为$ _GET变量分配一个新值

Question

We always retrieve the value in a $_GET['var'], but is it possible to assign a value as well? I have a php page where at one point, through ajax, I want to stay on the same page but change the query string or do an assignment like this:

$_GET['myvar'] = 'newvalue';

Is this possible?

Answer 1

$_GET is just like a regular array. The only difference is that the keys of this array will be automatically populated with values that come with the request using HTTP GET. They are called superglobals because they are automatically and globally available anywhere in your script, other wise they behave just like regular arrays.

So if you have a request like mypage.php?key=value, PHP automatically does something equal to this for you:

$_GET['key'] = 'value';

And just like any regular array, you can overwrite it with a different value. However I really do not see a use case for that unless you are doing some testing or some really weird thingy..