Reading Form Data with Superglobals
Access form fields via _GET and _POST arrays.
PHP Superglobals
Superglobals are built-in PHP arrays available in all scopes — you don't need global to access them in functions.
Form-related superglobals: $_GET, $_POST, $_FILES, $_REQUEST
Accessing $_POST Fields
Read POST form values using array key access with a default fallback:
<?php
// Safe access with null coalescing
$username = $_POST['username'] ?? '';
$email = $_POST['email'] ?? '';
$age = (int) ($_POST['age'] ?? 0);
var_dump($username, $email, $age);All lessons in this course
- GET vs POST: When to Use Each
- Reading Form Data with Superglobals
- Input Validation Techniques
- Sanitizing User Input