title: How to POST empty <select .. multiple> HTML elements if empty?
body: <p>I have the following multi-select box in a HTML form, where user can select one or more option.</p>
  
  <pre><code>&lt;select id="eng_0" name="eng_0[]" multiple size="3"&gt;
    &lt;option value="Privilégier"&gt;Privilégier&lt;/option&gt;
    &lt;option value="Accepté"&gt;Accepté&lt;/option&gt;
    &lt;option value="Temporaire"&gt;Temporaire&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>When the user selects no option, the form is POSTed to a PHP backend but it creates no empty array value for $_POST['eng_0'] as if the field was not even on the form.</p>
  
  <p>This is kind of like the unchecked checkbox that is not submitted problem.</p>
  
  <p>Is there any way to have it POST the select object even if there is no selected option? It can be in jQuery if that helps.</p>