What are common reasons for losing a session in PHP, and how can it be prevented?

Common reasons for losing a session in PHP include server misconfigurations, exceeding the session timeout, or explicitly calling session_destroy(). To prevent session loss, make sure to properly configure session settings, regularly update session variables to keep the session active, and avoid manually destroying the session unless necessary. 

// Prevent session loss by updating session variables regularly
session_start();

// Update session variables every 30 minutes
if(isset($_SESSION['last_activity']) && (time() - $_SESSION['last_activity'] > 1800)) {
    session_regenerate_id(true);
    $_SESSION['last_activity'] = time();
}

Keywords

session PHP timeout cookie session_regenerate_id

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