public function check_name_custom_field($data) { global $mf_domain; $name = $data['field_name']; $post_type = $data['post_type']; $id = $data['field_id']; $resp = array('success' => 1); $check = mf_custom_fields::check_group($name, $post_type, $id); if ($check) { $resp = array('success' => 0, 'msg' => __('The name of Field exist in this post type, Please choose a different name.', $mf_domain)); } echo json_encode($resp); }