What are some common use cases for running multiple sessions in PHP and how can it be effectively implemented?

Running multiple sessions in PHP can be useful in scenarios where you need to manage different sets of data for different users or processes simultaneously. This can be achieved by using session_name() to set a unique name for each session, allowing multiple sessions to run concurrently.

// Start the first session
session_name('session1');
session_start();
$_SESSION['data1'] = 'Some data for session 1';

// Start the second session
session_name('session2');
session_start();
$_SESSION['data2'] = 'Some data for session 2';