How can variables be passed invisibly (not through the URL) to the next page in PHP?

To pass variables invisibly to the next page in PHP without using the URL, you can use sessions or cookies. Sessions store data on the server side, while cookies store data on the client side. This allows you to pass variables between pages without exposing them in the URL. 

<?php
// Start the session
session_start();

// Set a session variable
$_SESSION['variable_name'] = 'value';

// Redirect to the next page
header('Location: next_page.php');
exit;
?>

Keywords

session variables $_SESSION superglobal cookies hidden form fields POST method

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