Gain insights into modern PHP by delving into POST requests, forms, sessions, and redirects to build a CRUD app with authentication, focusing on pure PHP without frameworks.

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PHP for the Web is a terrific introduction on how to use modern PHP effectively. While there is a lot of material out there about building applications with PHP, most of them focus on using a framework like Laravel or Symfony. By working with pure PHP, you will be able to focus on the core ideas instead of how a particular framework implements them.

In this course, you will learn how to use multiple web technologies like POST requests, forms, sessions, and redirects to build a CRUD application with an authentication system.

By the end, you will have all the ingredients at your disposal to go out and build stunning, dynamic PHP web applications.

PHP for the Web: Learn PHP without a Framework

## Why use HTML forms?

We have seen how you can let the PHP server serve PHP scripts.
We also saw how you can provide input to these scripts using query parameters, which are part of the URL.
This works great if the input is something the application produces, like the random number in `/random.php`.
But if we want the user to provide the input themselves, we should use an *HTML form*.
A form is much more user-friendly since the user doesn't have to modify the URL manually.
They can just type something in a form field, select an item from a combobox, put a checkmark somewhere, and submit the data to the server.

## Adding a form
We're going to add a simple form to the `/kittens.php` page.
The form has a field for providing a number.
Once you submit the form, the form data will be sent as query parameters.

First, add the form to `kittens.php` just before the closing `</body>` tag:


# Why use HTML forms?

We have seen how you can let the PHP server serve PHP scripts.
We also saw how you can provide input to these scripts using query parameters, which are part of the URL.
This works great if the input is something the application produces, like the random number in `/random.php`.
But if we want the user to provide the input themselves, we should use an *HTML form*.
A form is much more user-friendly since the user doesn't have to modify the URL manually.
They can just type something in a form field, select an item from a combobox, put a checkmark somewhere, and submit the data to the server.

# Adding a form
We're going to add a simple form to the `/kittens.php` page.
The form has a field for providing a number.
Once you submit the form, the form data will be sent as query parameters.

First, add the form to `kittens.php` just before the closing `</body>` tag:


Let's see how HTML forms can be used to get a user's input.

Getting Started

Serving Resources

Serving PHP Scripts

Forms

Cookies

Sessions

Authentication

PHP Project Structure

CRUD Part 1: Create

CRUD Part 2: The Rest

File Uploads

Error Handling

Automated Testing

Conclusion

Submitting Form Data as Query Parameters

Why use HTML forms?

Adding a form