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array_udiff

(PHP 5)

array_udiffComputes the difference of arrays by using a callback function for data comparison

설명

array array_udiff ( array $array1 , array $array2 [, array $ ... ], callback $data_compare_func )

Computes the difference of arrays by using a callback function for data comparison. This is unlike array_diff() which uses an internal function for comparing the data.

인수

array1

The first array.

array2

The second array.

data_compare_func

The callback comparison function.

The user supplied callback function is used for comparison. It 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.

반환값

Returns an array containing all the values of array1 that are not present in any of the other arguments.

예제

Example #1 array_udiff() 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),);

$result array_udiff($a$b, array("cr""comp_func_cr"));
print_r($result);
?>

위 예제의 출력:

Array
(
    [0.5] => cr Object
        (
            [priv_member:private] => 12
        )

    [0] => cr Object
        (
            [priv_member:private] => 23
        )

)

주의

Note: Please note that this function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_udiff($array1[0], $array2[0], "data_compare_func");.

참고


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