register_post_meta()

参数

$post_type

(string)
(Required)
Post type to register a meta key for. Pass an empty string to register the meta key across all existing post types.

$meta_key

(string)
(Required)
The meta key to register.

$args

(array)
(Required)
Data used to describe the meta key when registered. See register_meta() for a list of supported arguments.