array_udiff_assoc

(PHP 5)

array_udiff_assoc — Computes the difference of arrays with additional index check, compares data by a callback function

Opis

array array_udiff_assoc ( array $array1 , array $array2 [, array $ ... ], callable $data_compare_func )

Computes the difference of arrays with additional index check, compares data by a callback function.

Informacja: 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");.

Parametry

array1: The first array.
array2: The second array.
data_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.

int callback ( mixed $a, mixed $b )

Zwracane wartości

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.

Przykłady

Przykład #1 array_udiff_assoc() example


<?php
class cr {
    private $priv_member;
    function cr($val)
    {
        $this->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);
?>

Powyższy przykład wyświetli:

Array
(
    [0.1] => 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.

Zobacz też:

array_diff() - Zwraca różnice pomiędzy tablicami
array_diff_assoc() - Oblicza różnicę między tablicami z dodatkowym sprawdzaniem kluczy
array_diff_uassoc() - Computes the difference of arrays with additional index check which is performed by a user supplied callback function
array_udiff() - Computes the difference of arrays by using a callback function for data comparison
array_udiff_uassoc() - Computes the difference of arrays with additional index check, compares data and indexes by a callback function
array_intersect() - Zwraca przecięcie tablic
array_intersect_assoc() - Wylicza przecięcie tablic z dodatkowym sprawdzaniem indeksów
array_uintersect() - Computes the intersection of arrays, compares data by a callback function
array_uintersect_assoc() - Oblicza przecięcie tablic z dodatkowym sprawdzaniem indeksów, porównując dane przez funkcję zwrotną
array_uintersect_uassoc() - Computes the intersection of arrays with additional index check, compares data and indexes by a callback functions