Fatal error: Uncaught Error: Call to undefined function mysql_connect() in D:\phpstudy_pro\WWW\sundoep.cn\inc\fun\mysql.php:19 Stack trace: #0 D:\phpstudy_pro\WWW\sundoep.cn\inc\fun\mysql.php(38): db_class->connect() #1 D:\phpstudy_pro\WWW\sundoep.cn\inc\fun\mysql.php(64): db_class->query('select * from p...') #2 D:\phpstudy_pro\WWW\sundoep.cn\manage\system\down_file.php(11): db_class->get_one('product_file', 'DId='9'', '*') #3 {main} thrown in D:\phpstudy_pro\WWW\sundoep.cn\inc\fun\mysql.php on line 19