Contents
What are post meta?
Post meta data is information about a post that is not part of the actual content. This includes information like post date, author, categories and tags, or custom taxonomies. If used correctly, post meta data can increase page views, improve user experience, and make your site look more professional.
How do I add a meta box to a custom post type in WordPress?
To add a meta box to a number of post types screens – post , page and a book custom post type; create an array of the post types, iterate over the array and use add_meta_box() to add the meta box to them.
How do I get a post meta value?
You can get the post meta value, page, products and any custom post type meta field value using get_post_meta functions. It’s accept three parameters: $post_id: the post ID is required. You should pass the post ID of that you want to fetch the meta field value.
How to update post meta value as array?
The concept here is a bit different; you will several entries in the database with the same meta key, so you need to use add_post_meta () instead of update_post_meta () in order to add a new entry for each value. Now, you can use get_post_meta () with the third parameter set to false (it is the default value, so you can omit it):
How to differentiate between Meta fields in WordPress?
Use the $prev_value parameter to differentiate between meta fields with the same key and post ID. If the meta field for the post does not exist, it will be added and its ID returned. Can be used in place of add_post_meta (). (int) (Required) Post ID. (string) (Required) Metadata key. (mixed) (Required) Metadata value.
What to do if the meta field does not exist?
If the meta field for the post does not exist, it will be added and its ID returned. Can be used in place of add_post_meta (). (int) (Required) Post ID.
What is the meta ID of the function?
(int|bool) Meta ID if the key didn’t exist, true on successful update, false on failure or if the value passed to the function is the same as the one that is already in the database.