Checking if php variable is a number or not
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/8409913/whats-the-correct-way-to-test-if-a-variable-is-a-number-in-php">What&#39;s the correct way to test if a variable is a number in PHP?</a>  </p>
</blockquote>



<p>I have two variables coming in from a form:</p>

<pre><code>$minNo = mysql_real_escape_string($_GET["minNo"]);
$maxNo = mysql_real_escape_string($_GET["maxNo"]);
</code></pre>

<p>How can I check whether they are numerical values or not?</p>
