How can you ensure that each player is selected only once when updating the database table in a PHP script?

To ensure that each player is selected only once when updating the database table in a PHP script, you can use a flag or a separate table to keep track of which players have already been selected. Before selecting a player, check if they have already been selected and skip them if they have. This can help prevent duplicate selections and ensure each player is chosen only once.

// Assuming $selectedPlayers is an array containing the IDs of players already selected
$selectedPlayers = array();

// Check if player has already been selected before updating the database
if (!in_array($playerId, $selectedPlayers)) {
    // Update database table with selected player
    // Add player to selectedPlayers array to prevent duplicate selections
    $selectedPlayers[] = $playerId;
}