Shortcode to List Posts With Multiple Parameters

post-listing-shortcode.php

<?php
/*
  Plugin Name: WPTutsPlus Post-listing shortcode
  Plugin URI: http://rachelmccollin.co.uk
  Description: This plugin provides a shortcode to list posts, with parameters. It also registers a couple of post types and tacxonomies to work with.
  Version: 1.0
  Author: Rachel McCollin
  Author URI: http://rachelmccollin.co.uk
  License: GPLv2
 */
  
// register custom post type to work with
add_action('init', 'rmcc_create_post_type');

function rmcc_create_post_type() {  // clothes custom post type
    // set up labels
    $labels = array(
        'name' => 'Clothes',
        'singular_name' => 'Clothing Item',
        'add_new' => 'Add New',
        'add_new_item' => 'Add New Clothing Item',
        'edit_item' => 'Edit Clothing Item',
        'new_item' => 'New Clothing Item',
        'all_items' => 'All Clothes',
        'view_item' => 'View Clothing Item',
        'search_items' => 'Search Clothes',
        'not_found' => 'No Clothes Found',
        'not_found_in_trash' => 'No Clothes found in Trash',
        'parent_item_colon' => '',
        'menu_name' => 'Clothes',
    );
    register_post_type(
        'clothes', array(
        'labels' => $labels,
        'has_archive' => true,
        'public' => true,
        'hierarchical' => true,
        'supports' => array('title', 'editor', 'excerpt', 'custom-fields', 'thumbnail', 'page-attributes'),
        'taxonomies' => array('post_tag', 'category'),
        'exclude_from_search' => true,
        'capability_type' => 'post',
            )
    );
}

// register two taxonomies to go with the post type
add_action('init', 'rmcc_create_taxonomies', 0);

function rmcc_create_taxonomies() {
    // color taxonomy
    $labels = array(
        'name' => _x('Colors', 'taxonomy general name'),
        'singular_name' => _x('Color', 'taxonomy singular name'),
        'search_items' => __('Search Colors'),
        'all_items' => __('All Colors'),
        'parent_item' => __('Parent Color'),
        'parent_item_colon' => __('Parent Color:'),
        'edit_item' => __('Edit Color'),
        'update_item' => __('Update Color'),
        'add_new_item' => __('Add New Color'),
        'new_item_name' => __('New Color'),
        'menu_name' => __('Colors'),
    );
    register_taxonomy(
            'color', 'clothes', array(
        'hierarchical' => true,
        'labels' => $labels,
        'query_var' => true,
        'rewrite' => true,
        'show_admin_column' => true
            )
    );
    // fabric taxonomy
    $labels = array(
        'name' => _x('Fabrics', 'taxonomy general name'),
        'singular_name' => _x('Fabric', 'taxonomy singular name'),
        'search_items' => __('Search Fabrics'),
        'all_items' => __('All Fabric'),
        'parent_item' => __('Parent Fabric'),
        'parent_item_colon' => __('Parent Fabric:'),
        'edit_item' => __('Edit Fabric'),
        'update_item' => __('Update Fabric'),
        'add_new_item' => __('Add New Fabric'),
        'new_item_name' => __('New Fabric'),
        'menu_name' => __('Fabrics'),
    );
    register_taxonomy(
            'fabric', 'clothes', array(
        'hierarchical' => true,
        'labels' => $labels,
        'query_var' => true,
        'rewrite' => true,
        'show_admin_column' => true
            )
    );
}

// create shortcode with parameters so that the user can define what's queried - default is to list all blog posts
add_shortcode('list-posts', 'rmcc_post_listing_parameters_shortcode');

function rmcc_post_listing_parameters_shortcode($atts) {
    ob_start();

    // define attributes and their defaults
    extract(shortcode_atts(array(
        'type' => 'post',
        'order' => 'date',
        'orderby' => 'title',
        'posts' => -1,
        'color' => '',
        'fabric' => '',
        'category' => '',
                    ), $atts));

    // define query parameters based on attributes
    $options = array(
        'post_type' => $type,
        'order' => $order,
        'orderby' => $orderby,
        'posts_per_page' => $posts,
        'color' => $color,
        'fabric' => $fabric,
        'category_name' => $category,
    );
    $query = new WP_Query($options);
    // run the loop based on the query
    if ($query->have_posts()) {
        ?>

        <ul class="clothes-listing ">
            <?php while ($query->have_posts()) : $query->the_post(); ?>

                <li id="post-<?php the_ID(); ?>">
                    <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>"><?php the_title(); ?></a>
                </li>
            <?php endwhile;
            wp_reset_postdata();
            ?>
        </ul>

        <?php
        $myvariable = ob_get_clean();
        return $myvariable;
    }
}