Unbeatable Tic-Tac-Toe

Select	Select	X
Select	O	Select
Select	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('t1653', 'moves', '__X_O__XO') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('__X_O__XO', 't1653') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38