Defining an Abstract Class with Restrictive Constructors in PHP 5

- (devshed) - 4 months, 3 weeks ago...

In this second part of a four-part series, I rebuild the example application developed in the previous tutorial. As you'll recall, it used a protected constructor to prevent the instantiation of the base array iterator class. In this case, a better result will be achieved by declaring the iterator abstract; still, the example demonstrates a simple utilization of a restrictive constructor in a concrete situation. - Unquestionably, the introduction of a more robust object model in PHP 5 ha...