Hello,

I am looking for some help with a newsletter form on my website (code below). I want to add regular expressions to the form below to validate the email address and keep spammers out. Is this possible? Can someone help me with the correct code? Any help or suggestions would be appreciated.

Thanks,

kaiman

<?php

if ($_POST[recipient] && $_POST[subject] && $_POST[redirect]) {

if ($_POST[required]) {
$rfields = explode (",",$_POST[required]);
foreach ($rfields as $check) {
if (!$_POST[$check]) {
header("Location: ".$_POST[errorpage]);
exit();
}
}
}

if ($_POST[autoresponse] && $_POST[email]) {
$html = file_get_contents($_POST[autoresponse]) or die("<b><font>Not a valid autoresponse page...</font><b>");
if ($html) {
$tit_start = strpos($html,"<title>")+7;
$tit_end = strpos($html,"</title>")-$tit_start;
$mailsubject = $html;
$mailsubject = substr($mailsubject, $tit_start, $tit_end);
mail($_POST[email], $mailsubject, $html, "From: $_POST[autoresponsefrom]<_POST>\r\n"."MIME-Version: 1.0\n"."Content-type: text/html; charset=iso-8859-1");
}
}
else if (!$_POST[email]) {
echo "<b><font>Email field required when using autoresponse mail...</font></b>";
exit();
}

$ndata = array("recipient","subject","required","errorpage","redirect","autoresponse","autoresponsefrom");

while (current($_REQUEST)) {
if (!in_array(key($_REQUEST),$ndata)) $msg .= key($_REQUEST).": ".current($_REQUEST)."\n";
next($_REQUEST);
}

mail($_POST[recipient],$_POST[subject],$msg,"From: $_POST[email]\r\n"."Reply-To: $_POST[email]\r\n");
header("Location: ".$_POST[redirect]);
}
else echo "<b><font>Recipient, subject or redirect field is missing...</font></b>";

?>

I found this one on zend forum:
[code]
function ValidateMail($Email) {
global $HTTP_HOST;
$result = array();
if (!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $Email)) {
$result[0]=false;
$result[1]="$Email is not properly formatted";
return $result;
}
list ( $Username, $Domain ) = split ("@",$Email);
if (getmxrr($Domain, $MXHost)){
$ConnectAddress = $MXHost[0];
} else {
$ConnectAddress = $Domain;
}
$Connect = fsockopen ( $ConnectAddress, 25 );
if ($Connect) {
if (ereg("^220", $Out = fgets($Connect, 1024))) {
fputs ($Connect, "HELO $HTTP_HOST\r\n");
$Out = fgets ( $Connect, 1024 );
fputs ($Connect, "MAIL FROM: <{$Email}>\r\n");
$From = fgets ( $Connect, 1024 );
fputs ($Connect, "RCPT TO: <{$Email}>\r\n");
$To = fgets ($Connect, 1024);
fputs ($Connect, "QUIT\r\n");
fclose($Connect);
if (!ereg ("^250", $From) || !ereg ( "^250", $To )) {
$result[0]=false;
$result[1]="Server rejected address";
return $result;
}
} else {
$result[0] = false;
$result[1] = "No response from server";
return $result;
}
} else {
$result[0]=false;
$result[1]="Can not connect E-Mail server.";
return $result;
}
$result[0]=true;
$result[1]="$Email appears to be valid.";
return $result;
}
[/code]

I'm using this:

		if($_POST['email']=="") {
		         $error = "no email error message.";
		} else if(!eregi("^[A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6}$",$_POST['email'])) {
			$error = "wrong email error message.";
			}

But, this doesn't block spammers, you may want to try captcha or something like.

You may wanna have a look at Forms To Go from Bebosoft. This does most of the hard work for you.

P.S. Not affiliated with them in any way!