private function set_client_extension()
    {
        $ext = \pathinfo($this->client_name, PATHINFO_EXTENSION);

        if (!empty($ext)) {
            return $ext;
        }

        return null;
    }
private function set_client_extension()
    {
        $ext = \pathinfo($this->client_name, PATHINFO_EXTENSION);

        if (!empty($ext)) {
            return $ext;
        }

        return null;
    }
private function set_client_extension ( ) { $ ext = \ pathinfo ( $ this -> client_name , PATHINFO_EXTENSION ) ; if ( ! empty ( $ ext ) ) { return $ ext ; } return null ; }
Get the client ext of the uploaded file.

@since 1.0.0
Get the client ext of the uploaded file .