Unbeatable Tic-Tac-Toe

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Warning: DOMDocument::load(): expected '>' in /usr/local/www/apache24/data/tictactoe/games.xml, line: 18740 in /usr/local/www/apache24/data/tictactoe/index.php on line 36

Warning: DOMDocument::load(): Opening and ending tag mismatch: moves line 18740 and mov in /usr/local/www/apache24/data/tictactoe/games.xml, line: 18740 in /usr/local/www/apache24/data/tictactoe/index.php on line 36

Warning: DOMDocument::load(): Premature end of data in tag game line 18739 in /usr/local/www/apache24/data/tictactoe/games.xml, line: 18740 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('t8823', 'moves', '_O_XOXXO_') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('_O_XOXXO_', 't8823') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38