8 views 
Summery Summery
Retrieves a list of registered meta keys for an object type.
Syntax Syntax
Parameters Parameters
- $object_type
-
(Required) Type of object metadata is for. Accepts 'post', 'comment', 'term', 'user', or any other object type with an associated meta table.
- $object_subtype
-
(Optional) The subtype of the object type.
Default value: ''
Return Return
(string[]) List of registered meta keys.
Source Source
File: wp-includes/meta.php
$object_subtype = ! empty( $args['object_subtype'] ) ? $args['object_subtype'] : '';
// If `auth_callback` is not provided, fall back to `is_protected_meta()`.
if ( empty( $args['auth_callback'] ) ) {
if ( is_protected_meta( $meta_key, $object_type ) ) {
$args['auth_callback'] = '__return_false';
} else {
$args['auth_callback'] = '__return_true';
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Changelog Changelog
| Version | Description |
|---|---|
| 4.9.8 | The $object_subtype parameter was added. |
| 4.6.0 | Introduced. |
