Help with creating anti-spam on site

Question

I could do with a bit of help
I'm trying to create a honeypot anti-spam form for a friend's website, but I can't get it to work.
I've put in a regular and time honeypot
On the form page
<p class="end-para">Simply fill in the form below, including all the required details and a member of our friendly and experienced customer service team will be happy to call you back at your chosen time.</p>
<form method="post" action="callback.php">
<fieldset class="site-forms">
<p><label class="contact-fields" for="name">Your Name:</label>
<input type="text" class="login" name="name" id="name"/></p>
                    <li class="robotic" id="pot">
  <label for="robotest">If you're human leave this blank:</label>
  <input name="robotest" id="robotest" class="robotest" type="text" />
</li>
<p><label class="contact-fields" for="email">Email Address:</label>
<input type="text" class="login" name="email" id="email"/></p>
<p><label class="contact-fields" for="telephone">Telephone:</label>
<input type="text" class="login" name="telephone" id="telephone"/></p>
            <p> <input type="hidden" name="loadtime" value="time();" /></p>
        <p>
</fieldset>
<fieldset class="site-forms">
<p><label class="contact-fields" for="time">When do you want us to call?</label></p>
<input type="radio" name="best_time" value="Call me in the daytime (9am - 5pm)"> Call me in the daytime (9am - 5pm)<br>
<input type="radio" name="best_time" value="Call me in the evening (5pm - 9pm)" checked> Call me in the evening (5pm - 9pm)<br>
<input type="radio" name="best_time" value="Call anytime"> Call me anytime<br>
<input type="radio" name="best_time" value="I would prefer to be emailed"> I would prefer to be emailed<br>
<p class="form-notes"><small><strong>Note:</strong> We will endeavour to call you at the time you selected and within 1 business day.</small></p>
And on the next page
<?php
  $name = $_REQUEST['name'] ;
  $robotest = $_POST['robotest'];
  $email = $_REQUEST['email'] ;
  $telephone = $_REQUEST['telephone'] ;
  $loadtime = $_POST['loadtime'];
  $best_time = $_REQUEST['best_time'] ;
if($_POST){
  $robotest = $_POST['robotest'];
  if($robotest)
  $error = "Sayonara Mr Roboto.";
  else{
  $success = "Your message was sent!";
  if($success)
  echo '<div class="msg success">'.$success.'</div>';
  $loadtime = $_POST['loadtime'];
$totaltime = time() - $loadtime;
if($totaltime < 5)
   echo("You took less than 5 seconds to complete the form, blah blah blah");
   exit;
  if (!isset($_REQUEST['email'])) {
    header( "Location: http://www.windowfixuk.co.uk" );
  elseif (empty($email) || empty($telephone)) {
Can anyone suggest what is incorrect or ways to improve the set up?
Thanks

Answer 1

Dowifi wrote:
Not sure how to submit as a robot to be honest.
It just doesn't appear to be working though. Spam still gets through
Test by changing your 'hidden' form field to be viewable as a 'text' input field:
<input type="text" name="loadtime" value="time();" />
If you type something in the field and the information is sent to your email address then it's NOT working.
As mentioned in my previous post I would just be using the code below to check to see if the form field is empty or not:
if(!empty ($_POST['loadtime'])) {
exit;