functions.php file

<?php
    // Add JavaScript files
    function add_scripts() {
        wp_enqueue_script('modernizr_script', get_template_directory_uri() . '/js/modernizr.js', __FILE__);
        wp_enqueue_script('global_functions_script', get_template_directory_uri() . '/js/global-functions.js', __FILE__);
    }
    add_action('wp_enqueue_scripts', 'add_scripts');

    // Setup and load the theme options page and related code
    require(get_template_directory() . '/inc/theme-options.php');

    //Get theme options
    $options = get_option('shv_theme_options');

    // Add support for custom backgrounds
    add_custom_background();

    // Add support for post thumbnails and admin bar
    add_theme_support('post-thumbnails');
    add_theme_support('admin-bar');

    // This theme uses wp_nav_menu() in two locations
        if (function_exists('register_nav_menus')) {
            register_nav_menus(array(
                'primary' => 'Primary Navigation',
                'secondary' => 'Secondary Navigation'
            ));
        }

    /*
     * Register custom post types
     */

    //Testimonials Post Type
    class SHV_Testimonials_Post_Type {

        //Create construct function
        public function __construct() {
            $this->register_post_type();
            $this->metaboxes();
        }

        //Register post type
        public function register_post_type() {
            $args = array(
                'labels' => array(
                    'name' => 'Testimonials',
                    'singular_' => 'Testimonial',
                    'add_new' => 'Add New Testimonial',
                    'all_items' => 'All Testimonials',
                    'add_new_item' => 'Add New Testimonial',
                    'edit_item' => 'Edit Testimonial',
                    'new_item' => 'New Testimonial',
                    'view_item' => 'View Testimonial',
                    'search_items' => 'Search Testimonials',
                    'not_found' => 'No Testimonials Found',
                    'not_found_in_trash' => 'No Testimonials Found in Trash'
                ),
                'query_var' => 'testimonials',
                'rewrite' => array(
                    'slug' => 'testimonials',
                ),
                'public' => true,
                'supports' => array(
                    'title'
                )
            );
            register_post_type('shv_testimonials', $args);
        }

        //Build metaboxes
        public function metaboxes() {

            //Add new meta boxes testimonial and testimonial author
            add_action('add_meta_boxes', 'add_testimonial_meta_box');
            add_action('add_meta_boxes', 'add_testimonial_author_meta_box');

            //Run add_meta_box functions
            function add_testimonial_meta_box() {
                add_meta_box('shv_testimonial', 'Testimonial', 'testimonial', 'shv_testimonials');
            }
            function add_testimonial_author_meta_box() {
                add_meta_box('shv_testimonial_author', 'Testimonial Author', 'testimonial_author', 'shv_testimonials');
            }

            //Create form elements and pull through any data associated with each meta box
            function testimonial($post) {
                $testimonial = get_post_meta($post->ID, 'shv_testimonial', true); ?>
                <p>
                    <label for="shv_testimonial">Please enter your testimonial</label>
                    <textarea class="large-text" name="shv_testimonial" id="shv_testimonial" cols="50" rows="5"><?php echo esc_attr($testimonial); ?></textarea>
                </p>
            <?php }

            function testimonial_author($post) {
                $author = get_post_meta($post->ID, 'shv_testimonial_author', true); ?>
                <p>
                    <label for="shv_testimonial_author">Please enter a testimonial author name and school, e.g. John Doe, St Ambrose Barlow</label>
                    <input type="text" class="widefat" name="shv_testimonial_author" id="shv_testimonial_author" value="<?php echo esc_attr($author); ?>" />
                </p>
            <?php }

            //Save meta box input
            add_action('save_post', 'save_meta_data');

            function save_meta_data($id) {

                if (isset($_POST['shv_testimonial'])) {
                    update_post_meta(
                        $id,
                        'shv_testimonial',
                        strip_tags($_POST['shv_testimonial'])
                    );
                }

                if (isset($_POST['shv_testimonial_author'])) {
                    update_post_meta(
                        $id,
                        'shv_testimonial_author',
                        strip_tags($_POST['shv_testimonial_author'])
                    );
                }
            }
        }
    }

    add_action('init', 'register_testimonials');

    function register_testimonials() {
        new SHV_Testimonials_Post_Type();
    }

    function show_tweets() { ?>
        <img src="<?php echo get_bloginfo('template_directory') . '/images/twitter-bird-icon.png'; ?>" alt="Tweets" />
            <?php
                //Get theme options
                $options = get_option('shv_theme_options');
                include_once(ABSPATH . WPINC . '/feed.php');
                $username = $options['shv_twitter_username'];
                $rss = fetch_feed('https://api.twitter.com/1/statuses/user_timeline.rss?screen_name=' . $username);

                if (!is_wp_error( $rss ) ) : // Checks that the object is created correctly
                    // Figure out how many total items there are, but limit it to 5.
                    $maxitems = $rss->get_item_quantity(1);

                    // Build an array of all the items, starting with element 0 (first element).
                    $rss_items = $rss->get_items(0, $maxitems);
                endif;
            ?>
            <ul>
                <?php if ($maxitems == 0) echo '<li>No items.</li>';
                else
                // Loop through each feed item and display each item as a hyperlink.
                foreach ( $rss_items as $item ) : ?>
                    <li>
                        <a href='<?php echo $item->get_permalink(); ?>'>
                            <?php echo $item->get_title(); ?>
                        </a>
                    </li>
                <?php endforeach; ?>
            </ul>
    <?php }

    function show_testimonials() {
        $loop = new WP_Query(
            array(
            'post_type' => 'shv_testimonials',
            'order_by' => 'ID',
            )
        );

        if ($loop->have_posts()) {
            $output = '<ul class="testimonial-list">';

            while($loop->have_posts()) {
                $loop->the_post();
                $meta = get_post_meta(get_the_id(), '');
                print_r($meta);

                $output .= '
                    <li>
                        <a href="' . get_permalink() . '">
                            ' . get_the_title() . ' | ' .
                            $meta['shv_testimonial_author'][0] . '
                        </a>
                    </li>
                ';
            }
        }

        return $output;
    }
?>