How is the usage of post in PHP?

In PHP, $_POST is a superglobal variable used to retrieve form data from an HTTP POST request. It is an associative array where the keys are the names of the form fields and the values are the corresponding field values.

In order to use the $_POST variable, you need to submit data in an HTML form using the POST method. For example:

In the example above, when the user clicks the submit button, the form data will be sent to the process.php file. In the process.php file, you can use $_POST to retrieve the values of the form fields.

$username and $password are being set to the values of the “username” and “password” inputs from a form submission.

Data can be validated, processed, and stored as needed. It is important to validate and filter data when using the $_POST variable to ensure data security.