What are the different methods for passing variables in PHP and how should they be accessed?

In PHP, variables can be passed using methods such as GET, POST, and SESSION. GET variables are passed through the URL and can be accessed using the $_GET superglobal array. POST variables are passed through a form submission and can be accessed using the $_POST superglobal array. SESSION variables are stored on the server and can be accessed using the $_SESSION superglobal array. Example: 

// Using GET method
$variable = $_GET['variable_name'];

// Using POST method
$variable = $_POST['variable_name'];

// Using SESSION method
session_start();
$variable = $_SESSION['variable_name'];

Keywords

GET POST SESSION COOKIE GLOBALS

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