<?
/* Pass variable as hidden
 
Pass variable as hidden field
recursively handles array
eg usage: */
 
foreach ($_REQUEST as $key => $val) 
pass_hidden($key, $val);
 function pass_hidden($key, $val) {
  if (is_array($val)) {
    foreach ($val as $k => $v) 
      pass_hidden("{$key}[{$k}]", $v);
  } else {
    ?><input type="hidden" name="<?=$key?>" value="<?=htmlspecialchars($val)?>">
    <?
  }
}
?>