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array_diff_uassoc

Description

The array_diff_uassoc of Array for PHP computes the difference of arrays with additional index check which is performed by a user supplied callback function.

Syntax

array_diff_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 an array containing all the entries from array that are not present in any of the other arrays.

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";

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

print_r($return);

Array
(
    [b] => 1
    [c] => 2
    [d] => 3
)

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";

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

print_r($return);

Array
(
    [b] => 1
    [c] => 2
    [d] => 3
)