Ecco un breve tutorial su come creare un contact form con Bootstrap 3 e il recaptcha di google.

Sul blog di Jon Bake possiamo trovare un semplice tutorial su come creare un form di contatto con BootStrap 3 con il supporto del captcha di Google.

Le tecnologie usate in questo breve esempio sono HTML, jQuery, PHP e SecureImage.

Ecco come creare il form in HTML

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La porzione di JavaScript che si occuperà di chiamare lo script PHP e passargli i valori del form

$(document).ready(function() {
  $("#feedbackSubmit").click(function() {
    //clear any errors
    contactForm.clearErrors();
 
    //do a little client-side validation -- check that each field has a value and e-mail field is in proper format
    var hasErrors = false;
    $('#feedbackForm input,textarea').each(function() {
      if (!$(this).val()) {
        hasErrors = true;
        contactForm.addError($(this));
      }
    });
    var $email = $('#email');
    if (!contactForm.isValidEmail($email.val())) {
      hasErrors = true;
      contactForm.addError($email);
    }
 
    //if there are any errors return without sending e-mail
    if (hasErrors) {
      return false;
    }
 
    //send the feedback e-mail
    $.ajax({
      type: "POST",
      url: "library/sendmail.php",
      data: $("#feedbackForm").serialize(),
      success: function(data)
      {
        contactForm.addAjaxMessage(data.message, false);
        //get new Captcha on success
        $('#captcha').attr('src', 'library/vender/securimage/securimage_show.php?' + Math.random());
      },
      error: function(response)
      {
        contactForm.addAjaxMessage(response.responseJSON.message, true);
      }
   });
    return false;
  }); 
});
 
//namespace as not to pollute global namespace
var contactForm = {
  isValidEmail: function (email) {
    var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    return regex.test(email);
  },
  clearErrors: function () {
    $('#emailAlert').remove();
    $('#feedbackForm .help-block').hide();
    $('#feedbackForm .form-group').removeClass('has-error');
  },
  addError: function ($input) {
    $input.siblings('.help-block').show();
    $input.parent('.form-group').addClass('has-error');
  },
  addAjaxMessage: function(msg, isError) {
    $("#feedbackSubmit").after('
' + $('
').text(msg).html() + '
'); } };

Ecco come creare lo script in PHP

 $messsage)));
  }
 
  /**
   * Return a formatted message body of the form:
   * Name: 
   * Comment: 
   *
   * @param String $name     name of submitter
   * @param String $message message/comment submitted
   */
  function setMessageBody ($name, $message) {
    $message_body = "Name: " . $name."\n\n";
    $message_body .= "Comment:\n" . nl2br($message);
    return $message_body;
  }
 
  $email = $_POST['email']; 
  $message = $_POST['message'];
 
  header('Content-type: application/json');
  //do some simple validation. this should have been validated on the client-side also
  if (empty($email) || empty($message)) {
    errorResponse('Email or message is empty.');
  }
 
  //do Captcha check, make sure the submitter is not a robot:)...
  include_once './vender/securimage/securimage.php';
  $securimage = new Securimage();
  if (!$securimage->check($_POST['captcha_code'])) {
    errorResponse('Invalid Security Code');
  }
 
  //try to send the message
  if(mail(MY_EMAIL, "Feedback Form Results", setMessageBody($_POST["name"], $message), "From: $email")) {
    echo json_encode(array('message' => 'Your message was successfully submitted.'));
  } else {
    header('HTTP/1.1 500 Internal Server Error');
    echo json_encode(array('message' => 'Unexpected error while attempting to send e-mail.'));
  }
?>

Possiamo trovare il progetto intero su GitHub

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