Looping through array of different lengths in PHP -

i have order form inputs this:

<input type="text" name="booking[sandwich][roastbeef][qty]"  /> <input type="text" name="booking[sandwich][cheese][qty]"  /> <input type="text" name="booking[pizza][classic][qty]"  /> <input type="text" name="booking[pizza][special][qty]"  /> <input type="text" name="booking[coffee][qty]"  /> 

i'm having trouble looping through arrays correctly.

here kind of output have:

<h2>sandwich</h2> <p><strong>roastbeef:</strong> 10</p> <p><strong>cheese:</strong> 5</p>  <hr> <h2>coffee</h2> <p><strong>quantity:</strong> 15</p> 

if pizza input empty, heading "pizza" should not printed! same "coffee" or "sandwich" group. if order not contain in group, heading should not printed.

i can't write specific tests every input, have 200 of them.

here have tried do:

$booking = $_post['booking'];     //first check if there 1 or more input not empty if (!empty($booking)) {    foreach ($booking $type => $items) {     if (count(array_filter($items))) {         $order .= "<hr>\n<h2>" . ucfirst($type) . ":</h2>\n";     }     foreach ($items $name => $qty) {         if ($qty > "0"){             $order .= "<p><strong>" . ucfirst($name) . ":</strong> "  . $qty . "</p>\n";         }     }   } } 

this code works when array has length of 2 keys. can't seem wrap brain around how deal other lengths. great!

edit:

with answer @treegarden, have need. need have sort of check if "group" empty, <h2> should not printed. if (count(array_filter($entry))) works in not printing thing if group empty, input have 2 keys.

if (!empty($booking)) {      foreach($booking $key=>$entry) {         if (count(array_filter($entry))) {              echo "<h2>$key</h2>"; //should printed if 1 or more inputs in group not empty              foreach($entry $key=>$subentry) {                 if(is_array($subentry) && $subentry['qty'] > 0) {                     echo "<p><strong>$key:</strong>" . $subentry['qty'] . "</p>";                 } elseif(!is_array($subentry) && $subentry > 0) {                     echo "<p><strong>quantity:</strong>  $subentry</p>";                 }             }             echo '<hr/>';         }     }           }   

maybe try recursion, example snippet:

<?php class recursivearrayonlyiterator extends recursivearrayiterator {   public function haschildren() {     return is_array($this->current());   } } ?> 

else simple forward way assume have 3 or more nested loops, keep checking $value in $kv using is_array(), done invoking function.