Gravity Forms Counter

// http://pastebin.com/kHpaHQvi originally
// http://www.gravityhelp.com/forums/topic/show-total-donations
// usage: [guests form=01] where 1 is the form ID
add_shortcode('guests', 'total_guests');
function total_guests($atts) {
        $form_id = $atts['1'];
        // function to pull all the entries for one form
        $guests = RGFormsModel::get_leads($form_id);
        // start the total at zero
        $total = 0;
        // initialize a counter for the number of guests entries made
        $i = 0;
        // loop through all the returned results
        foreach ($guests as $amount) {
                // add each guests amount to the total
                // change 2 here to the field ID which holds the guests amount
                // the preg_replace will strip anything that is not a number or decimal
                $numeric_amount =  preg_replace('/[^0-9\.]/Uis', '', $amount[2]);
                $total += $amount[2];
                // increment the counter so we know how many guest entries there are as well
                $i++;
        }
        // change this to your locale, or, if your locale is already defined, you can remove this line
        setlocale(LC_MONETARY, 'de_DE');
        // do some formatting and return the html output from the shortcode
	$output = "Nach bisherigem Stand haben " . ($total) . " Personen ihr Kommen zugesagt.";
        // just the string above will be returned.  You can style it here or where you are using the shortcode
        return $output;
}
// needed for the above to process the guests list shortcode in sidebar widget
add_filter('widget_text', 'do_shortcode');