What are some potential pitfalls of allowing users to vote multiple times within a short period based on IP address in PHP?

Allowing users to vote multiple times based on IP address can lead to manipulation of the voting system by users who can easily change their IP address. To prevent this, you can implement a more secure solution by using user accounts or cookies to track votes. This way, each user can only vote once, regardless of their IP address. 

// Example code snippet using user accounts to track votes
session_start();

if(isset($_SESSION['voted'])) {
    echo "You have already voted.";
} else {
    // Process the vote
    $_SESSION['voted'] = true;
    echo "Thank you for voting!";
}

Keywords

IP address session management rate limiting SQL injection security vulnerability

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