Description:
------------
array_diff functions compares boolean false as identity (operator "===") and boolean true as equal (operator "==") so behaves inconsistently. It should compare all values in same way and in my opinion it should compare as equals ("==") or have argument (or another mechanism) how to set whether compare by equal or identity.

As example I use array_diff_assoc but I think it will probably behave simmilary with another array realted functions (array_diff%, array_intersect%). In expected result I suppose comparing as equal (operator '==').

In example you can see, that array_diff_assoc behaves in such way that 0 or '0' or '' is not same as false, but 1 or '1' is same as true. So false is compared like '===' and true is compared like '=='. Because 0 is same as '0' and 1 is same as '1' I suppose, that this problem is only for boolean false value.


Test script:
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$arr1 = array('a' => 0,     'b' => 1,    'c' => '0',   'd' => '1',  'e' => '',    'f' => false, 'g' => true, 'h' => 0,   'i' => 1);
$arr2 = array('a' => false, 'b' => true, 'c' => false, 'd' => true, 'e' => false, 'f' => false, 'g' => true, 'h' => '0', 'i' => '1');

var_dump(array_diff_assoc($arr1, $arr2));

Expected result:
----------------
array(0) {
}


Actual result:
--------------
array(2) {
  ["a"]=>
  int(0)
  ["c"]=>
  string(1) "0"
}