title: Create .vcf with PHP for Apple address book (how to build UUID)
body: <p>I'm going to build an online addressbook that synchronizes with the Mac OS X internal addressbook application. I use the famous Baikal (http://baikal.codr.fr/) Server to connect both applications (web app and mac os x app).</p>
  
  <p>Now i want to add contacts online (contact files are based on a sqlite database), but i don't know how to create an UUID for Apples .vcf cards. They look like this:</p>
  
  <pre><code>BEGIN:VCARD
  VERSION:3.0
  PRODID:-//Apple Inc.//Address Book 6.1.2//EN
  N:Test;Test;;;
  FN:Test Test
  REV:2012-07-09T20:19:39Z
  UID:036f8e50-4b4d-49e1-82fb-089181227b15
  END:VCARD
  </code></pre>
  
  <p>Does anyone know, how i can create an UUID for .vcf files? </p>