Description:
------------
When you try to use array_intersect in combination with a different Function, it leads to a strange Error Message.

The Reproduce Code give the Error while the following does not:
<?php
$array1 = array('foo', 'bar', 'test');
$array2 = array('foo', 'me' );
$result = array_intersect( $array1, $array2 );
var_dump( array_shift( $result ) );
?>

And as far as array_intersect retuns an Array (a Variable ;o) this Error is a little bit strange.

Reproduce code:
---------------
<?php
$array1 = array('foo', 'bar', 'test');
$array2 = array('foo', 'me' );
var_dump( array_shift( array_intersect( $array1, $array2 ) ) );
?>

Expected result:
----------------
webdev# php /htdocs/beta.webdev/succont.Unitized/test.php
string(3) "foo"

Actual result:
--------------
webdev# php /htdocs/beta.webdev/succont.Unitized/test.php
PHP Fatal error:  Only variables can be passed by reference in /usr/local/htdocs/beta.webdev/succont.Unitized/test.php on line 4