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Setting up a basic custom taxonomy

From: Create an Online Portfolio with WordPress

Video: Setting up a basic custom taxonomy

Creating a basic custom taxonomy is not all that different from creating a basic custom post type. All you have to do is create a new function that defines the new custom taxonomy and define a name and type of taxonomy and WordPress will do the rest for you. And of course, all this is done in that post_types.php file. So first let's open it and scroll down to the bottom where we'll start it, and then we're going to add to new custom taxonomy functions. Now like before, I added them into the code snippets file, so it's easier for you to manage, because it's a lot of text and I don't want you to have to write everything.

Setting up a basic custom taxonomy

Creating a basic custom taxonomy is not all that different from creating a basic custom post type. All you have to do is create a new function that defines the new custom taxonomy and define a name and type of taxonomy and WordPress will do the rest for you. And of course, all this is done in that post_types.php file. So first let's open it and scroll down to the bottom where we'll start it, and then we're going to add to new custom taxonomy functions. Now like before, I added them into the code snippets file, so it's easier for you to manage, because it's a lot of text and I don't want you to have to write everything.

So if you go to Chapter 4, 02, you'll find In posttypes.php. Here we have the complete function. So I'll copy it out, paste it in, and then we'll take a closer look. As before it starts off with the comment that explains what this is. This is a function that creates custom taxonomies. Unlike the custom post types, this is one function that will create all the taxonomies. So as we add new taxonomies, we're adding them inside the same function, and you'll see how that works in a bit.

As before, it starts within add_action that adds a new action at init, which is one where it starts, and the function that's being called is cooking_create_taxonomies, which is the function directly below. Inside the cooking_create_taxonomies function, we have a new register_taxonomy function that has an array that displays a specific taxonomy. I've commented in what taxonomy it is because, as I said, we'll add multiple taxonomies within the same function. So I've added Meal type because that's the taxonomy, and then I've added the basic array.

So you'll see it says resister_taxonomy. It defines the taxonomy name as meal-type. Now this is the machine name, so this is what WordPress will refer to. And then inside there is an array that points to whether or not it's a hierarchical taxonomy. It is, because it's the Meal type. It gives it a label, so Meal type. It has a singular_name, 'Meal type', show_ ui, which is the UI for the taxonomy itself, true, query_var => true, so you can query it, and then finally rewrite and then I set the slug to meal-type.

So if you remember back to when we created the post types, you'll see that the stuff is pretty much the same. It's just that it's inside a register_ taxonomy function instead of create a new post_type function. If I save this now and go to WordPress > Admin and I reload it, you'll see that nothing has changed. There is simple reason for this. The taxonomy is a sorting system for a post type, but so far if we look at our function, we haven't assigned this taxonomy to a post type yet.

Although the taxonomy exists, it's not hook to anything, so we can't organize anything based on it. That's the next step.

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This video is part of

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Create an Online Portfolio with WordPress

40 video lessons · 28561 viewers

Morten Rand-Hendriksen
Author

 
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  1. 6m 28s
    1. Welcome
      58s
    2. Using the exercise files
      3m 54s
    3. Using the code snippets file
      1m 36s
  2. 8m 31s
    1. What is an online portfolio?
      2m 43s
    2. Tour of the finished project
      3m 15s
    3. Setting up a WordPress development environment
      2m 33s
  3. 16m 10s
    1. Creating site architecture
      5m 1s
    2. Creating a child theme
      6m 7s
    3. Creating an external file to manage functions separately from the theme
      5m 2s
  4. 25m 26s
    1. What is a custom post type?
      2m 14s
    2. Setting up a custom post type
      6m 39s
    3. Adding advanced variables to the custom post type
      3m 35s
    4. Advanced custom post type functionalities
      4m 29s
    5. Changing the menu position of the custom post type
      3m 19s
    6. Adding a custom post type icon
      5m 10s
  5. 22m 8s
    1. What are custom taxonomies?
      3m 34s
    2. Setting up a basic custom taxonomy
      2m 52s
    3. Hooking a custom taxonomy to a post type
      3m 13s
    4. Adding advanced variables to a custom taxonomy
      3m 9s
    5. Using hierarchical and nonhierarchical custom taxonomies
      5m 54s
    6. Using custom taxonomies in admin
      3m 26s
  6. 25m 40s
    1. Populating content into the custom post types
      10m 54s
    2. Uploading videos to YouTube
      2m 22s
    3. Embedding YouTube videos in a custom post type
      4m 23s
    4. Uploading videos to WordPress
      8m 1s
  7. 39m 47s
    1. Creating custom post type templates
      6m 50s
    2. Adding taxonomy info to the custom post type template
      9m 13s
    3. Creating conditional custom taxonomy links
      4m 46s
    4. Handling multiple post type templates: Individual templates
      6m 25s
    5. Handling multiple post type templates: Consolidating everything in one file
      6m 21s
    6. Handling multiple post type templates: Making custom post types the default
      6m 12s
  8. 15m 23s
    1. Creating an index page for a custom post type
      8m 10s
    2. Creating a custom taxonomy index page
      7m 13s
  9. 12m 3s
    1. Creating a custom footer sidebar template
      6m 58s
    2. Displaying a list of links to the latest custom post type posts
      5m 5s
  10. 14m 58s
    1. Creating static pages for the front and the blog
      4m 54s
    2. Populating the menu with new index pages
      4m 52s
    3. Creating a contact page with a contact form
      5m 12s
  11. 5m 55s
    1. Including the abstraction layer in other stock themes
      5m 55s
  12. 1m 22s
    1. Next steps
      1m 22s

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