WordPress Get Taxonomies
A while back I did a video about the basics of WordPress Taxonomies. Since then I’ve received requests on how to:
- Display taxonomies for each post
- Use taxonomies to organize posts
- Display taxonomies in a drop down list
- Use custom fields to organize posts
- Display custom fields in posts
<?php
// Add RSS links to <head> section
automatic_feed_links();
// Load jQuery
if ( !is_admin() ) {
wp_deregister_script(‘jquery’);
wp_register_script(‘jquery’, (“http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js”), false);
wp_enqueue_script(‘jquery’);
}
// Clean up the <head>
function removeHeadLinks() {
remove_action(‘wp_head’, ‘rsd_link’);
remove_action(‘wp_head’, ‘wlwmanifest_link’);
}
add_action(‘init’, ‘removeHeadLinks’);
remove_action(‘wp_head’, ‘wp_generator’);
if (function_exists(‘register_sidebar’)) {
register_sidebar(array(
‘name’ => ‘Sidebar Widgets’,
‘id’ => ‘sidebar-widgets’,
‘description’ => ‘These are widgets for the sidebar.’,
‘before_widget’ => ‘<div id=”%1$s” class=”widget %2$s”>’,
‘after_widget’ => ‘</div>’,
‘before_title’ => ‘<h2>’,
‘after_title’ => ‘</h2>’
));
}
if (function_exists(‘register_nav_menus’)) {
register_nav_menus(array(‘main-menu’ => ‘Main Navigation’));
}
function catch_that_image() {
global $post, $posts;
$first_img =”;
$output = preg_match_all(‘/<img.+src=[\'”]([^\'”]+)[\'”].*>/i’, $post->post_content, $matches);
$first_img = $matches [1] [0];
if(empty($first_img)){
$first_img = bloginfo(‘template_directory’);
$first_img .= “/image/default.png”;
}
return $first_img;
}
function ntt_create_taxonomies()
{
register_taxonomy( ‘manufacturer’, ‘post’, array( ‘hierarchical’=>false, ‘label’=>’Manufacturer’, ‘query_var’=>true, ‘rewrite’=>true ));
register_taxonomy( ‘item_number’, ‘post’, array( ‘hierarchical’=>false, ‘label’=>’Item Number’, ‘query_var’=>true, ‘rewrite’=>true ));
register_taxonomy( ‘item_type’, ‘post’, array( ‘hierarchical’=>false, ‘label’=>’Item Type’, ‘query_var’=>true, ‘rewrite’=>true ));
}
add_action( ‘init’, ‘ntt_create_taxonomies’, 0);
?>
<div id=”firstSidebar”>
<?php if (function_exists(‘dynamic_sidebar’) && dynamic_sidebar(‘Sidebar Widgets’)) : else : ?>
<!– All this stuff in here only shows up if you DON’T have any widgets active in this zone –>
<div class=”sidebarWidgets”>
<div class=”sidebarTitle”> <h4></h4></div>
<p class=”sidebarExcerpt”>
<a href=”<?php bloginfo(‘rss2_url’); ?>”><img src=”<?php bloginfo(‘template_directory’); ?>/images/rss_logo.png” height=”50px” width=”50px”></a>
<a href=”http://www.twitter.com/newthinktank”><img src=”<?php bloginfo(‘template_directory’); ?>/images/twitter_logo.png” height=”50px” width=”50px”></a>
<a href=”http://www.facebook.com/newthinktank”><img src=”<?php bloginfo(‘template_directory’); ?>/images/facebook_logo.png” height=”50px” width=”50px”></a>
<a href=”http://www.linkedin.com/in/derekbanas”><img src=”<?php bloginfo(‘template_directory’); ?>/images/linkedin_logo.png” height=”50px” width=”50px”></a>
</p>
<div class=”sidebarTitle”></div>
<p class=”sidebarExcerpt”>
<?php wp_list_pages(‘depth=1&title_li=<div class=”sidebarTitle”><h4>Pages</h4></div>’ ); ?>
</p>
<div class=”sidebarTitle”> <h4></h4></div>
<p class=”sidebarExcerpt”>
<img src=”<?php bloginfo(‘template_directory’); ?>/images/ad_sample.png” alt=”Advertising” title=”Advertising” width=”250px” height=”250px” />
</p>
<div class=”sidebarTitle”><h4>Categories</h4></div>
<p class=”sidebarExcerpt”>
<?php wp_list_categories(‘depth=1&title_li=’ ); ?>
</p>
<form name=’ntt_manu’>
<?php
// Function provided by earthmanweb
function get_terms_dropdown($taxonomies, $args){
// Get all values stored in the provided taxonomy
$myterms = get_terms($taxonomies, $args);
// Outputs the dropdown list of taxonomies
// When one is selected the onChange event is triggered and the user changes
// pages
$output =”<select name=’ntt_manu_list’ onChange=’location.href=ntt_manu.ntt_manu_list.options[selectedIndex].value’><option selected>Manufacturers</option>”;
foreach($myterms as $term){
// Get the url for the site
$root_url = get_bloginfo(‘url’);
// Get the taxonomy location
$term_taxonomy=$term->taxonomy;
// Get location of each value stored in the taxonomy
$term_slug=$term->slug;
// Get the proper name for the taxonomy value
$term_name =$term->name;
$link = $root_url.’/index.php/’.$term_taxonomy.’/’.$term_slug;
$output .=”<option value='”.$link.”‘>”.$term_name.” (“.$term->count.”)</option>”;
}
$output .=”</select>”;
return $output;
}
$taxonomies = array(‘manufacturer’);
$args = array(‘orderby’=>’name’,’hide_empty’=>true);
echo get_terms_dropdown($taxonomies, $args);
?>
</form>
</div> <!– End of sidebarWidgets –>
<?php endif; ?>
</div>
SINGLE.PHP
<?php get_header(); ?>
<?php
$ntt_plugin_folder = get_bloginfo(‘wpurl’);
$ntt_plugin_folder .= ‘/wp-content/plugins/NTTFeaturedContent2/’;
$ntt_plugin_page = $ntt_plugin_folder . ‘js/featured_data1.txt’;
$ntt_plugin_style = $ntt_plugin_folder . ‘ntt_fc_style2.css’;
?>
<LINK href=”<?php echo $ntt_plugin_style;?>” rel=”stylesheet” type=”text/css”>
<script type=”text/javascript” src=”<?php echo $ntt_plugin_folder; ?>js/featured_content.js”></script>
<div class=”ntt_featured_content”>
<?php
$ntt_stored_fc = file_get_contents($ntt_plugin_page);
echo $ntt_stored_fc;
?>
</div>
<?php get_sidebar(‘first’); ?>
<div id=”mainContent”>
<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<div class=”articleContent”>
<div <?php post_class() ?> id=”post-<?php the_ID(); ?>”>
<h3 class=”articleTitle”><a href=”<?php the_permalink(); ?>”><?php the_title();?></a></h3><br />
<div class=”entry”>
<p class=”postExcerpt”>
<?php the_content(); ?>
<?php
$ntt_manufacturer = get_the_term_list( $post->ID, ‘manufacturer’, ‘Manufacturer: ‘, ‘, ‘, ”);
$ntt_item_number = get_the_term_list( $post->ID, ‘item_number’, ‘Item Number: ‘, ‘, ‘, ”);
$ntt_item_type = get_the_term_list( $post->ID, ‘item_type’, ‘Item Type: ‘, ‘, ‘, ”);
if (” != $ntt_manufacturer ) {
echo $ntt_manufacturer . “<br />”;
}
if (” != $ntt_item_type ) {
echo $ntt_item_type . “<br />”;
}
if (” != $ntt_item_number ) {
echo $ntt_item_number . “<br />”;
}
?>
<?php
$ntt_key = “Price”;
$ntt_price_meta = get_post_meta($post->ID, $ntt_key, true);
if (” != $ntt_price_meta ) {
echo ‘Price: ‘ .$ntt_price_meta . “<br />”;
}
?>
</p>
<?php wp_link_pages(array(‘before’ => ‘Pages: ‘, ‘next_or_number’ => ‘number’)); ?>
<?php the_tags( ‘Tags: ‘, ‘, ‘, ”); ?>
</div>
</div>
</div>
<?php endwhile; endif; ?>
<div class=”morePosts”>
<?php $ntt_current_post = $post;
global $post;
// Get category for the current post
$ntt_post_categories = get_the_category($post->ID);
// If the post has a category start storing them in an array
if ($ntt_post_categories) {
$ntt_category_ids = array();
foreach($ntt_post_categories as $ntt_indiv_category) $ntt_category_ids[] = $ntt_indiv_category->term_id; // Gets the categories id number
$args=array(
‘category__in’ => $ntt_category_ids,
// Don’t show the current post Must pass array
‘post__not_in’ => array($post->ID),
// Don’t show pages
‘post_type’ => ‘post’,
// Only show published posts
‘post_status’ => ‘publish’,
‘posts_per_page’=> 4 // Number of related posts that will be shown.
);
$my_query = new wp_query( $args );
if( $my_query->have_posts() ) {
echo ‘<div class=”morePosts”><h3>Related Posts</h3>’;
while( $my_query->have_posts() ) {
$my_query->the_post();?>
<div class=”recentPosts”>
<h3 class=”recentTitle”><a href=”<?php the_permalink(); ?>”><?php $ntt_the_title = $post->post_title; echo substr($ntt_the_title, 0, 20); ?></a></h3>
<img src=”<?php echo catch_that_image(); ?>” alt=”<?php the_title(); ?>” width=”150px” height=”150px” class=”recentImage” />
<p class=”recentExcerpt”><?php $ntt_the_excerpt = $post->post_excerpt; echo substr($ntt_the_excerpt, 0, 82); ?>
<a href=”<?php the_permalink(); ?>” class=”clickForMore”>More</a></p>
</div> <!– End of recentPosts div –>
<?
}
echo ‘</div>’;
}
}
$post = $ntt_current_post;
wp_reset_query(); ?>
</div> <!– End of morePosts –>
<?php include (TEMPLATEPATH . ‘/inc/meta.php’ ); ?>
<?php edit_post_link(‘Edit this entry’,”,’.’); ?>
<?php comments_template(); ?>
<br />
</div>
<?php get_footer(); ?>
Hi,
Great tutorial, very clear and easy to follow!
I was looking for a way to integrate my custom taxonomy with the permalink structure.
For Example:
http://www.mysite.com/taxonomy-parent/taxonomy-child/
Is there a way to set up a term in the permalinks dashboard like
%taxonomy% ?
Thanks for an suggestions.
-Ben
I’ll look into that solution. This plugin might get you what you want now though wordpress.org/extend/plugins/permalinks-for-hierarchical-custom-post-types/
Hi. Nice tut! I am working on it and did this:
1) made a music_album_type with:
register_post_type(‘music_album’, $album_args);
Now i have a menu option with which i can fill posts for music albums.
2) register_taxonomy with this code:
register_taxonomy(
‘music_style’,
‘music_album’, //(a)
array(
‘hierarchical’ => false,
‘label’ => ‘Music Style’,
‘query_var’ => true,
‘rewrite’ => true
)
(a) custom post type, so style can be choosen in music_style posts
And in the sidebar:
// all your code
$taxonomies = array(‘music_style’);
Unfortunately this is not working. The select box appears with the taxonomies and number of post. The link is build (eg: index.php/music_style/disco), but the post can not be found and is not shown.
If i choose to do this in the side bar:
$taxonomies = array(‘here a taxonomy which is situated under the posts’);
then it is working fine.
So the taxonomy under my own made ‘music_albums’ posts is not working with the provided code, but it is does with the normal posts.
I made even an taxonomy under the normal posts and that works fine.
I am new to this material and i hope i did explain my problem right. And of course i woould be very happy if you could tell me what goes wrong?
Best,
ProX