} //next page public function next_page() { $this->page_str .= '下一页'; } //go to page public function go_page() { $str = <<<EOT <select> \t<option>1</option> \t<option>2</option> \t<option>3</option> </select> EOT; $this->page_str .= $str; } //display() public function display_page() { //$this->page_str .= ''; echo $this->page_str; } } //test $p = new Page(); $p->pre_page(); $p->next_page(); $p->go_page(); $p->display_page();