how to require_once in codeigniter

Question

I am trying to extend a library in codeigniter. The only way to do so seems to include the original library using require_once then load the extended library us

Answer 1

If the library is a codeigniter specific library, as sbaaaang points out, you should use:

$this->load->library('ion_auth');

However, if the library is just a generic PHP class or set of functions, the codeiginter loader may not recognize it. Then you will need to use either one of the generic loading operators (include, include_once, require, require_once), with the APPPATH constant, as also pointed out:

require_once(APPPATH.'libraries/ion_auth.php');