層疊選單的動態生成_PHP教程

  if (isset($hierarchy)){
      //$hierarchy[] = $selection;
      if (isset($hierarchy)){
           echo "";
          echo $level, ': ', $sel, "
        }
    }
  }
  else{
  hierarchy[", $nextlevel, "]> n";
  for ($I = 1; $I     echo "$In";
  }
  echo "n";
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