PHP operator difference && and "and"
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/2803321/and-vs-as-operator">&#39;AND&#39; vs &#39;&amp;&amp;&#39; as operator</a>  </p>
</blockquote>



<p>Sorry for very basic question but I started learning PHP just a week ago &amp; couldn't find an answer to this question on google/stackoverflow.</p>

<p>I went through below program:</p>

<pre><code>$one = true;
$two = null;
$a = isset($one) &amp;&amp; isset($two);
$b = isset($one) and isset($two);

echo $a.'&lt;br&gt;';
echo $b;
</code></pre>

<p>Its output is:</p>

<pre><code>false
true
</code></pre>

<p>I read &amp;&amp;/and are same. How is the result different for both of them? Can someone tell the real reason please?</p>
