Description:
------------
when 2-d array is passed as argument to array_intersect() as first argument, it emits notices, which is expected because it expects an 1 dimensional array to be passed. The no. of notices that it emits when 2-d array is passed is more than expected number of. I suspect that this behavior is wrong. 

for example when the passed 2-d array has two sub arrays then two notices are expected but the number of emitted notices are more than 2 and that cannot be co-related. 

Please note that this behavior is only noticed on php6 with error_reporting = E_ALL



Reproduce code:
---------------
<?php
$arr1 = array (
  array(1, 2, "hello", 'world'),
  array(1, 2, 3, 4)
);

$arr2 = array (1 => "one", 2 => "two", 3 => "three");

var_dump( array_intersect($arr1, $arr2) );
?>


Expected result:
----------------
Notice: Array to string conversion in %s on line %d

Notice: Array to string conversion in %s on line %d



Actual result:
--------------
Notice: Array to string conversion in %s on line %d

Notice: Array to string conversion in %s on line %d

Notice: Array to string conversion in %s on line %d

Notice: Array to string conversion in %s on line %d