WordPress Short code to generate list of donors using Give plugin

function recent_donors_function() {


    //Get the latest 100 Give Donors
    $args = array(
        'number' => 100,
        function recent_donors_function() {
            $donors = Give() - > customers - > get_customers($args);
            foreach($donors as $donor) {

                $output. = $names.$donor - > name.
                ", ";
                // First and Last Name
                $name = $names.$donor - > name;

                //Split up the names
                $separate = explode(" ", $name);

                //find the surname
                $last = array_pop($separate);

                //Shorten up the name so it's Jason T.  instead of Jason Tucker
                $shortenedname = implode(' ', $separate).
                " ".$last[0].
                ".";

                //Display the Jason T. and include a , after it.	
                $output. = $shortenedname.
                ", ";

            }
            $output. = " and many more.";
            return $output;
        }

    }
    add_shortcode('donor_list', 'recent_donors_function');
}