registered_meta_key_exists() WordPress Function
The registered_meta_key_exists() function checks if a meta key has been registered. This function can be used in conjunction with the get_registered_meta_keys() function to check if a specific key has been registered.
registered_meta_key_exists( string $object_type, string $meta_key, string $object_subtype = '' ) #
Checks if a meta key is registered.
Parameters
- $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: ''
Return
(bool) True if the meta key is registered to the object type and, if provided, the object subtype. False if not.
Source
File: wp-includes/meta.php
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 ] );
}
Expand full source codeCollapse full source codeView on TracView on GitHub
Changelog
| Version | Description |
|---|---|
| 4.9.8 | The $object_subtype parameter was added. |
| 4.6.0 | Introduced. |