title: Checking if php variable is a number or not
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://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>