在表单中捕获optgroup标签

Question

my HTML :

    <select name="field" required="true">
  <option value="">Choose ITEM</option>
    <optgroup label="ITEMGROUP 1">
      <option value="item1">item1</option>
      <option value="item2">item2</option>
      <option value="item3">item3</option>
      <option value="item4">item4</option>
      <option value="item5">item5</option>
      <option value="item6">item6</option>
      <option value="item7">item7</option>
    </optgroup>
   </select>

Now I want to grab the value of selected item :

$item = $_POST['field'];

What can I do if I want to grab the optgroup label ? Thanks !

Answer 1

optgroups are only used for client side presentation.

However, if you have a LOGIC to generate the groups, you should also be able to turn the Value into the appropriate group again, using the very same logic, but reversed.

edit: you could also pass the group as a prefix of the value.

something like

     <select name="field" required="true">
  <option value="">Choose ITEM</option>
    <optgroup label="ITEMGROUP 1">
      <option value="ITEMGROUP 1;item1">item1</option>
      <option value="ITEMGROUP 1;item2">item2</option>
      <option value="ITEMGROUP 1;item3">item3</option>
      <option value="ITEMGROUP 1;item4">item4</option>
      <option value="ITEMGROUP 1;item5">item5</option>
      <option value="ITEMGROUP 1;item6">item6</option>
      <option value="ITEMGROUP 1;item7">item7</option>
    </optgroup>
   </select>

and then use a simple explode() statement to get back the group information.