rewrew

<?php
    $array = [2,3,4,5,3,7,2,2];
    $counted = [];
    
    foreach ($array as $k => $v) {
        if (!isset($counted[$v])) {
            $counted[$v] = 0;
        }
        
        $counted[$v]++;
    }
    
    foreach ($counted as $k => $v) {
        if ($v > 1) {
            for ($i = $v; $i > 0; $i--)  {
                echo $k;
            }
        }
    }
?>