Unbeatable Tic-Tac-Toe

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

Warning: DOMDocument::load(): Couldn't find end of Start Tag game line 14267 in /usr/local/www/apache24/data/tictactoe/games.xml, line: 14267 in /usr/local/www/apache24/data/tictactoe/index.php on line 36

Warning: DOMDocument::load(): Premature end of data in tag tictactoe line 2 in /usr/local/www/apache24/data/tictactoe/games.xml, line: 14267 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('t3864', 'moves', '__O_XOXOX') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('__O_XOXOX', 't3864') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38