'Please do not access the superglobal $_GET array directly'

I downloaded an IDE called NetBeans to develop a PHP program. When I entered the commonly used $name = $_GET['name'];, I received a warning: Please do not directly access the super-global $_GET array. Please change it. Use some filtering functions (such as filter_input(), conditions with is_*() functions, etc.) . Only then did I realize that my usual approach was not standardized. In fact, the warning can be eliminated by changing it to the following form:

<code>$name = "";
if(is_string($_GET['name'])){
	$name = strval($_GET['name']);
}</code>

Since the programming language I use is relatively complicated, sometimes I don’t download a special IDE. For windows, I usually just use Hidemaru and Editplus. type editor; while Mac is more lazy and uses Xcode directly. But now I feel that NetBeans is really good, and it helped me realize this irregular writing method. It seems that in the future we should follow the saying "If a worker wants to do his job well, he must first sharpen his tools."

The above introduces "Please do not directly access the super-global $_GET array", including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.