Are there better methods for uniquely identifying users in PHP sessions without relying on client-side data like user agent and IP address?

Using client-side data like user agent and IP address to uniquely identify users in PHP sessions can be unreliable due to factors like shared IP addresses and user agent spoofing. A better method for uniquely identifying users in PHP sessions is to generate a unique identifier for each user upon login and store it in a secure session variable. This unique identifier can be used to track the user throughout their session without relying on potentially unreliable client-side data. 

// Generate a unique identifier for the user upon login
$unique_id = uniqid();

// Store the unique identifier in a session variable
$_SESSION['user_id'] = $unique_id;

// Use the unique identifier to identify the user throughout their session
$user_id = $_SESSION['user_id'];

Keywords

PHP sessions unique identifier server-side data session hijacking security.

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