title: difference between \r\n  and  \n\n in php email
body: <p>I'm setting up a php mail sending script...</p>
  
  <p>While adding different headers, I've come across the symbol for a new line in the email (since a &lt; br > tag won't do)...</p>
  
  <p>So my question is what is the difference between \r\n and \n\n ?</p>
  
  <p>for example:   </p>
  
  <pre><code>echo $var1 . " \r\n" . $var2 . "\n\n";
  </code></pre>
  
  <p>thanks for your help!</p>