<?php
$n = 5;
$a=array();
$s=0;
for ($j = 0; $j < $n; $j++)
{ $a[$j] = rand(0,19);
  $b = $a[$j];
  while ($b > 0)
  { $s += $b%10;
    $b = ($b-$b%10)/10;
  }
}
print_r($a);
echo "Шукана сума цифр: $s";
?>