What are the potential limitations of using cookies for storing large data in PHP sessions?

One potential limitation of using cookies for storing large data in PHP sessions is that cookies have a size limit of around 4KB. This can lead to data being truncated or not fully stored if it exceeds this limit. To overcome this limitation, it is recommended to store large data in a server-side session storage like files or databases, and only store a reference or identifier in the cookie. 

<?php
// Store large data in a server-side session storage
$_SESSION['large_data'] = $largeData;

// Store a reference or identifier in the cookie
setcookie('large_data_id', $largeDataId, time() + 3600, '/');
?>

Keywords

cookies large data PHP sessions limitations storage

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