Hello all,
I have a contact form on my website and I keep getting blank submissions from it which I suspect are SPAM.
Here is the php code I use to stop SPAM, can anyone see where it is going wrong or suggest what can be added to stop these blank submissions.
<?php
$to = "info@mydomain.co.uk";
$subject = "Customer Contact Phone";
$body = $POST["realname"];
$body .= "\n";
$body .= $POST["number"];
$email = "info@mydomain.co.uk";
function is_valid_email($to) {
return preg_match('#[a-z0-9.!#$%&\'*+-/=?_`{|}~]+@([0-9.]+|([\s]+.+[a-z]{2,6}))$#si', $to);
}
function contains_bad_str($str_to_test) {
$bad_strings = array(
"content-type:"
,"mime-version:"
,"multipart/mixed"
,"Content-Transfer-Encoding:"
,"bcc:"
,"cc:"
,"to:"
);
foreach($bad_strings as $bad_string) {
if(eregi($bad_string, strtolower($str_to_test))) {
echo "$bad_string found. Suspected injection attempt - mail not being sent.";
exit;
}
}
}
function contains_newlines($str_to_test) {
if(preg_match("/(%0A|%0D|\n+|\r+)/i", $str_to_test) != 0) {
echo "newline found in $str_to_test. Suspected injection attempt - mail not being sent.";
exit;
}
}
if (!is_valid_email($to)) {
echo 'Invalid email submitted - mail not being sent.';
exit;
}
contains_bad_str($email);
contains_bad_str($subject);
contains_bad_str($body);
contains_bad_str($to);
contains_newlines($email);
contains_newlines($subject);
contains_newlines($to);
$headers = "From: $email";
mail($to, $subject, $body, $headers);
echo "";
die();
?>
Thanks in advance for any help with this!
Kind regards, Mike
