title: Cycle through $_POST variables and modify undefined with PHP
body: <p>I want to look through my PHP $_POST variables and change anything that is <code>"undefined"</code> (because of how jQuery is sending it) to <code>""</code> or at least <code>" "</code> so that when the email form is submitted it doesn't say <code>"undefined"</code> wherever the value wasn't filled out (optional fields).</p>
  
  <p>Thanks!</p>