Last updated: Fri, 20 Nov 2009

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 $ ... ], callback $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() an 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: callback function to use. The callback function 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.

Valorile întroarse

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 afişa:

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');.

Vedeţi de asemenea

array_diff() - Calculează diferenţa 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

jordancdarwin at googlemail dot com
15-Dec-2007 09:41


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

add a note

array_diff

array_diff_uassoc

Last updated: Fri, 20 Nov 2009