Get up to 60 % extra points for free! More info

Lesson 21 - Form framework for PHP - Improvements

In the previous lesson, Form framework for PHP - RadioGroup and FileBox, we finished our form framework. After using it for a while, I came up with several improvements which we'll implement in today's tutorial. These improvements extend the framework for other uses.

Choosing the HTTP method

Although we send forms exclusively using the $_POST method, sometimes it's useful to send it via the $_GET method. Consider the product filtering in an e-shop that is based on some criteria (minimal and maximal price, number of products per page, way of ordering, and so on). When we filter products this way, we may need to be able to send the URL address to the user and show them our results including the data which we would've submitted. This is exactly when the $_GET method comes into play (see the screenshot below).

Filtering form which is using the $_GET method

The complete URL address for the part of the e-shop shown above would look like this:

http://domain.com/products/index/living-room/flowerpots/glass-flowerpots?form-name=filter-form&phrase=&order_by=lowest_price&start_price=50&end_price=120&filter=Filter

Form.php

We'll start by modifying the form itself. We'll add constants for the HTTP methods and a private $method property, which is a method by which the form will be submitted:

const METHOD_POST = 'POST';
const METHOD_GET = 'GET';

private $method;

FormControl.php

We'll direct other modifications to the FormControl class which is the parent of all form controls. There, we'll also add a $method property and a series of methods for working with data submitted by the form:


 

...End of the preview...
Continue further

You will gain knowledge worth hundreds of thousands for a few crowns

You've come here and that's great! We believe that the first lessons showed you something new and useful
Do you want to continue the course? Go to the premium section.

Limited offer: Learn all knowledge and save money

Buy lessons and exercise submitting one by one 130 points
Buy all currently available lessons with exercise submitting and other features for an exclusive price 111 points ($9.99)
Currently, you have 0 points
By buying this exclusive package, you'll have access to all 26 lessons in this course including exercise submitting while saving $1.71. This offer is limited for the first lessons only with an additional exclusive 15% discount.
You gain 111 points for adding an article to the site, or for $11.70 $9.99

Warning, by buying just this lesson you'll lose the limited 15% discount for the package of all the lessons.

Buy only the lesson 10 points
Currently, you have 0 points
You gain 10 points for adding an article to the site, or for $0.90

Before buying this article, you have to buy the previous one

This article is licensed: Premium, by buying this article, you agree with the terms of use.

What will you get from us in the next lessons?
  • Unlimited and permanent access to individual lessons.
  • High quality IT knowledge.
  • Skills to help you get your dream and well-paid job.

Article description

Requested article covers this content:

In this tutorial, we'll improve our form framework with the GET method, determine the submit button, and add inline rendering.

You gain points by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

Article has been written for you by David Capka
Avatar
The author is a programmer, who likes web technologies and being the lead/chief article writer at ICT.social. He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn university David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.
Activities (8)