Validating Checkbox

[seotheo]

Hi,

I am trying to add a checkbox to a form on a friends site and I need to make the form validate the checkbox before processing but I cant seem to get my head round it.

Heres the code so far.

<h1>Contact</h1>

            <p>Please fill in the following fields and we'll get back to you as soon as possible.</p>

            <form method="post" action="sendEmail.php">
                <div id="main">
                    <p><label for="name">Name:*</label> <input type="text" name="name" id="name" tabindex="1" /></p>
                    <p><label for="email">Email:*</label> <input type="text" name="email" id="email" tabindex="2" /></p>
                    <p><label for="comments">Comments:*</label> <textarea name="comments" id="comments" cols="12" rows="12" tabindex="3"></textarea></p>

<p>Want our free brochure? <input type="checkbox" name="checkbox" id="checkbox" /></p>

                    <p><input type="submit" name="submit" id="submit" value="Email Us!" tabindex="4" />
                    <p>* - required</p>
                    <ul id="response"><li></li></ul>
                </div><!--end main -->
            </form>

Heres the PHP:

<?php

    $name = trim($_POST['name']);
    $email = $_POST['email'];
    $comments = $_POST['comments'];
    $site_owners_email = '###########'; // Replace this with your own email address
    $site_owners_name = 'sales'; // replace with your name
    if (strlen($name) < 2) {
        $error['name'] = "Please enter your name";  
    }
    if (!preg_match('/^[a-z0-9&\'\.\-_\+]+@[a-z0-9\-]+\.([a-z0-9\-]+\.)*+[a-z]{2}/is', $email)) {
        $error['email'] = "Please enter a valid email address"; 
    }
    if (strlen($comments) < 3) {
        $error['comments'] = "Please leave a comment.";
    }
    if (!$error) {
        require_once('phpMailer/class.phpmailer.php');
        $mail = new PHPMailer();
        $mail->From = $email;
        $mail->FromName = $name;
        $mail->Subject = "Website Contact Form";
        $mail->AddAddress($site_owners_email, $site_owners_name);
        $mail->Body = $comments;
        // If you want to use receive your email at Gmail then uncomment the below lines and enter your gmail address and password.
        $mail->Mailer = "smtp";
        $mail->Host = "###########"; 
        $mail->SMTPAuth = true; // turn on SMTP authentication
        $mail->Username = "##########"; // SMTP username
        $mail->Password = "########"; // SMTP password
//      $mail->Send();
//      echo "<li class='success'>Thanks " . $name . ". We've received your email. We'll be in touch as soon as we possibly can! </li>";
        if ($mail->Send())





        {
            echo'<script>window.location.href="http://###"; </script>';
        }
    } # end if no error
    else {
        $response = (isset($error['name'])) ? "<li>" . $error['name'] . "</li> \n" : null;
        $response .= (isset($error['email'])) ? "<li>" . $error['email'] . "</li> \n" : null;
        $response .= (isset($error['comments'])) ? "<li>" . $error['comments'] . "</li>" : null;
        echo $response;
    } # end if there was an error sending

?>

The form validates the other fields fine but I need it to also check to see if the checkbox is selected before it sends the information.

Thanks Theo

[diafol]

Don't use preg_match() for email, use filter_var(). OK...

$name = trim($_POST['name']);
$email = $_POST['email'];
$comments = $_POST['comments'];
$checkbox = isset($_POST['checkbox']);

The $checkbox now stores boolean (true/false). $_POST['checkbox'] does not exist if checkbox unchecked.

[seotheo]

Hi, I have added the new line into my php but it still allows the form to be processed without the checkbox being selected.

i need it to give an error telling the user that they have to check the box in order to proceed.

Theo

[diafol]

Ah sorry misread. You just use js to enable and disable the submit button. However do you want to force somebody to sign up to a brochure? Seems a bit extreme to me. If I was confronted with this sort of choice, I would refuse to sign up out of principle. Just a thought

[diafol]

With jQuery, you could do this:

$('#checkbox').click(function()
{
    $('#submit').attr('disabled', !$(this).prop( "checked" ));
});

But make the submit button disabled to begin with:

<input type="submit" name="submit" id="submit" disabled value="Email Us!" tabindex="4" />

But, as I said, this is a bit yuck. Forcing your brochure on somebody just for giving you some feedback.