array_diff_uassoc
array_diff
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PHP Manual

# 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

### 설명

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.

### 인수

`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.

### 반환값

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

### 예제

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'));
?>`

위 예제의 출력:

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

### 주의

> Note: 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');.

### 참고

- array_diff() - 배열 차이를 계산
- array_udiff() - Computes the difference of arrays by using a callback function for data comparison
- array_diff_assoc() - 추가적인 인덱스 확인과 함께 배열 차이를 계산
- 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() - 배열의 교집합을 계산
- array_intersect_assoc() - 인덱스 검사과 함께 배열의 교집합을 계산
- 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

array_diff_uassoc
array_diff
배열 함수 목록
PHP Manual