[edit] Last updated: Fri, 17 May 2013

array_diff_ukey

(PHP 5 >= 5.1.0)

array_diff_ukey — Computes the difference of arrays using a callback function on the keys for comparison

Descrierea

array array_diff_ukey ( array $array1 , array $array2 [, array $ ... ], callable $key_compare_func )

Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values.

Unlike array_diff_key() a user supplied callback function is used for the indices comparison, not internal function.

Parametri

array1: The array to compare from
array2: An array to compare against
...: More arrays to compare against
key_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

Returns an array containing all the entries from array1 that are not present in any of the other arrays.

Exemple

Example #1 array_diff_ukey() example


<?php
function key_compare_func($key1, $key2)
{
    if ($key1 == $key2)
        return 0;
    else if ($key1 > $key2)
        return 1;
    else
        return -1;
}

$array1 = array('blue'  => 1, 'red'  => 2, 'green'  => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan'   => 8);

var_dump(array_diff_ukey($array1, $array2, 'key_compare_func'));
?>

Exemplul de mai sus va afișa:

array(2) {
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}

Note

Notă:
This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff_ukey($array1[0], $array2[0], 'callback_func');.

Vedeți de asemenea

array_diff() - Calculează diferența dintre tablouri
array_udiff() - Computes the difference of arrays by using a callback function for data comparison
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_assoc() - Computes the difference of arrays with additional index check, compares data by a callback function
array_udiff_uassoc() - Computes the difference of arrays with additional index check, compares data and indexes by a callback function
array_diff_key() - Computes the difference of arrays using keys for comparison
array_intersect() - Computes the intersection of arrays
array_intersect_assoc() - Computes the intersection of arrays with additional index check
array_intersect_uassoc() - Computes the intersection of arrays with additional index check, compares indexes by a callback function
array_intersect_key() - Computes the intersection of arrays using keys for comparison
array_intersect_ukey() - Computes the intersection of arrays using a callback function on the keys for comparison

add a note User Contributed Notes array_diff_ukey - [1 notes]

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-2

jordancdarwin at googlemail dot com ¶

5 years ago


Note, also that when you are using a callback function you can use the text-placeholders as this function relies on the retval of the function you give.



So, instead of 1,0,-1 you can use TRUE and FALSE if using only two options.



Just thought it may help you

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