DevShed finishes off their series on data validation with this eighth part - a look at using static methods to create a simple validation helper class (a rework of earlier code).

The methods of the [previously created] helper were always called in the object scope, implying that there was a previous instantiation of the class. In this particular case, this process is completely unnecessary, aside from encouraging a bad programming habit. Therefore, in this last tutorial of the series I'm going to improve the source code of this validation helper class by declaring all of its implemented methods static.

In the code they redefine their methods (like validate_int and validate_alpha) to be static and directly callable without having to make an instance/object of the class.