What are the potential drawbacks of using IP addresses as a method for reload lock in PHP counters?

Using IP addresses as a method for reload lock in PHP counters can be unreliable as multiple users can share the same IP address (e.g., in a corporate network or public Wi-Fi). This can lead to inaccurate counting and potential abuse of the system. To solve this issue, you can implement a combination of IP address and session ID to uniquely identify each user. 

// Using a combination of IP address and session ID for reload lock in PHP counters
$unique_identifier = $_SERVER['REMOTE_ADDR'] . session_id();

// Use $unique_identifier for reload lock logic

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IP addresses reload lock PHP counters drawbacks potential

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