My friend let me look at his source code, and I just got around to it. I would ask him, but he's in vacation at switzerland.
$path = $_SESSION['a']['b'][$_GET['c']];
What exactly does that mean? Does it just concatenate those?
If I sent in Cookie:a=/a/&b=b/ along with ?c=test.php , would the $path var be /a/b/test.php? If not, what would it be equal to?
$_SESSION['a']['b'][$_GET['c']] means a series of steps like the following steps:
$x_ = $_SESSION;
$x_2 = $x_['a'];
$x_3 = $x_2['b'];
$v = $_GET['c'];
$x_4 = $x_3[$v];
and you get and keep $x_4.
Long explanation: get a value under index 'a' from the session array, then get a sub value from that value (which is an array) under the index 'b', and so on.
$_SESSION['a']['b'][$_GET['c']];
means that you are accessing a session variable named 'a'.
Where 'a' is assumed as a multidimensional array, assumed to have a key 'b' where it is also an array, an array assumed to have a key equal to whatever the value of $_GET['c'].
Let's assumed that $_GET['c'] is equal to 'c', so the assumed structure of your array would be:
$_SESSION['a'] = array(
'b' => array(
'c' => "This is the value you are trying to fetch."
)
);
print_r($_SESSION);andecho $_GET['c'];and see if you can work it out.$_SESSIONis an array, the element with keyais accessed, then the element with the keybis accessed withina, finally the$_GETvalue ofcis used to access an element of arrayb. ;)$_GET['c']as a key for their array. Nothing really technical or fancy going on here at all.