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@desbest
Last active October 14, 2017 14:53
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Stop Forum Spam (block abusive ip addresses and emails from signing up)
<?php
function get_web_page($url, $cookiesIn = '')
{
$options = array(
CURLOPT_RETURNTRANSFER => true, // return web page
CURLOPT_HEADER => true, //return headers in addition to content
CURLOPT_FOLLOWLOCATION => true, // follow redirects
CURLOPT_ENCODING => "", // handle all encodings
CURLOPT_AUTOREFERER => true, // set referer on redirect
CURLOPT_CONNECTTIMEOUT => 120, // timeout on connect
CURLOPT_TIMEOUT => 120, // timeout on response
CURLOPT_MAXREDIRS => 10, // stop after 10 redirects
CURLINFO_HEADER_OUT => true,
CURLOPT_SSL_VERIFYPEER => false, // Disabled SSL Cert checks
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_COOKIE => $cookiesIn
);
$ch = curl_init($url);
curl_setopt_array($ch, $options);
$rough_content = curl_exec($ch);
$err = curl_errno($ch);
$errmsg = curl_error($ch);
$header = curl_getinfo($ch);
curl_close($ch);
$header_content = substr($rough_content, 0, $header['header_size']);
$body_content = trim(str_replace($header_content, '', $rough_content));
$pattern = "#Set-Cookie:\\s+(?<cookie>[^=]+=[^;]+)#m";
preg_match_all($pattern, $header_content, $matches);
$cookiesOut = implode("; ", $matches['cookie']);
$header['errno'] = $err;
$header['errmsg'] = $errmsg;
$header['headers'] = $header_content;
$header['content'] = $body_content;
$header['cookies'] = $cookiesOut;
return $header;
}
// stopforumspam.com API
function sfs_ip($ip)
{
//$response = file_get_contents('http://www.stopforumspam.com/api?ip='.$ip); //curl is installed
$response = get_web_page('http://www.stopforumspam.com/api?ip=' . $ip); //curl is not installed
$response = $response['content'];
$pattern = '/<appears>yes<\/appears>/';
if (preg_match($pattern, $response)) {
return true;
//require_once( './stopspammer.html' );
//exit();
} else {
return false;
}
}
function sfs_email($email)
{
//$response = file_get_contents('http://www.stopforumspam.com/api?email='.$email); //curl is installed
$response = get_web_page('http://www.stopforumspam.com/api?email=' . $_POST['email']); //curl is not installed
$response = $response['content'];
$pattern = '/<appears>yes<\/appears>/';
if (preg_match($pattern, $response)) {
return true;
//require_once( './stopspammer.html' );
//exit();
} else {
return false;
}
}
// ini_set('allow_url_fopen',1); //fix file_get_contents(): http:// wrapper is disabled in the server configuration by allow_url_fopen=0 error
$spammer1 = sfs_ip($_SERVER['REMOTE_ADDR']); //check if ip address is a spammer
$spammer2 = sfs_email($_POST['email']); // check if email address is a spammer
//$response = get_web_page('http://www.stopforumspam.com/api?email='.$_POST['email']); $response = $response['content'];
//$response2 = get_web_page('http://www.stopforumspam.com/api?ip='.$_SERVER['REMOTE_ADDR']); $response2 = $response2['content'];
//echo "$response // $response2";
if ($spammer1 === true || $spammer2 === true) {
$notice = "You cannot signup because you're on a spammer blacklist. To get removed, go to <a href=\"http://stopforumspam.com/remove\">http://stopforumspam.com/remove</a>";
//make the above variable a flash variable
header("Location: $_SERVER[HTTP_REFERER] "); //redirect to referrer
}
?>
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