counting array

can anyone please tell me what does this script do ??

	if($child['cat_id'] != $child['cat_parent']) {
	$count = count($child)-1;
		for ($i = 0; $i < $count; $i++) {
			if ($i == 0) {
			$ii[] = $i;
			}
		}
			
			$iii = count($ii);
			
			if ($count == $iii) {
		    $add = '&nbsp;&nbsp;';
			}			
			else {
			$add = '|';
			}
			}

PHP:

please?

 

if($child['cat_id'] != $child['cat_parent']) {
   $count = count($child)-1;
   for ($i = 0; $i < $count; $i++) {
      if ($i == 0) {
         $ii[] = $i;
      }
   }
   $iii = count($ii);
   if ($count == $iii) {
      $add = '&nbsp;&nbsp;';
   }         
   else {
      $add = '|';
   }
}

PHP:

Indented like this, it's a bit easier to read. But still, I have no idea what it's for

 

it is for counting the number of names echoed in <option> collected from mysql database's table.

i can understand the first part, but not rest of it.
i can see it is:
if $child['cat_id'] isnt $child['cat_parent'] (which means, if the current echoed name isnt a parent) then do the rest of code.. which is the part i cant understand.
so, can anyone help me ??