PHP 7.4.0 alpha 3 Released

array_diff_ukey

(PHP 5 >= 5.1.0, PHP 7)

array_diff_ukeyComputes the difference of arrays using a callback function on the keys for comparison

설명

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.

인수

array1

The array to compare from

array2

An array to compare against

...

More arrays to compare against

key_compare_func

이 비교 함수는 첫번째 인수가 두번째 인수보다 작거나, 같거나, 클 경우에 각각 0보다 작거나, 같거나, 큰 정수를 반환해야 합니다.

int callback ( mixed $a, mixed $b )

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() - 데이터 비교 콜백함수를 사용하여 배열간의 차이를 계산
  • 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

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