I am writing one function for getting some different database query. Now things are going well but only need to get last directory name from defined path.
$q
Try explode('/', '/learnphp/docs/')
to split the string into array locations. Then fetch the last location.
Here is more info: http://php.net/manual/en/function.explode.php
This will help you
$qa_path=site_root('/learnphp/docs/');
$q_path = explode ("/", $qa_path);
$lastV = end($q_path);