Notes

<?php
if(!isset($_POST['submit']))
{
//This page should not be accessed directly. Need to submit the form.
echo "error; you need to submit the form!";
}
$name = $_POST['name'];
$visitor_email = $_POST['email'];
$message = $_POST['message'];

//Validate first
if(empty($name)||empty($visitor_email))
{
echo "Name and email are mandatory!";
exit;
}

if(IsInjected($visitor_email))
{
echo "Bad email value!";
exit;
}

$email_from = '[email protected]';//<== update the email address
$email_subject = "New Form submission";
$email_body = "You have received a new message from the user $name.n".
"Here is the message:n $message".

$to = "[email protected]";//<== update the email address
$headers = "From: $email_from rn";
$headers .= "Reply-To: $visitor_email rn";
//Send the email!
mail($to,$email_subject,$email_body,$headers);
//done. redirect to thank-you page.
header('Location: thank-you.html');


// Function to validate against any email injection attempts
function IsInjected($str)
{
$injections = array('(n+)',
'(r+)',
'(t+)',
'(%0A+)',
'(%0D+)',
'(%08+)',
'(%09+)'
);
$inject = join('|', $injections);
$inject = "/$inject/i";
if(preg_match($inject,$str))
{
return true;
}
else
{
return false;
}
}

?>