I can't work out how to add Google reCAPTCHA to this contact form. I have no problems adding on the front end but can't seem to apply to the server side.
<!-- Form --> <div id="contact-form"> <form method="post" action="contact.php"> <div class="field"> <label>Name:</label> <input type="text" name="name" class="text" /> </div> <div class="field"> <label>Email: <span>*</span></label> <input type="text" name="email" class="text" /> </div> <div class="field"> <label>Message: <span>*</span></label> <textarea name="message" class="text textarea" ></textarea> </div> <div class="field"> <input type="button" class="button light medium" id="send" value="Send Message"/> </div> <div class="field"> <input type="button" class="button gray medium" value="Reset!"/> </div> <div class="loading"></div> </form> </div> PHP Server Side
<?php //Retrieve form data. //GET - user submitted data using AJAX //POST - in case user does not support javascript, we'll use POST instead $name = ($_GET['name']) ? $_GET['name'] : $_POST['name']; $email = ($_GET['email']) ?$_GET['email'] : $_POST['email']; $message = ($_GET['message']) ?$_GET['message'] : $_POST['message']; //flag to indicate which method it uses. If POST set it to 1 if ($_POST) $post=1; //Simple server side validation for POST data, of course, you should validate the email if (!$name) $errors[count($errors)] = 'Please enter your name.'; if (!$email) $errors[count($errors)] = 'Please enter your email.'; if (!$message) $errors[count($errors)] = 'Please enter your message.'; //If the errors array is empty, send the mail if (!$errors) { // ====== Your mail here ====== // $to = '[email protected] <[email protected]>'; // Sender $from = $name . ' <' . $email . '>'; //subject and the html message $subject = 'Contact Message from the Byblos Group Website'; $message = ' <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head></head> <body> <table> <tr><td>Name:</td><td>' . $name . '</td></tr> <tr><td>Email:</td><td>' . $email . '</td></tr> <tr><td>Message:</td><td>' . nl2br($message) . '</td></tr> </table> </body> </html>'; // Send the mail $result = sendmail($to, $subject, $message, $from); //if POST was used, display the message straight away if ($_POST) { if ($result) echo 'Thank you! We have received your message.'; else echo 'Sorry, unexpected error. Please try again later'; //else if GET was used, return the boolean value so that //ajax script can react accordingly //1 means success, 0 means failed } else { echo $result; } // If the errors array has values } else {} // Simple mail function with HTML header function sendmail($to, $subject, $message, $from) { $headers = "MIME-Version: 1.0" . "\r\n"; $headers .= "Content-type:text/html;charset=iso-8859-1" . "\r\n"; $headers .= 'From: ' . $from . "\r\n"; $result = mail($to,$subject,$message,$headers); if ($result) return 1; else return 0; } ?> 
