Question

I just ask if it is possible to get keys from $_GET …

I want to do a switch statement like

switch($_GET key)  //here I don't know
{
   case "login": .... break;   //if "login" key exists in $_GET then show page.
   ....
}

Sorry for idiot question

Answer 1

array_keys(); will return an assoc array of keys from the passed param.

$arrKeys = array_keys($_GET);//$arrKeys will now contain all keys of $_GET (as an array)

Take a look at: array_keys()

If you already know the key, and want the value of a specific element from the key, do this:

echo $_GET['myKey'];//which will print the value of the 'myKey' element