Unbeatable Tic-Tac-Toe

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

Warning: DOMDocument::load(): Extra content at the end of the document in /usr/local/www/apache24/data/tictactoe/games.xml, line: 42884 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('t2602', 'moves', 'XOX_O__XO') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('XOX_O__XO', 't2602') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38