(PHP 5 >= 5.1.0, PHP 7)
array_intersect_ukey — Computes the intersection of arrays using a callback function on the keys for comparison
$array1
, array $array2
[, array $...
], callable $key_compare_func
)
array_intersect_ukey() returns an array
containing all the values of array1
which have matching keys that are present in all the arguments.
array1
Initial array for comparison of the arrays.
array2
First array to compare keys against.
...
Variable list of array arguments to compare keys against.
key_compare_func
이 비교 함수는 첫번째 인수가 두번째 인수보다 작거나, 같거나, 클 경우에 각각 0보다 작거나, 같거나, 큰 정수를 반환해야 합니다.
Returns the values of array1
whose keys exist
in all the arguments.
Example #1 array_intersect_ukey() example
<?php
function key_compare_func($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);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
var_dump(array_intersect_ukey($array1, $array2, 'key_compare_func'));
?>
위 예제의 출력:
array(2) { ["blue"]=> int(1) ["green"]=> int(3) }
In our example you see that only the keys 'blue'
and 'green' are present in both arrays and thus
returned. Also notice that the values for the keys
'blue' and 'green' differ between
the two arrays. A match still occurs because only the keys are checked.
The values returned are those of array1
.