Only variables should be passed by reference

Check the PHP documentation about the end() function: http://php.net/manual/en/function.end.php

Quoting the parameters section:

array
The array. This array is passed by reference because it is modified by the function. This means you must pass it a real variable and not a function returning an array because only actual variables may be passed by reference.

Try this:

PHP Code:

$segments = $this->uri->segment_array(); 

$section = end($segments); 


Best regards,
José Postiga
Senior Backend Developer