title: PHP double arrow notation for instances of an class(es)
body: <p>I would be grateful if someone explained to me the use of double arrow notation in PHP. I suggest is a double classes and instantiation of that classes, but I am not sure. Some examples will be good. Thanks.</p>
  
  <p>Something like this:</p>
  
  <pre><code>$obj-&gt;prop-&gt;methd();
  </code></pre>