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registered_meta_key_exists › WordPress Function

Since4.6.0
已弃用n/a
› registered_meta_key_exists ( $object_type, $meta_key, $object_subtype = '' )
参数: (3)
  • (string) $object_type Type of object metadata is for. Accepts 'blog', 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
    Required: Yes
  • (string) $meta_key Metadata key.
    Required: Yes
  • (string) $object_subtype Optional. The subtype of the object type. Default empty string.
    Required: No
    默认: (empty)
返回:
  • (bool) True if the meta key is registered to the object type and, if provided,
    the object subtype. False if not.
定义在:
文档:
Change Log:
  • 4.9.8

Checks if a meta key is registered.



Related Functions: get_registered_meta_keys, unregister_meta_key, register_meta, _wp_register_meta_args_whitelist, get_registered_metadata

源码 

function registered_meta_key_exists( $object_type, $meta_key, $object_subtype = '' ) {
	$meta_keys = get_registered_meta_keys( $object_type, $object_subtype );

	return isset( $meta_keys[ $meta_key ] );
}