Print out all combination of a set of numbers in PHP

Question

I am new to PHP and I need your help. :)

Here is the scenario: I need "6" random numbers from the range "1 to 50" which when add up should give a total of "111". How do I print out all possible combinations?

function mynumbers($min, $max, $quantity) {
    $numbers = range($min, $max);
    shuffle($numbers);
    return array_slice($numbers, 0, $quantity);
}

$nums = mynumbers(1,50,6);
$sum = array_sum($nums);

if($sum == 111){
    sort($nums);
    foreach($nums as $n){
        echo $n .' '; 
    }
}

Thanks