get unique pairs which have sum of targeted values

index.php

<?php

class UniquePairs {
    public function getdata($elements, $target) {
        $i = 0;
        $response = [];
        foreach($elements as $element1) {
            $j = 0;
            foreach($elements as $element2) {
                $result = [];
                if($j > $i) {
                    if(($element1 + $element2) == $target) {
                        $result[] = $element1;
                        $result[] = $element2;
                    }
                }
                if(!empty($result)) {
                    $response[] = $result;
                }
                $j++;
            }
            $i++;
        }
        $uniqueArray = [];
        foreach ($response as $subArray) {
            $reversedSubArray = array_reverse($subArray);
            if (!in_array($subArray, $uniqueArray) && !in_array($reversedSubArray, $uniqueArray)) {
                $uniqueArray[] = $subArray;
            }
        }
        echo "Total Pairs: ". count($uniqueArray);
        echo "<pre>Pairs: <br>";
        print_r($uniqueArray); exit();
    }
}

$data = new UniquePairs();
$data->getData([1, 2, 5, 46, 1, 6, 9], 47);

?>