mirror of
https://gh.wpcy.net/https://github.com/webguyio/stop-spammers-classic.git
synced 2026-05-28 02:13:58 +08:00
43 lines
No EOL
1.3 KiB
PHP
43 lines
No EOL
1.3 KiB
PHP
<?php
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if ( !defined( 'ABSPATH' ) ) {
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status_header( 404 );
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exit;
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}
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class chkdnsbl {
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public function process( $ip, &$stats = array(), &$options = array(), &$post = array() ) {
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if ( strpos( $ip, '.' ) === false ) {
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return false;
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}
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$iplist = array(
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'sbl.spamhaus' => '.sbl.spamhaus.org',
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'xbl.spamhaus' => '.xbl.spamhaus.org'
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);
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foreach ( $iplist as $data ) {
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// only works for IPv4
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$lookup = implode( '.', array_reverse( explode( '.', $ip ) ) ) . $data;
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$result = explode( '.', gethostbyname( $lookup ) );
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$retip = $ip;
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if ( count( $result ) == 4 ) {
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$retip = $result[3] . '.' . $result[2] . '.' . $result[1] . '.' . $result[0];
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}
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if ( count( $result ) == 4 && $retip != $ip ) {
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if ( $result[0] == 127 ) {
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// query successful
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// 127 is a good lookup hit
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// [3] = type of threat - we are only interested in comment spam at this point - if user demand I will change
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// [2] is the threat level. 25 is recommended
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// [1] is numbr of days since last report
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// spammers are type 1 to 7
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if ( $result[2] >= 25 && ( $result[3] >= 1 && $result[3] <= 7 ) && $result[1] > 0 ) {
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return "DNSBL: $data=" . $result[0] . ',' . $result[1] . ',' . $result[2] . ',' . $result[3];
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}
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}
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}
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}
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return false;
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}
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}
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?>
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