I’ve done some reading about hyphens vs underscores in urls and personally I prefer hyphens. I find it seems to keep the words separate where as a underscores seem to join them together in my eyes.

PHP functions don’t allow hyphens in their name so I have to use underscores.

To solve this in CodeIgniter, so the correct function name is found from the uri segment, only one simple change needs to be made.

In system/libraries/Router.php find line 153 and change this line

$segments = $this->_validate_request($segments);

to

$segments = $this->_validate_request(str_replace(“-“, “_”, $segments));

All we need to do is do a string replacement so hyphens become underscores.