title = $title; $this->message = $message; $this->debug_info = $debug_info; } public function html_main() { echo '

', $this->title, '

', nl2br(htmlspecialchars($this->message)), '

'; if (isset($this->debug_info)) { echo '

Debug Info

', htmlspecialchars($this->debug_info), '
'; } echo '
'; } }