WordPress custom post types

<?php
if( ! function_exists( 'create_quote_post_type' ) ):
    function create_quote_post_type() {
        $labels = array(
            'name' => __( 'Quote' ),
            'singular_name' => __( 'Quote' ),
            'add_new' => __( 'Add quote' ),
            'all_items' => __( 'All quotes' ),
            'add_new_item' => __( 'Add quote' ),
            'edit_item' => __( 'Edit quote' ),
            'new_item' => __( 'New quote' ),
            'view_item' => __( 'View quote' ),
            'search_items' => __( 'Search quotes' ),
            'not_found' => __( 'No quotes found' ),
            'not_found_in_trash' => __( 'No quotes found in trash' ),
            'parent_item_colon' => __( 'Parent quote' )
            //'menu_name' => default to 'name'
        );
        $args = array(
            'labels' => $labels,
            'public' => true,
            'publicly_queryable' => true,
            'query_var' => true,
            'rewrite' => true,
            'capability_type' => 'post',
            'hierarchical' => false,
            'supports' => array(
                'title',
                'thumbnail',
                'editor',
                'author',
                'excerpt',
                //'trackbacks',
                //'custom-fields',
                //'comments',
                'revisions',
                //'page-attributes', // (menu order, hierarchical must be true to show Parent option)
                //'post-formats',
            ),
            'taxonomies' => array( 'category', 'post_tag' ),
            'menu_position' => 5,
            'register_meta_box_cb' => 'add_quote_post_type_metabox'
        );
        register_post_type( 'quote', $args );
        //flush_rewrite_rules();
 
		register_taxonomy( 'custom_category', // register custom taxonomy
			'quote',
			array( 'hierarchical' => true,
				'label' => 'Custom category'
			)
	    );
    }
    add_action( 'init', 'create_quote_post_type' );
endif;
 
function add_quote_post_type_metabox() { // add the meta box
    add_meta_box( 'quote_metabox', 'Meta', 'quote_metabox', 'quote', 'normal' );
}
 
function quote_metabox() {
    global $post;
    // Noncename needed to verify where the data originated
    echo '<input type="hidden" name="quote_post_noncename" id="quote_post_noncename" value="' . wp_create_nonce( plugin_basename(__FILE__) ) . '" />';
 
    // Get the data if its already been entered
    $quote_post_name = get_post_meta($post->ID, '_quote_post_name', true);
    $quote_post_desc = get_post_meta($post->ID, '_quote_post_desc', true);
 
    // Echo out the field
    ?>
 
	<div class="width_full p_box">
		<p>
			<label>Name<br>
				<input type="text" name="quote_post_name" class="widefat" value="<?php echo $quote_post_name; ?>">
			</label>
		</p>
		<p><label>Description<br>
			<textarea name="quote_post_desc" class="widefat"><?php echo $quote_post_desc; ?></textarea>
		</label>
		</p>
	</div>
 
<?php
}
 
 
function quote_post_save_meta( $post_id, $post ) { // save the data
    // verify this came from the our screen and with proper authorization,
    // because save_post can be triggered at other times
    if( !wp_verify_nonce( $_POST['quote_post_noncename'], plugin_basename(__FILE__) ) ) {
        return $post->ID;
    }
 
    // is the user allowed to edit the post or page?
    if( ! current_user_can( 'edit_post', $post->ID )){
        return $post->ID;
    }
    // ok, we're authenticated: we need to find and save the data
    // we'll put it into an array to make it easier to loop though
 
    $quote_post_meta['_quote_post_name'] = $_POST['quote_post_name'];
    $quote_post_meta['_quote_post_desc'] = $_POST['quote_post_desc'];
 
    // add values as custom fields
    foreach( $quote_post_meta as $key => $value ) { // cycle through the $quote_post_meta array
        // if( $post->post_type == 'revision' ) return; // don't store custom data twice
        $value = implode(',', (array)$value); // if $value is an array, make it a CSV (unlikely)
        if( get_post_meta( $post->ID, $key, FALSE ) ) { // if the custom field already has a value
            update_post_meta($post->ID, $key, $value);
        } else { // if the custom field doesn't have a value
            add_post_meta( $post->ID, $key, $value );
        }
        if( !$value ) { // delete if blank
            delete_post_meta( $post->ID, $key );
        }
    }
}
add_action( 'save_post', 'quote_post_save_meta', 1, 2 ); // save the custom fields
 
 
if( ! function_exists( 'view_quotes_posts' ) ): // output
 
    function view_quotes_posts( $num = 4, $do_shortcode = 1 ) {
 
        $args = array(
            'numberposts'     => $num,
            'offset'          => 0,
            //'category'        => ,
            'orderby'         => 'menu_order, post_title', // post_date, rand
            'order'           => 'DESC',
            //'include'         => ,
            //'exclude'         => ,
            //'meta_key'        => ,
            //'meta_value'      => ,
            'post_type'       => 'quote',
            //'post_mime_type'  => ,
            //'post_parent'     => ,
            'post_status'     => 'publish',
            'suppress_filters' => true
        );
 
        $posts = get_posts( $args );
 
        $html = '';
        foreach ( $posts as $post ) {
            $meta_name = get_post_meta( $post->ID, '_quote_post_name', true );
            $meta_desc = get_post_meta( $post->ID, '_quote_post_desc', true );
            $img = get_the_post_thumbnail( $post->ID, 'medium' );
            if( empty( $img ) ) {
                $img = '<img src="'.plugins_url( '/img/default.png', __FILE__ ).'">';
            }
 
 
	if( has_post_thumbnail( $post->ID ) ) {
		$image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'single-post-thumbnail' );
		$img_url = $image[0];
		//the_post_thumbnail( 'thumbnail' ); /* thumbnail, medium, large, full, thumb-100, thumb-200, thumb-400, array(100,100) */
	}
 
            //$content = $post->post_content;
            if( $do_shortcode == 1) {
                $content = do_shortcode( $post->post_content );
            }else{
                $content = strip_shortcodes( $post->post_content );
            }
 
            $html .= '
            <div>
				<h3>'.$post->post_title.'</h3>
				<div>
                    <p>Name: '.$meta_name.'</p>
                    <p>Description: '.$meta_desc.'</p>
				</div>
				<div>'.$img.'</div>
				<div>'.$content.'</div>
			</div>
    		';
        }
        $html = '<div class="wrapper">'.$html.'</div>';
        return $html;
    }
 
endif;
?>

<?php
if( function_exists( 'view_quotes_posts' ) ) {
    echo view_quotes_posts();
}
?>

<?php
			$tax_name = 'custom_category';
			$args = array(
				'hide_empty' => false,
				'hierarchical' => false,
				'parent' => 0
			);
			$taxonomies = get_terms($tax_name, $args);
			echo '<ul class="taxonomy">';
			foreach( $taxonomies as $taxonomy ){
				$link = get_term_link( $taxonomy, $tax_name );
				echo '<li>';
				echo '<a href="'.$link.'">';
				echo $taxonomy->name;
				echo '</a>';
				$sub_args = array(
					'hide_empty' => false,
					'hierarchical' => false,
					'parent' => 0
				);
				$sub_taxonomies = get_terms($tax_name, $sub_args);
				$children = get_term_children( $taxonomy->term_id, $tax_name );
				echo ' c= '.count($children);
 
				echo '</li>';
			}
			echo '</ul>';
?>