Display data from a Gravity Forms form

display_data_gravity_forms_form.php

<?php
/*
Plugin Name: Brisbane Respsonsive Lab Credits
Plugin URI: http://www.sennza.com.au
Description: A plugin to display the gravatars, names and devices of the people who have donated devices to the project
Version: 1.0
Author: Bronson Quick
Author URI: http://www.sennza.com.au
License: GPL2
*/
class Sennza_Responsive_Lab_Credits {
    function &credits($content){
        global $credits;
        $form_id = 4;
        $entries = RGFormsModel::get_leads($form_id);
        if ($entries):
            $credits = "<ul class='responsive-donors'>";
            foreach ($entries as $entry):
                $credits .= "<li>";
                $name = $entry['1.3'] . " " . $entry['1.6'];
                $credits .= get_avatar( $entry['2'], 300, '', $name );
                $credits .= "<p><strong>". $name ."</strong></p>";
                $credits .= '<p><a href="'. $entry['3'] . '" title="'. $entry['3'] .'" class="donated-link">'. $entry['3'] .'</a></p>';
                $device_details = unserialize($entry['4']);
                if ($device_details):
                    $credits .= "<p>Kindly Donated:</p>";
                    $credits .= "<ul class='responsive-designers'>";
                        foreach( $device_details as $device):
                            $credits .= "<li>" .$device . "</li>";
                        endforeach;
                    $credits .= "</ul>";
                endif;
                $credits .= "</li>";
            endforeach;
            $credits .= "</ul>";
        else:
            $credits = "There are no entries";
        endif;
        return $content . $credits;
    }
    function &css(){
        wp_register_style( 'responsive-lab-style', plugins_url('/css/responsive-lab-credits.css', __FILE__) );
        wp_enqueue_style( 'responsive-lab-style' );
    }
}
add_shortcode('responsivelab-credits', array('Sennza_Responsive_Lab_Credits', 'credits'));
add_action( 'wp_enqueue_scripts', array('Sennza_Responsive_Lab_Credits', 'css') );