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array_intersect_uassoc

Description

The array_intersect_uassoc of Array for PHP computes the intersection of arrays with additional index check, compares indexes by a callback function.

Syntax

array_intersect_uassoc(
    array $array,
    array ...$arrays,
    callable $key_compare_func
): array

Parameters

array

The array to compare from.

arrays

The arrays to compare against.

key_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

Return

Returns the values of array whose values exist in all of the arguments.

Examples

1 · array arrays · one · key_compare_func

<?

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

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

$return = array_intersect_uassoc($array, $arrays, $key_compare_func);

print_r($return);

Array
(
    [a] => 0
)

2 · array arrays · multiple · key_compare_func

<?

function mycallback($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
];
$key_compare_func = "mycallback";

$return = array_intersect_uassoc($array, $arrays1, $arrays2, $key_compare_func);

print_r($return);

Array
(
    [a] => 0
)