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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 ...

PHP 3 was released in mid-1998. Some basic object-oriented (OO) capabilities were included, more or less as an afterthought, to "provide new ways of accessing arrays." 1 No significant changes were ...

Object-Oriented PHP by Peter Lavin teaches the fundamentals of object-oriented programming (OOP) by guiding the reader through a series of inter-related example classes. There are two audiences that ...

Implement methods to set and get these properties, and a method displayProductDetails() to output the product details in a readable format. Create a ShoppingCart class that can hold multiple Product ...