Description:
------------
It seems very strange that the [] operator cannot be used on the result of a function.  

Reproduce code:
---------------
function test() {
return array('dog','cat');
}

echo test()[0];  // produces a syntax error.

of course this works fine

class temp{}

function test() {
$o = new $temp;
$temp->foo = 'dog';
}

echo test()->foo; // works


Expected result:
----------------
dog