Fatal error: Uncaught Error: Call to a member function fetchAll() on boolean in /www/wwwroot/kehu/gzx168.cn/class/help.class.php:14
Stack trace:
#0 /www/wwwroot/kehu/gzx168.cn/pcm/product_duibi.php(22): getAll(Object(PDO), 'select a.*,b.ty...')
#1 {main}
thrown in /www/wwwroot/kehu/gzx168.cn/class/help.class.php on line 14