Warning: mysqli_connect(): (HY000/1045): Access denied for user 'sek_sek'@'localhost' (using password: YES) in /home/sek/public_html/sek/zad1/szkolenia.php on line 21

Fatal error: Call to a member function query() on boolean in /home/sek/public_html/sek/zad1/szkolenia.php on line 22