Warning: Use of undefined constant PREFIX_DB - assumed 'PREFIX_DB' (this will throw an Error in a future version of PHP) in /z_inc/db.php on line 2

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /z_inc/db.php:6 Stack trace: #0 /z_inc/db.php(16): polacz() #1 /index.php(32): pokaz_tresc(1) #2 {main} thrown in /z_inc/db.php on line 6