array_udiff_assoc

(PHP 5)

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

Descrierea

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.

Notă: 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");.

Parametri

array1

The first array.

array2

The second array.

value_compare_func

Funcția de comparare trebuie să întoarcă un întreg mai mic, egal cu sau mai mare decât zero dacă primul argument este considerat respectiv mai mic, egal cu sau mai mare decât al doilea argument.

int callback ( mixed $a, mixed $b )

Valorile întoarse

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.

Exemple

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);
?>

Exemplul de mai sus va afișa:

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.

Vedeți de asemenea

  • array_diff() - Calculează diferența dintre tablouri
  • array_diff_assoc() - Computes the difference of arrays with additional index check
  • 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() - Computes the intersection of arrays
  • array_intersect_assoc() - Computes the intersection of arrays with additional index check
  • 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

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User Contributed Notes 2 notes

up
1
countzero1981 at gmail dot com
1 year ago
What is the difference between array_udiff_assoc and array_diff_uassoc?
up
0
tmquang6805 at yahoo dot com
5 months ago
Difference between array_udiff_assoc() and array_diff_assoc()

- array_udiff_assoc(): Compares the DATA with the user supplied callback function
- array_diff_assoc(): Compares the INDEX with the user supplied callback function
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