Array Funzioni
PHP Manual

array_udiff_assoc

(PHP 5)

array_udiff_assocComputes 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 $data_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.

data_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), => new cr(23), 1=> new cr(4), => new cr(-15),);
$b = array("0.2" => new cr(9), "0.5" => new cr(22), => new cr(3), 1=> new cr(4), => 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 Funzioni
PHP Manual