Never saw this operator before : <p>I was reading a source from laravel project and then i found this line:</p>

<pre><code>$this-&gt;crawler() ?: $this-&gt;response-&gt;getContent()
</code></pre>

<p>Does <code>?:</code> do something special? In php?</p>

<p>I dont remember seeing that in any other place</p>
