* @since 2.7
*
* @param string $file
- * @param callback $callback The callback to run when the hook is called.
+ * @param callback $callback The callback to run when the hook is called. Must be a static method or function.
*/
-function register_uninstall_hook($file, $callback) {
+function register_uninstall_hook( $file, $callback ) {
+ if ( is_array( $callback ) && is_object( $callback[0] ) ) {
+ _doing_it_wrong( __FUNCTION__, __( 'Only a static class method or function can be used in an uninstall hook.' ), '3.1' );
+ return;
+ }
+
// The option should not be autoloaded, because it is not needed in most
// cases. Emphasis should be put on using the 'uninstall.php' way of
// uninstalling the plugin.
* @param string $tag Used in counting how many hooks were applied
* @param callback $function Used for creating unique id
* @param int|bool $priority Used in counting how many hooks were applied. If === false and $function is an object reference, we return the unique id only if it already has one, false otherwise.
- * @param string $type filter or action
* @return string|bool Unique ID for usage as array key or false if $priority === false and $function is an object reference, and it does not already have a uniqe id.
*/
function _wp_filter_build_unique_id($tag, $function, $priority) {