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).
The complete URL address for the part of the e-shop shown above would look like this:
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;
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...
ict.social is a large database made up of manuals and tutorials, whose main goal is to provide high-quality IT education to everyone. We started out in the Czech republic, where we display roughly a million articles per month and receive plenty of gratitude from our users. Thanks to our successful establishment, we are now bringing these articles to the rest of the world.
Although we are trying to keep our content free of charge, maintaining the site is a huge effort for everyone involved. Therefore, some content (exercises and more advanced material) costs network points. Don't worry, they're really cheap :)
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.
Buying this article gives you unlimited access to it forever. You will learn some more and help us keep giving our site maintenance which helps you and others get better futures. It's a win-win.
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.
You can get points immediately using:
|Credit card||SMS||Wire transfer|