combinations at its finest

combinations.php

<?php

function limit ($n, $input) {
    if ($n > 0) {
        $tmp_set = array();
        $res = limit($n-1, $input);
        foreach ($res as $ce) {
            foreach ($input as $e) {
                array_push($tmp_set, $ce . $e);
            }
        }
        return $tmp_set;
    }
    else {
        return array('→ ');
    }
}

$input = array('0','1','2','3','4','5','6','7','8','9');
$input2 = limit(4, $input);

echo "The Epic List <br>";
foreach($input2 as $output) {
    print $output . "<br>";
}