title: Know if email was a reply using IMAP in PHP
body: <p>I am not sure if it is in the headers or not, but I am looking for a way to tell if an email I receive is a response to an email I sent, and if so, to only grab the new text, not "quoted text"</p>
  
  <p>A little background:  I am creating a script that will send out emails automatically.  I am creating a cron job to run at periodic intervals to check to see if there were any replies.  If there were replies, I only want to grab the new stuff, and not the old stuff.</p>
  
  <p>In the past, I would send out emails with the id in the subject (You have a new response [1234]), and would then check the subject for the stuff in between the [ and ].  Then I would grab all the message and store it since every web browser/email uses a different character or style for quoted-text.  Some do ">" some do a horizontal rule, some do absolutely nothing.</p>
  
  <p>Anyways, I am just looking for something in the email header that would indicate they are replying and what the new text might be.  If it's not possible, I will just keep on doing what I am doing.</p>