function debug_message( $msg ) {
            if ( empty( $this->options["{$this->prefix}debug"] ) ) $this->options["{$this->prefix}debug"] = '';
            $this->options["{$this->prefix}debug"] = date( 'Y-m-d H:i:s' ) . " {$msg}\n" . $this->options["{$this->prefix}debug"];
            if ( $this->strlen( $this->options["{$this->prefix}debug"] ) > 2048 ) {
                $end = $this->strrpos( $this->options["{$this->prefix}debug"], "\n" );