Check for Spam in Contact form

[billcreswell]

Possibly start with something like:
// check for spam
$_http = 0;
$_href = 0;
foreach ($_POST as $key => $value){
$key = $value;
// Annoying URL spams in comments any field
$_http += substr_count($value, "http");
$_href += substr_count($value, "href");
}
if ($_http > 1 OR $_href > 1){
die("Sorry, contains too many links or banned words.");
}

[billcreswell]

There is another contact form plugin developed for Pluck CMS using captcha.
https://github.com/pluck-cms/pluck-cms-contactform_captcha

Concerns: captcha usability and accessbility.