Can you explain the concept of serialization in PHP and how it can be used to address the issue of retaining object values?

When dealing with retaining object values in PHP, serialization can be used to convert objects into a string representation that can be stored or transmitted. By serializing objects, their state can be saved and later restored, allowing objects to be recreated with their original values intact.

class MyClass {
    public $name;
    public $age;
}

// Create an object
$obj = new MyClass();
$obj->name = "John";
$obj->age = 30;

// Serialize the object
$serializedObj = serialize($obj);

// Store or transmit the serialized object
// Later, unserialize the object to restore its original values
$restoredObj = unserialize($serializedObj);

// Access the restored object's values
echo $restoredObj->name; // Output: John
echo $restoredObj->age; // Output: 30