construct($host, $username, $password) ...