What are the advantages and disadvantages of using LAN-IP for user identification in PHP?

When using LAN-IP for user identification in PHP, the advantage is that it can provide a relatively unique identifier for users within a local network. This can be useful for tracking user activity or restricting access to certain resources. However, the disadvantage is that LAN-IP addresses can change frequently, especially in dynamic network environments, leading to potential identification errors or security vulnerabilities. 

// Get the user's LAN-IP address
$lan_ip = $_SERVER['REMOTE_ADDR'];

// Use the LAN-IP address for user identification
$user_id = md5($lan_ip);

Keywords

LAN-IP user identification advantages disadvantages PHP

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