delete_metadata_by_mid( string $meta_type, int $meta_id ): bool

1017function delete_metadata_by_mid( $meta_type, $meta_id ) {1018	global $wpdb;1019 1020	// Make sure everything is valid.1021	if ( ! $meta_type || ! is_numeric( $meta_id ) || floor( $meta_id ) != $meta_id ) {1022		return false;1023	}1024 1025	$meta_id = (int) $meta_id;1026	if ( $meta_id <= 0 ) {1027		return false;1028	}1029 1030	$table = _get_meta_table( $meta_type );1031	if ( ! $table ) {1032		return false;1033	}1034 1035	// Object and ID columns.1036	$column    = sanitize_key( $meta_type . '_id' );1037	$id_column = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';1038 1039	/**1040	 * Short-circuits deleting metadata of a specific type by meta ID.1041	 *1042	 * The dynamic portion of the hook name, `$meta_type`, refers to the meta object type1043	 * (blog, post, comment, term, user, or any other type with an associated meta table).1044	 * Returning a non-null value will effectively short-circuit the function.1045	 *1046	 * Possible hook names include:1047	 *1048	 *  - `delete_blog_metadata_by_mid`1049	 *  - `delete_post_metadata_by_mid`1050	 *  - `delete_comment_metadata_by_mid`1051	 *  - `delete_term_metadata_by_mid`1052	 *  - `delete_user_metadata_by_mid`1053	 *1054	 * @since 5.0.01055	 *1056	 * @param null|bool $delete  Whether to allow metadata deletion of the given type.1057	 * @param int       $meta_id Meta ID.1058	 */1059	$check = apply_filters( "delete_{$meta_type}_metadata_by_mid", null, $meta_id );1060	if ( null !== $check ) {1061		return (bool) $check;1062	}1063 1064	// Fetch the meta and go on if it's found.1065	$meta = get_metadata_by_mid( $meta_type, $meta_id );1066	if ( $meta ) {1067		$object_id = (int) $meta->{$column};1068 1069		/** This action is documented in wp-includes/meta.php */1070		do_action( "delete_{$meta_type}_meta", (array) $meta_id, $object_id, $meta->meta_key, $meta->meta_value );1071 1072		// Old-style action.1073		if ( 'post' === $meta_type || 'comment' === $meta_type ) {1074			/**1075			 * Fires immediately before deleting post or comment metadata of a specific type.1076			 *1077			 * The dynamic portion of the hook name, `$meta_type`, refers to the meta1078			 * object type (post or comment).1079			 *1080			 * Possible hook names include:1081			 *1082			 *  - `delete_postmeta`1083			 *  - `delete_commentmeta`1084			 *1085			 * @since 3.4.01086			 *1087			 * @param int $meta_id ID of the metadata entry to delete.1088			 */1089			do_action( "delete_{$meta_type}meta", $meta_id );1090		}1091 1092		// Run the query, will return true if deleted, false otherwise.1093		$result = (bool) $wpdb->delete( $table, array( $id_column => $meta_id ) );1094 1095		// Clear the caches.1096		wp_cache_delete( $object_id, $meta_type . '_meta' );