array_uintersect_uassoc

Description
Syntax
Examples
Links

Description

The array_uintersect_uassoc of Array for PHP computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions.

Syntax

array_uintersect_uassoc(
    array $array1,
    array ...$arrays,
    callable $value_compare_func,
    callable $key_compare_func
): array

Parameters

value_compare_func

The comparison function 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.

callback(
    mixed $a,
    mixed $b
): int

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.

Return

Returns an array containing all the values of array1 that are present in all the arguments.

Examples

1 · array arrays · one · value_compare_func

<?

function mycallback1($mya, $myb)
{
    return $mya <=> $myb;
}
function mycallback2($mya, $myb)
{
    return $mya <=> $myb;
}

$array =
[
    "a" => 0,
    "b" => 1,
    "c" => 2,
    "d" => 3
];
$arrays =
[
    "a" => 0,
    "b" => 4,
    "e" => 2,
    "f" => 5
];
$value_compare_func = "mycallback1";
$key_compare_func = "mycallback2";

$return = array_uintersect_uassoc($array, $arrays, $value_compare_func, $key_compare_func);

print_r($return);

Array
(
    [a] => 0
)

2 · array arrays · multiple · value_compare_func

<?

function mycallback1($mya, $myb)
{
    return $mya <=> $myb;
}
function mycallback2($mya, $myb)
{
    return $mya <=> $myb;
}

$array =
[
    "a" => 0,
    "b" => 1,
    "c" => 2,
    "d" => 3
];
$arrays1 =
[
    "a" => 0,
    "b" => 4,
    "e" => 2,
    "f" => 5
];
$arrays2 =
[
    "a" => 0,
    "b" => 4,
    "e" => 2,
    "f" => 5
];
$value_compare_func = "mycallback1";
$key_compare_func = "mycallback2";

$return = array_uintersect_uassoc($array, $arrays1, $arrays2, $value_compare_func, $key_compare_func);

print_r($return);

Array
(
    [a] => 0
)