array_udiff_assoc
Computes the difference of arrays with additional index check, compares data by a callback function
&reftitle.description;
arrayarray_udiff_assoc
arrayarray1
arrayarray2
array...
callablevalue_compare_func
Computes the difference of arrays with additional index check, compares
data by a callback function.
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_assoc($array1[0], $array2[0], "some_comparison_func");.
&reftitle.parameters;
array1
The first array.
array2
The second array.
value_compare_func
&return.callbacksort;
&callback.cmp;
&reftitle.returnvalues;
array_udiff_assoc 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. In this aspect the behaviour is opposite to the behaviour of
array_diff_assoc which uses internal function for
comparison.
&reftitle.examples;
<function>array_udiff_assoc</function> example
priv_member = $val;
}
static function comp_func_cr($a, $b)
{
if ($a->priv_member === $b->priv_member) return 0;
return ($a->priv_member > $b->priv_member)? 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),);
$result = array_udiff_assoc($a, $b, array("cr", "comp_func_cr"));
print_r($result);
?>
]]>
&example.outputs;
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 output from the
function.
&reftitle.seealso;
array_diff
array_diff_assoc
array_diff_uassoc
array_udiff
array_udiff_uassoc
array_intersect
array_intersect_assoc
array_uintersect
array_uintersect_assoc
array_uintersect_uassoc