title: Date('now') in PHP
body: <p>After a long time I needed to use date function of PHP. I wrote something like:</p>
  
  <pre><code>echo date('now');
  </code></pre>
  
  <p>and I got the output below:</p>
  
  <pre><code>1220123
  </code></pre>
  
  <p>What does that mean ?</p>