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
arrayarray_udiff_uassoc
arrayarray1
arrayarray2
array ...
callbackdata_compare_func
callbackkey_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.
<function>array_udiff_uassoc</function> example
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:
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.
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.