WordPress - use taxonomy in permalink URL #wordpress #permalink

WordPress - use taxonomy in permalink URL.php

<?php
// https://wordpress.org/support/topic/how-to-add-custom-taxonomy-in-custom-post-type-permalink

// Create Asset Custom Post Type
function create_the_asset_posttype() {
  $labels = array(
    ...
    'name' => __( 'Asset' ),
  );  
  $args = array(
    ...
    'taxonomies'          => array( 'campaign' ),
    'show_admin_column'   => true,
    'rewrite'             => array('slug' => 'asset/%campaign%'),
  );
  register_post_type( 'asset', $args );
}
add_action( 'init', 'create_the_asset_posttype', 0 );


// Custom Post Type Texonomies
function create_the_asset_taxonomy() {  
  register_taxonomy(  
    'campaign', //The name of the taxonomy. 
    'asset', //post type name
    array(  
      'hierarchical' =>'asset', // name of CPT  
      'label' => 'Campaigns',  //Display name
      'query_var' => true,
      'has_archive' => true,
      'rewrite' => array('slug' => 'asset')
    )  
  );  
}  
add_action( 'init', 'create_the_asset_taxonomy' );


// functions.php
function wpa_course_post_link( $post_link, $id = 0 ) {
  $post = get_post($id);  
  if ( is_object( $post ) ) {
    $terms = wp_get_object_terms( $post->ID, 'campaign' );
    if ( $terms ) {
      return str_replace( '%campaign%' , $terms[0]->slug , $post_link );
    }
  }
  return $post_link;  
}
add_filter( 'post_type_link', 'wpa_course_post_link', 1, 3 );