Unbeatable Tic-Tac-Toe

New Game
Draw
X O X
X O X
O X O

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('t1526', 'moves', 'XOXXOXOXO') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('XOXXOXOXO', 't1526') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38