getting rid of comment spam

[rotour]

If I want to make sure that the $message variable in my php contact form doesn't contain any links, how do i do this?

Basically, if $message contains any link at all, I want to redirect to some kind of error/spam message.

I'm guessing it would be something like:

if ($_POST['message'] ***contains http***){
print "<meta http-equiv=\"refresh\" content=\"0;URL=spam.html\">";
}

I just don't know how to do the "contains" bit.

Thanks!

[Stryker250]

ive come up with this script...its not the best but i was looking for a quick solution 🙂

this checks for images and links...plus you can always add on to it :p

<?
		$msg = $_POST['message'];

	$search = stristr($msg, '<?');
	$search2 = stristr($msg, '?>');
	$search3 = stristr($msg, '<img');
	$search4 = stristr($msg, '<a');
	$search5 = stristr($msg, '/>');
	$search6 = stristr($msg, 'href');
	$search7 = stristr($msg, 'src');
	$search8 = stristr($msg, 'http://');
	$search9 = stristr($msg, 'www');
	if($search || $search1 || $search2 || $search3 || $search4 || $search5 || $search6 || $search7 || $search8 || $search9){

	header('Location: anit_spam.php');
	}else{
       //OTHERWISE IF THERE ARE NO LINKS FOUND OR IMAGES IN
      //IN THIS CASE...YOU DO WHAT YOU NEED TO DO HERE ;)
}
?>

[rotour]

That worked great. Thanks so much! This will save me a good 50-60 spam comments a day, easily.

[Stryker250]

yeah i know...that is why i created it it. i just started a guestbook and as soon as it hit the search engines the spam came rolling in. so i decided to stop it before it gets saved in the db, emailed to me and displayed in the guestbook.

glad to have helped 😉

[bradgrafelman]

Depending upon what time of spam you're talking about, if it's just a bunch of bots hammering away at your form, you might want to consider implementing a CAPTCHA.