title: Zend Framework 1.x and 2.x, How Compatible Are They?
body: <p>I am interested in learning Zend Framework 2.x, and I've noted that there are many good books written about ZF 1.8, 1.9, etc... however, I haven't come across any that explicitly states it is for ZF2 (except for one, and it was written in German).</p>
  
  <p>In order to learn ZF, I could sit an learn it through the documentation... however, that sounds rather unsavory, despite the fact that it contains the latest information and arguably is the "best" source. I would like to endeavor in the more abundant sources on versions 1.8 or 1.9 as I learn this framework.</p>
  
  <p>How much overlap is there between 1.8/1.9 to 2.x? I know 2.x uses namespaces and many new PHP 5.3.x features, but are there really that many changes between the implementation of these versions that I would be wasting my time trying to learn anything less than 2.0?</p>
  
  <p>I'm aware that even if there is a large amount of compatibility, I would still have to come back and fill in a few "knowledge gaps". I'm just looking for a quick run down of the framework overall.</p>
  
  <p>Thank you for your time.</p>