以下代码执行结果为：（ ）";?>

解析:嗯，你可以使用 PHP 中任何一种输出语句，包括 echo、print、printf，大部分人都使用如下例的 echo：</br>echo “My string $variable”;你也可以使用这种方法：</br>echo <<<ENDThis text is written to the screen as output and this $variable is parsed too. If you wanted you can have <span> HTML tags in here as well.</span> The END; remarks must be on a line of its own, and can’t contain any extra white space.END;