array_udiff_assoc

(PHP 5)

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

Descrizione

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

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

Nota: 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");.

Elenco dei parametri

array1: The first array.
array2: The second array.
value_compare_func: La funzione di confronto deve restituire un intero minore, uguale o maggiore di zero se il primo argomento è considerato essere minore, uguale o maggiore del secondo.

int callback ( mixed $a, mixed $b )

Valori restituiti

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.

Esempi

Example #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);
?>

Il precedente esempio visualizzerà:

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.

Vedere anche:

array_diff() - Calcola la differenza di due o più array
array_diff_assoc() - Calcola la differenza tra due o più array con un ulteriore controllo sull'indice
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() - Calcola l'intersezione degli arrays
array_intersect_assoc() - Calcola l'intersezione degli array con un ulteriore controllo sugli indici
array_uintersect() - Computes the intersection of arrays, compares data by a callback function
array_uintersect_assoc() - Computes the intersection of arrays with additional index check, compares data by a callback function
array_uintersect_uassoc() - Computes the intersection of arrays with additional index check, compares data and indexes by a callback functions