blHdIjbJ

<?php
function rblcheck($host) { // Note: I have no idea how well suited CBL is for this purpose. If it gets annoying we can remove it ~ Aurora
        $rbls = array('sbl-xbl.spamhaus.org', 'rbl.efnet.org', 'cbl.abuseat.org', 'dnsbl.dronebl.org');
        foreach($rbls as $rbl) {
                $lookup = implode('.', array_reverse(explode('.', $host))) . '.' . $rbl;
                if (strstr(gethostbyname($lookup), "127.0.0")) {
                        return $rbl;
                } 
        }
        return 0;