Description:
------------
The array_pop()-function (and most likely, similar array operators) doesn't take immediate arrays anymore, that is, arrays without a variable name. It worked in previous versions, though.

Reproduce code:
---------------
<?php
  $bread = "slice1.slice2.slice3.slice4";
  $last_slice = array_pop(explode(".", $bread));
  echo($last_slice);
?>


Expected result:
----------------
Expect to see: "slice4"

Workaround:
<?php
  $bread = "slice1.slice2.slice3.slice4";
  $slices_array = explode(".", $bread);
  $last_slice = array_pop($slices_array);
  echo($last_slice);
?>

Actual result:
--------------
Fatal error: Only variables can be passed by reference in D:\www\browser\index.php on line 46