Best sexsite to hook up fast - Validating user input in php

Introduction Going back quickly to the topics covered in the first tutorial of the series, certainly you’ll remember that I explained the foundations of the strategy design pattern, and complemented the theory with some practical examples of how to apply this handy pattern in PHP 5.

Based upon this scenario, I developed a set of simple PHP classes.

validating user input in php-50

Jump straight into the following section and keep reading.

To demonstrate how all the classes that you learned in previous sections of this tutorial can be used to check the validity of different types of data, below I coded a short script that shows some illustrative cases where the validation strategy selector verifies firstly alphabetic and alphanumeric values, and lastly numbers and email addresses.

Of course, it’s possible to extend the initial validation capacity of the whole data checking system even more, simply by adding new strategy classes to the existing ones.

This is definitely a process that can be performed with minor hassles. At this point, you’ve seen not only how the validation strategy selector looks, but how the four strategy classes have been properly defined.

Although the example that I just described may seem rather basic, it shows in a nutshell the logic that drives the strategy pattern: on one hand there’s a class that sets the context as to where a predefined group of strategies will be applied, while on the other hand there’s one or more classes that implement these strategies.

However, now that you hopefully digested the contents of the first article of the series, let me tell you what you’ll learn in this final tutorial.This is very convenient for understanding the schema imposed by the strategy pattern.So, the question that comes up is: what’s the next step now?Therefore, it’s obviously necessary to show the respective signatures for these strategy classes, so you can see more clearly how they’re capable of performing different validation on user-supplied data.As you may have guessed, defining all these new classes is something that will be covered in the following section.Well, considering that you already grasped the logic implemented by all the classes that I defined so far, it’s time to move forward and see a concrete example where a data validation system is created by using the aforementioned classes.

Tags: , ,