What are the potential limitations of storing a large array in a PHP session?

Storing a large array in a PHP session can lead to increased memory usage and slower performance, as the entire array is serialized and stored in the session data. To avoid this issue, consider storing only essential data in the session and retrieving the rest from a database or external storage when needed. 

// Example of storing only essential data in the session
$_SESSION['user_id'] = 123;
$_SESSION['username'] = 'john_doe';

// Retrieve additional data from a database when needed
$user_data = getUserData($_SESSION['user_id']);

Keywords

array PHP session memory consumption serialization performance

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