   #PHP Manual Array Functions array_udiff_assoc array_udiff

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                              array_udiff_uassoc

   (no version information, might be only in CVS)
   array_udiff_uassoc -- Computes the difference of arrays with
   additional index check. The data is compared by using a callback
   function. The index check is done by a callback function also

Description

   array array_udiff_uassoc ( array array1, array array2 [, array ...,
   callback data_compare_func, callback key_compare_func])

   array_udiff_uassoc() returns an array containing all the values from
   array1 that are not present in any of the other arguments. Note that
   the keys are used in the comparison unlike array_diff() and
   array_udiff(). The comparison of arrays' data is performed by using an
   user-supplied callback : data_compare_func. In this aspect the
   behaviour is opposite to the behaviour of array_diff_assoc() which
   uses internal function for comparison. The comparison of keys
   (indices) is done also by the callback function key_compare_func. This
   behaviour is unlike what array_udiff_assoc() does, since the latter
   compares the indices by using an internal function.

   Example 1. array_udiff_uassoc() example
   <?php
   class cr {
       var $priv_member;
       function cr($val) {
           $this->priv_member = $val;
       }
       function comp_func_cr($a, $b) {
           if ($a->priv_member === $b->priv_member) return 0;
           return ($a->priv_member > $b->priv_member)? 1:-1;
       }
       function comp_func_key($a, $b) {
           if ($a === $b) return 0;
           return ($a > $b)? 1:-1;
       }
   }
   $a = array("0.1" => new cr(9), "0.5" => new cr(12), 0 => new cr(23),
   1=> new cr(4), 2 => new cr(-15),);
   $b = array("0.2" => new cr(9), "0.5" => new cr(22), 0 => new cr(3),
   1=> new cr(4), 2 => new cr(-15),);
   $result = array_udiff_uassoc($a, $b, array("cr", "comp_func_cr"),
   array("cr", "comp_func_key"));
   print_r($result);
   ?>

   The result is:
Array
(
    [0.1] => cr Object
        (
            [priv_member:private] => 9
        )

    [0.5] => cr Object
        (
            [priv_member:private] => 12
        )

    [0] => cr Object
        (
            [priv_member:private] => 23
        )
)

   In our example above you see the "1" => new cr(4) pair is present in
   both arrays and thus it is not in the ouput from the function. Keep in
   mind that you have to supply 2 callback functions.

   For comparison is used the user supplied callback function. It must
   return an integer less than, equal to, or greater than zero if the
   first argument is considered to be respectively less than, equal to,
   or greater than the second.

     Note: Please note that this function only checks one dimension of a
     n-dimensional array. Of course you can check deeper dimensions by
     using, for example, array_udiff_uassoc($array1[0], $array2[0],
     "data_compare_func", "key_compare_func");.

   See also array_diff(), array_diff_assoc(), array_diff_uassoc(),
   array_udiff(), array_udiff_assoc(), array_intersect(),
   array_intersect_assoc(), array_uintersect(), array_uintersect_assoc()
   and array_uintersect_uassoc().
   ______________________________________________________________________

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