WordPress custom post types

Register WordPress custom post type with custom category, custom tag, default post category and tags:

<?php

if( ! function_exists( 'quote_create_post_type' ) ) :

	function quote_create_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,

			'has_archive' => true,

			'publicly_queryable' => true,

			'query_var' => true,

			'rewrite' => true,

			'capability_type' => 'post',

			'hierarchical' => false,

			'supports' => array(

				'title',

				'editor',

				'excerpt',

				'thumbnail',

				//'author',

				//'trackbacks',

				//'custom-fields',

				//'comments',

				'revisions',

				//'page-attributes', // (menu order, hierarchical must be true to show Parent option)

				//'post-formats',

			),

			'taxonomies' => array( 'category', 'post_tag' ), // add default post categories and tags

			'menu_position' => 5,

			'exclude_from_search' => false,

			'register_meta_box_cb' => 'quote_add_post_type_metabox'

		);

		register_post_type( 'quote', $args );

		//flush_rewrite_rules();



		register_taxonomy( 'quote_category', // register custom taxonomy - category

			'quote',

			array(

				'hierarchical' => true,

				'labels' => array(

					'name' => 'Quote category',

					'singular_name' => 'Quote category',

				)

			)

		);

		register_taxonomy( 'quote_tag', // register custom taxonomy - tag

			'quote',

			array(

				'hierarchical' => false,

				'labels' => array(

					'name' => 'Quote tag',

					'singular_name' => 'Quote tag',

				)

			)

		);

	}

	add_action( 'init', 'quote_create_post_type' );





	function quote_add_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" 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

		?>



		<table class="form-table">

			<tr>

				<th>

					<label>Name</label>

				</th>

				<td>

					<input type="text" name="quote_post_name" class="regular-text" value="<?php echo $quote_post_name; ?>"> 

					<!-- classes: .small-text .regular-text .large-text -->

				</td>

			</tr>

			<tr>

				<th>

					<label>Description</label>

				</th>

				<td>

					<textarea name="quote_post_desc" class="large-text"><?php echo $quote_post_desc; ?></textarea>

				</td>

			</tr>

		</table>

	<?php

	}





	function quote_post_save_meta( $post_id, $post ) { // save the data



		/*

		 * We need to verify this came from our screen and with proper authorization,

		 * because the save_post action can be triggered at other times.

		 */



		if ( ! isset( $_POST['quote_post_noncename'] ) ) { // Check if our nonce is set.

			return;

		}



		// 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

endif; // end of function_exists()





if( ! function_exists( 'view_quotes_posts' ) ) : // output

	function view_quotes_posts($do_shortcode = 1, $strip_shortcodes = 0 ) {



		$args = array(

			'posts_per_page'     => 100,

			'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 ) ) {

				$img = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'thumbnail' );

				$img_url = $img[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( $content );

			}

			if( $strip_shortcodes == 1 ) {

				$content = strip_shortcodes( $content );

			}

			$content = wp_trim_words( $content, 30, '...');

			$content = wpautop( $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; // end of function_exists()

?>

Usage in templates:

<?php

if( function_exists( 'view_quotes_posts' ) ) {

    echo view_quotes_posts();

}

?>

Show list of all not empty custom taxonomies (custom post type categories):

<?php

$tax_name = 'quote_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>';

?>

List of custom post types (archive) can be viewed by such link: http://site.com/quote/

WordPress by default uses the archive template of your theme to display the custom post type archive page - archive.php.

If you want to create a custom archive page for your custom post type, then you would need to create a new file called archive-quote.php.

Example of archive-quote.php file:

<?php

get_header();

if(have_posts()) : while(have_posts()) : the_post();

	the_title();

	echo '<div class="entry-content">';

	the_content();

	echo '</div>';

endwhile; endif;

get_footer();

?>

• register_post_type()
• register_taxonomy()
• register_taxonomy_for_object_type()