PHP -如何在数组中搜索相同的值对

function searchDuplicatePairs($array) {
    $result = array();
    $count = count($array);
    
    for ($i = 0; $i < $count; $i++) {
        for ($j = $i + 1; $j < $count; $j++) {
            if ($array[$i] == $array[$j]) {
                $result[] = array($array[$i], $array[$j]);
            }
        }
    }
    
    return $result;
}

$array = array(1, 2, 3, 4, 2, 3, 5);
$duplicatePairs = searchDuplicatePairs($array);

print_r($duplicatePairs);

Array
(
    [0] => Array
        (
            [0] => 2
            [1] => 2
        )

    [1] => Array
        (
            [0] => 3
            [1] => 3
        )
)

function searchDuplicatePairs($array) {
    $result = array();
    $countValues = array_count_values($array);
    
    foreach ($countValues as $value => $count) {
        if ($count > 1) {
            $result[] = array($value, $value);
        }
    }
    
    return $result;
}

$array = array(1, 2, 3, 4, 2, 3, 5);
$duplicatePairs = searchDuplicatePairs($array);

print_r($duplicatePairs);

Array
(
    [0] => Array
        (
            [0] => 2
            [1] => 2
        )

    [1] => Array
        (
            [0] => 3
            [1] => 3
        )
)