What are some common features of a PHP-based tippspiel for the World Cup?

Common features of a PHP-based tippspiel for the World Cup include user registration, login functionality, the ability for users to make predictions on match outcomes, leaderboards to display top users, and the option to view past match results. 

// Example code for user registration functionality
if($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data and insert into database
    $username = $_POST["username"];
    $password = $_POST["password"];
    
    // Insert user data into database
    $sql = "INSERT INTO users (username, password) VALUES ('$username', '$password')";
    // Execute SQL query
}

Keywords

MySQL PHP sessions Bootstrap AJAX JSON

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