What is the significance of using $_POST[] in PHP and how does it relate to form submission?

Using $_POST[] in PHP is significant because it allows you to retrieve data sent to the server using the HTTP POST method. This is commonly used in form submissions where sensitive information like passwords or user inputs are sent securely to the server. By accessing form data through $_POST[], you can process and validate the input before storing it in a database or performing other actions. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST['username'];
    $password = $_POST['password'];

    // Process and validate the input data
}
?>

Keywords

$_POST PHP form submission data handling superglobal

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