Fatal error: Uncaught Error: Call to undefined function mysql_ping() in /application/models/DbClass.php:19 Stack trace: #0 /application/models/DbClass.php(15): DbClass->mysql_connect() #1 /index.php(37): DbClass->__construct('localhost', 'sens2', 'przemyslowa1', 'sens2') #2 {main} thrown in /application/models/DbClass.php on line 19