title: php interactive shell doesn't have any output?
body: <p>bash-3.2$ php -a
  Interactive shell</p>
  
  <pre><code>php &gt; $a = null || "hi"
  php &gt; echo $a
  php &gt; $b = "hi"
  php &gt; echo $b
  </code></pre>
  
  <p>As you can see here, nothing is being echoed.<br>
  Why is that?
  I'm using Mac OS X lion. =\
  (fresh install)</p>