如何基于整数值将数组拆分为两个数组

Question

Here is an example array I want to split:

(1428,217,1428)

How do I split it in 2 array like this?

(1428,1428)
(217)

I have tried following way but it's only return 1428 array.

$counts = array_count_values($array);
$filtered = array_filter($array, function ($value) use ($counts) {
    return $counts[$value] > 1;

});

Answer 1

One way to solve this for your example data is to sort the array and use array_shift to get the first element of the array and store that in an array.

$a = [1428,217,1428];
sort($a);
$b = [array_shift($a)];

print_r($a);
print_r($b);

Result

Array
(
    [0] => 1428
    [1] => 1428
)
Array
(
    [0] => 217
)