What is the recommended method for passing variables between PHP files?

When passing variables between PHP files, one recommended method is to use sessions. Sessions allow you to store variables that can be accessed across multiple pages during a user's visit to a website. By starting a session in one PHP file and setting variables within that session, you can then access those variables in other PHP files as needed. 

// File 1: setting a session variable
session_start();
$_SESSION['username'] = 'JohnDoe';

// File 2: accessing the session variable
session_start();
echo $_SESSION['username']; // Outputs 'JohnDoe'

Keywords

include require $_GET $_POST session variables

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