Explain how this code works in PHP?
<p>Please see the below code this is work perfectly in PHP. Can anyone explain me how this code works. Because in the below code i have declared <code>$caregory_id</code> <code>without semicolon</code> and without any value deceleration. Then also this code work perfectly without any error and <code>var_dump($category_id)</code> returns me an <code>null</code> value.</p>

<p>How php execute this code without semicolon??</p>

<pre><code>&lt;?php
    $category_id= //No semicolon
    var_dump($category_id); //returns NULL
?&gt;
</code></pre>
