| 
<?php 
session_start();
 
 if( isset($_POST['submit'])) {
 if( $_SESSION['security_code'] == $_POST['security_code'] && !empty($_SESSION['security_code'] ) ) {
 // If the answer is true. Insert you code for processing the form here, e.g emailing the submission, entering it into a database.
 echo 'Thank you. Your message said "'.$_POST['message'].'"';
 unset($_SESSION['security_code']);
 } else {
 // If the answer is false. Insert your code for showing an error message here.
 echo 'Ups, you have provided an invalid security code! Please ';
 ?>
 <a href="form_example.php">reload</a>
 <?PHP
 }
 } else {
 
 ?>
 
 <form action="form_example.php" method="post">
 <label for="name">Name: </label><input type="text" name="name" id="name" /><br />
 <label for="email">Email: </label><input type="text" name="email" id="email" /><br />
 <label for="message">Message: </label><textarea rows="5" cols="30" name="message" id="message"></textarea><br />
 <img src="MathchaSecurityImages.php?difficulty=1&theme=t0" /><br />
 <label for="security_code">Security Code: </label><input id="security_code" name="security_code" type="text" /><br />
 <input type="submit" name="submit" value="Submit" />
 </form>
 
 <?php
 }
 ?>
 |