And when I wanted to see my result I am getting this error
Fatal error: Uncaught Error: Call to undefined function getShoutBoxContent() in D:\Xampp\htdocs\phpbb3\includes\functions.php:4393
Stack trace:
#0 D:\Xampp\htdocs\phpbb3\index.php(240): page_header('Wykaz for\xC3\xB3w', true)
#1 {main}
thrown in D:\Xampp\htdocs\phpbb3\includes\functions.php on line 4393