registered_meta_key_exists()

参数

$object_type

(string)
(Required)
Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.

$meta_key

(string)
(Required)
Metadata key.

$object_subtype

(string)
(Optional)
The subtype of the object type.

Default value: ''