QROkes

# Check for valid IPv4 and IPv6 values, including CIDR.
if [[ -n $ip && $ip =~ ^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\/([0-9]|[1-2][0-9]|3[0-2]))?$ || $ip =~ ^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))(\/([0-9]|[1-9][0-9]|1[0-2][0-8]))?$ ]]; then
	echo "Valid IP!"
else
	echo "[ERROR] 

QROkes

# Only numerals 0-9, basic Latin letters, both lowercase and uppercase, hyphen.
[[ $domain =~ ^[\.0-9A-Za-z\-]+$ ]] || domfail="true"
	
# Check Lenght
[[ ${#domain} -gt 67 ]] && domfail="true"
	
# Can not start or end with a hyphen
[[ $(echo "${domain}" | cut -c-1) == "-" || $(echo "${domain}" | rev | cut -c-1) == "-" ]] && domfail="true"

# Can not contain two points together and can not start or end with a point

QROkes

# Check if domain is subdomain
if [[ -n $domain ]]; then
	count=1
	while true; do
		tld=$(echo "${domain}" | rev | cut -d'.' -f -$count -s | rev)
		if ! grep -Fxq "$tld" /opt/webinoly/lib/public_suffix_list.dat; then
			break
		fi
		count=$[$count+1]
	done

QROkes

<?php
/*
	File: qa-plugin/webinoly-custom/qa-plugin.php
	Description: Anti SPAM Registration Plugin for Question2Answer
	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of