Block

} elseif ($_GET['block']) {
    $result = @mysqli_query($mysqli_link, "SELECT block_id FROM blocked WHERE block_id='$account_id' AND player_id='$player_id' LIMIT 1")or die("Cannot double-check blocks! " . @mysqli_error($mysqli_link));
    $row = @mysqli_fetch_array($result);
    if ($row['block_id']) {
        myError("This player is already blocked!");
    } else {
        @mysqli_query($mysqli_link, "INSERT INTO blocked(block_id, player_id) VALUES('$account_id', '$player_id')")or die("Cannot block player! " . @mysqli_error($mysqli_link));
        myError("Player blocked!");
    }