Add custom taxonomy fields when creating a new taxonomy

Edit: Important note for WordPress v4.4 onward This question used a great workaround for the lack of real term meta in older versions of WordPress, but since the release of WordPress v4.4, real term meta has been introduced, and that’s definitely the way to go now. Here’s a post that looks like a good starting … Read more

Automatically fill custom field value on post publish/update

I’ve searched around a bit, and I’m having trouble finding an answer to this question. What I’m trying to do is automatically fill a custom field when a post (custom post type) is updated or published. Ideally the completed script will call out to an API and fill the custom field with the resulting information whenever a post is created or updated. For right now though, I’m just trying to automatically fill my custom field with a simple string for testing. Here’s my code: