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(PHP 5 >= 5.1.0, PHP 7, PHP 8)
array_intersect_ukey — Computes the intersection of arrays using a callback function on the keys for comparison
array_intersect_ukey() returns an array
containing all the values of array
which have matching keys that are present in all the arguments.
array
Initial array for comparison of the arrays.
arrays
Arrays to compare keys against.
key_compare_func
Порівняльна функція має повертати ціле число, котре менше, рівне або більше нуля, якщо перший параметр вважається відповідно меншим, рівним або більшим за другий.
Returns the values of array
whose keys exist
in all the arguments.
Приклад #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'));
?>
Поданий вище приклад виведе:
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 array
.