What is the purpose of using a cookie for a "Resume" function in a web app?

When implementing a "Resume" function in a web app, using a cookie can help store the user's progress or current state in a session. This allows the user to easily pick up where they left off when they return to the app. By setting a cookie with the necessary information, the app can retrieve it and display the appropriate content to resume the user's session. 

// Set a cookie with the resume data
$resume_data = array(
    'current_page' => 'resume_page',
    'user_id' => $user_id,
    // Add any other relevant data here
);

setcookie('resume_cookie', json_encode($resume_data), time() + (86400 * 30), "/"); // Cookie will expire in 30 days

Keywords

PHP cookie web app resume function session management

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