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Post meta (custom fields) (category)

add_post_meta()

Adds meta field to the specified post.

delete_post_meta()

Remove metadata matching criteria from a post.

get_post_custom()

Retrieve post meta fields, based on post ID.

get_post_custom_keys()

Retrieve meta field names for a post.

get_post_custom_values()

Retrieve values for a custom post field.

get_post_meta()

Gets the value of the specified custom field of the post. Also can get an array of all post meta fields.

the_meta()

Display list of post custom fields.

update_post_meta()

Update post meta field based on post ID.