Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /biblio/Database_File_Class.php:22 Stack trace: #0 /biblio/Database_File_Class.php(38): Database->database_connector(true) #1 /biblio/Session_Class.php(162): Database->getData('select id from ...') #2 /biblio/Session_Class.php(234): Session->getNativeId() #3 /biblio/Session_Class.php(26): Session->getVariables() #4 /gniezno.php(23): Session->__construct() #5 {main} thrown in /biblio/Database_File_Class.php on line 22