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array_udiff_assoc

array_udiff_assoc

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

array **array_udiff_assoc** array $array array $arrays callable $value_compare_func

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

Opmerking: > 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");

arrayThe first array.

arraysArrays to compare against.

value_compare_func

returns an

containing all the values from that are not present in any of the other arguments. Note that the keys are used in the comparison unlike and . The comparison of arrays' data is performed by using an user-supplied callback. In this aspect the behaviour is opposite to the behaviour of which uses internal function for comparison. array_udiff_assoc``array``array``array_diff``array_udiff``array_diff_assoc

Voorbeeld: example

<?php
class cr {
    private $priv_member;
    function __construct($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);
?>

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 pair is present in both arrays and thus it is not in the output from the function. "1" =&gt; new cr(4)

array_diff``array_diff_assoc``array_diff_uassoc``array_udiff``array_udiff_uassoc``array_intersect``array_intersect_assoc``array_uintersect``array_uintersect_assoc``array_uintersect_uassoc

Vorige ← array_sum Volgende array_udiff_uassoc →

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