PHP form help.

Hi guys,

I’ve created a simple php form and am trying to get it to return empty fields to me for the email here’s what ive got.

<?php
if(isset($_POST))

{

    $name = check_input($_POST['form2mail_name']);
    $email = check_input($_POST['form2mail_email'], "Enter an email address please");
    $telp = check_input($_POST['form2mail_tel']);
    $address = check_input($_POST['texform2mail_address']);
    $nature = check_input($_POST['form2mail_nature_of_interest']);
    $thickness = check_input($_POST['form2mail_thickness']);
    $projectName = check_input($_POST['form2mail_project_name']);
	$sample = check_input($_POST['form2mail_samples']);

    //process sent message
    $to = '[email protected]';
    $subject = 'Reqeust Info parapan.co.uk';
    $message = "Name : " . $name ."\n" ;
    $message .= "Address : " . $address ."\n" ;
    $message .= "Nature : " . $nature ."\n" ;
    $message .= "Thickness : " . $thickness ."\n" ;
    $message .= "Project Name : " . $projectName ."\n" ;
    $message .= "Sample : " . $sample ."\n" ;
    $header = "Form : " . $email; 

    $sentmail = mail($to, $subject, $message, $header);
if($sentmail) {
header('Location: https://79.170.44.86/parapan.co.uk/colours/index.html');

}

}

?>
<? php
function check_input($data, $problem='')
{
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    if ($problem && strlen($data) == 0)
    {
        die($problem);
    }
    return $data;
}
?>