Unbeatable Tic-Tac-Toe

New Game
Make Your Move
Select X Select
Select O Select
X O Select

Warning: DOMDocument::load(): Document is empty in /usr/local/www/apache24/data/tictactoe/games.xml, line: 1 in /usr/local/www/apache24/data/tictactoe/index.php on line 36

Fatal error: Uncaught Error: Call to a member function getElementsByTagName() on null in /usr/local/www/apache24/data/tictactoe/index.php:38 Stack trace: #0 /usr/local/www/apache24/data/tictactoe/index.php(113): update_element('t8857', 'moves', '_X__O_XO_') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('_X__O_XO_', 't8857') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38