When to use ===, !== over ==, != in PHP
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/589549/php-vs-operator">php == vs === operator</a>  </p>
</blockquote>



<p>I understand the difference between <code>===</code>, <code>!==</code> vs. <code>==</code>, <code>!=</code> in PHP but I always find myself favouring <code>===</code> and <code>!==</code> but I have no real reason why.  In the documentation on PHP.net, there are often 'warnings' saying that you should use <code>===</code> to check the return value for some built-in functions.  So my question is why should I use the one set of operators over another?</p>

<p>Many thanks :).</p>
