Object_Freezer This class provides the low-level functionality required to store ("freeze") PHP objects to and retrieve ("thaw") PHP objects from an object store. Object_Freezer::freeze() Freezes an object. In the example below, we freeze an object of class A. As this object aggregates an object of class B, the object freezer has to freeze two objects in total. <?php require_once 'Object/Freezer.p