Taxonomies Archives - Page 2 of 2

Show Taxonomies in Custom Post Type Admin

How did I not post this yet? If you have taxonomies tied to your Custom Post Types then you probably want those taxonomies to show up in the admin listing of those post types. Here is the code needed to do that.

/**
 * Show the taxonomies on the admin page
 */
add_filter( 'manage_taxonomies_for_post-type_columns', 'jb_show_cpt_taxonomy' );
function jb_show_taxonomy_taxonomy( $taxonomies ) {
    $taxonomies[] = 'tax-slug';
    return $taxonomies;
}

/**
 * Setup a dropdown to allow filtering by taxonomy in the admin
 */
add_action( 'restrict_manage_posts', 'jb_add_taxonomy_filters' );
function jb_add_taxonomy_filters() {
	global $typenow;
 
	// must set this to the post type you want the filter(s) displayed on
	if( $typenow == 'post-type' ){
 		$taxonomies = array('tax-slug');
		foreach ($taxonomies as $tax_slug) {
			$tax_obj = get_taxonomy($tax_slug);
			$tax_name = $tax_obj->labels->name;
			$terms = get_terms($tax_slug);
			if(count($terms) > 0) {
				echo "<select name='$tax_slug' id='$tax_slug' class='postform'>";
				echo "<option value=''>Show All $tax_name</option>";
				foreach ($terms as $term) { 
					echo '<option value='. $term->slug, $_GET[$tax_slug] == $term->slug ? ' selected="selected"' : '','>' . $term->name .' (' . $term->count .')</option>'; 
				}
				echo "</select>";
			}
		}
	}
}

/**

* Show the taxonomies on the admin page

add_filter( 'manage_taxonomies_for_post-type_columns', 'jb_show_cpt_taxonomy' );

function jb_show_taxonomy_taxonomy( $taxonomies ) {

$taxonomies[] = 'tax-slug';

return $taxonomies;

}

/**

* Setup a dropdown to allow filtering by taxonomy in the admin

add_action( 'restrict_manage_posts', 'jb_add_taxonomy_filters' );

function jb_add_taxonomy_filters() {

global $typenow;

// must set this to the post type you want the filter(s) displayed on

if( $typenow == 'post-type' ){

$taxonomies = array('tax-slug');

foreach ($taxonomies as $tax_slug) {

$tax_obj = get_taxonomy($tax_slug);

$tax_name = $tax_obj->labels->name;

$terms = get_terms($tax_slug);

if(count($terms) > 0) {

echo "<select name='$tax_slug' id='$tax_slug' class='postform'>";

echo "<option value=''>Show All $tax_name</option>";

foreach ($terms as $term) {

echo '<option value='. $term->slug, $_GET[$tax_slug] == $term->slug ? ' selected="selected"' : '','>' . $term->name .' (' . $term->count .')</option>';

}

echo "</select>";

}

This has been posted on various sites around the web so I cannot take credit for it, but I need it all the time and figured I would stick it here so I can find it easier.

CPT Taxonomy Function

I find myself creating taxonomies for a lot of my custom port types. I went ahead and setup a helper function to make it easier for me to create these taxonomies. A lot more could be done with this, but I find it covers 90% of what I need.

/**
 * Create a taxonomy for a CPT
 * @param string taxonomy slug
 * @param string CPT slug
 * @param string Taxonomy Menu / Page Title
 * @param array  Overwrite the rewrite
 */
function jb_register_taxonomy($tax_name = '', $post_type = '', $menu_title = '', $rewrite = array()){
        
        if(empty($rewrite)){
		$rewrite = array( 'slug' => $tax_name );
	}

	register_taxonomy(
		$tax_name,
		$post_type,
		array(
			'label' => __( $menu_title ),
			'rewrite' => $rewrite, 
			'capabilities' => array(
				'assign_terms' => 'edit_posts',
				'edit_terms' => 'edit_posts'
			),
			'hierarchical' => true
		)
	);
}

//usage
jb_register_taxonomy('taxonomy-slug', 'post-type', 'Taxonomy Title');

/**

* Create a taxonomy for a CPT

* @param string taxonomy slug

* @param string CPT slug

* @param string Taxonomy Menu / Page Title

* @param array Overwrite the rewrite

function jb_register_taxonomy($tax_name = '', $post_type = '', $menu_title = '', $rewrite = array()){

if(empty($rewrite)){

$rewrite = array( 'slug' => $tax_name );

}

register_taxonomy(

$tax_name,

$post_type,

array(

'label' => __( $menu_title ),

'rewrite' => $rewrite,

'capabilities' => array(

'assign_terms' => 'edit_posts',

'edit_terms' => 'edit_posts'

'hierarchical' => true

)

);

}

//usage

jb_register_taxonomy('taxonomy-slug', 'post-type', 'Taxonomy Title');

Add Taxonomy Term Programmatically

Recently we had a client who wanted the ability to add new taxonomy terms from the front end of their site. This turned out to be pretty easy using the following code.

//here we take the term name from the client and use the wp_insert_terms() function to add this term to our 'taxonomy'
$new_term = wp_insert_term(
			$_POST['new_term'], // the term 
			'taxonomy', // the taxonomy
			array(
			 	'slug' => sanitize_title_with_dashes($_POST['new_term'], '', 'save') //this function will clean and save our term name as a url safe slug
			)
	    );

//this part is not needed to create the term, but in our use case this new term is also being applied to a post
$tag = array( $new_term['term_id'] );
wp_set_post_terms( $post_id, $tag, 'taxonomy' );

//here we take the term name from the client and use the wp_insert_terms() function to add this term to our 'taxonomy'

$new_term = wp_insert_term(

$_POST['new_term'], // the term

'taxonomy', // the taxonomy

array(

'slug' => sanitize_title_with_dashes($_POST['new_term'], '', 'save') //this function will clean and save our term name as a url safe slug

)

);

//this part is not needed to create the term, but in our use case this new term is also being applied to a post

$tag = array( $new_term['term_id'] );

wp_set_post_terms( $post_id, $tag, 'taxonomy' );

Obviously this is just the bare minimum required. You are on your own for validation and such.