title: PHP: version_compare() returns -1 when comparing 5.2 and 5.2.0?
body: <pre><code>version_compare('5.2', '5.2.0'); // returns -1, as if the second parameter is greater!
  </code></pre>
  
  <p>Isn't 5.2 and 5.2.0 suppose to be equal? (isn't 5.2 and 5.2.0.0 are also equal)?</p>