Unregisters a meta key from the list of registered keys.
Parameters
$object_typestringrequired- Type of object metadata is for. Accepts
'post','comment','term','user', or any other object type with an associated meta table. $meta_keystringrequired- Metadata key.
$object_subtypestringoptional- The subtype of the object type.
Default:
''
Source
function unregister_meta_key( $object_type, $meta_key, $object_subtype = '' ) {
global $wp_meta_keys;
if ( ! registered_meta_key_exists( $object_type, $meta_key, $object_subtype ) ) {
return false;
}
$args = $wp_meta_keys[ $object_type ][ $object_subtype ][ $meta_key ];
if ( isset( $args['sanitize_callback'] ) && is_callable( $args['sanitize_callback'] ) ) {
if ( ! empty( $object_subtype ) ) {
remove_filter( "sanitize_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['sanitize_callback'] );
} else {
remove_filter( "sanitize_{$object_type}_meta_{$meta_key}", $args['sanitize_callback'] );
}
}
if ( isset( $args['auth_callback'] ) && is_callable( $args['auth_callback'] ) ) {
if ( ! empty( $object_subtype ) ) {
remove_filter( "auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}", $args['auth_callback'] );
} else {
remove_filter( "auth_{$object_type}_meta_{$meta_key}", $args['auth_callback'] );
}
}
unset( $wp_meta_keys[ $object_type ][ $object_subtype ][ $meta_key ] );
// Do some clean up.
if ( empty( $wp_meta_keys[ $object_type ][ $object_subtype ] ) ) {
unset( $wp_meta_keys[ $object_type ][ $object_subtype ] );
}
if ( empty( $wp_meta_keys[ $object_type ] ) ) {
unset( $wp_meta_keys[ $object_type ] );
}
return true;
}
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