При клике на сабмит выводится ошибка

<div class="adding_selection">
  <div class="row">
    <br/>
    <form name="all_table" action ="" method ="post">
      <input type="submit" name = "addNewDoc" value = "Добавить документ" /><br/><br/>
    <select name="option" >
      <option value="date">Дата</option>
      <option value="fromfield">От</option>
      <option value="author">Автор</option>
    </select> <br/>
    <input type="text" name = "text_field" /><br/>
    <input type="submit" name="sort" value="Отсортировать"/>
    </form>
    <br/>
  <?php
  $editingTable = false;
  $selection;
  if (isset($_POST['addNewDoc']))
  {
    $editingTable = true;
  }
if(!$editingTable)
{
//
}
else { ?>
<form name="editingTable" action="" method="post">
<img src=<?echo "modules/mod_adding_selection/images/".$params->get('IMAGE')?>><br/>
  <label><?echo $params->get('HEADERS');?></label>
    <input type="text" name = "date" value="Дата" />
      <input type="text" name = "textfield" value="" /><br/>
    <input type="text" name = "fromfield" value="От" /><br/>
      <textarea name="content"></textarea><br/>
        <input type="text" name = "author" value="Автор" /><br/>
  <input type="text" name = "sign" value="Подпись" /><br/>
  <input type="submit" name = "addNewDoc2" value="Добавить документ" /><br/>
</form>
<?php }
if(isset($_POST['addNewDoc2']))
{
  ModAddingSelectionHelper::Insert($params);
  $editingTable = false;
}
?>