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function encode_ip($dotquad_ip)
{
	if (substr_count($dotquad_ip,":") > 0 && substr_count($dotquad_ip,".") == 0){
		// ipv6 - "::1" => "0000000000000000000000000001"(hex)
		// unconpress - "::1" => "0:0:0:0:0:0:0:1"
		if(strstr($dotquad_ip,"::" )){
			$e = explode(":", $dotquad_ip);
			$s = 8-sizeof($e)+1;
			foreach($e as $key=>$val){
				if ($val == ""){
					for($i==0;$i<=$s;$i++)
						$newip[] = 0;
				} else {
					$newip[] = $val;
				}
			}
			$dotquad_ip = implode(":", $newip);
		}
		$ip_sep = explode(':', $dotquad_ip);
		return sprintf('%04x%04x%04x%04x%04x%04x%04x%04x', hexdec($ip_sep[0]), hexdec($ip_sep[1]), hexdec($ip_sep[2]), hexdec($ip_sep[3]),hexdec($ip_sep[4]), hexdec($ip_sep[5]), hexdec($ip_sep[6]), hexdec($ip_sep[7]));
	} else {
		// ipv4 - "127.0.0.1" => "7F000001"
		$ip_sep = explode('.', $dotquad_ip);
		return sprintf('%02x%02x%02x%02x', $ip_sep[0], $ip_sep[1], $ip_sep[2], $ip_sep[3]);
	}
}

function decode_ip($int_ip)
{
	if ( strlen($int_ip) == 32){
                // ipv6 - "..." => ""
		$hexipbang = chunk_split($int_ip, 4, ':');
/*		$hexipbang = explode(':', chunk_split($int_ip, 4, ':'));
		//compress
		if(!strstr($hexipbang,"::" )){
			$e = explode(":", $hexipbang);
		        $zeros = array(0);
			$result = array_intersect ($e, $zeros );
			if (sizeof($result) >= 6){
				if ($e[0]==0) {$newip[] = "";}
				foreach($e as $key=>$val){
					if ($val !=="0"){
						$newip[] = $val;
					}
				}
				$hexipbang = implode("::", $newip);
			}
		}else{
			$hexipbang = implode(":", $hexipbang);
		}
*/		return $hexipbang;
        } else {
		// ipv4 - "7F000001" => "127.0.0.1"
		$hexipbang = explode('.', chunk_split($int_ip, 2, '.'));
		return hexdec($hexipbang[0]). '.' . hexdec($hexipbang[1]) . '.' . hexdec($hexipbang[2]) . '.' . hexdec($hexipbang[3]);
	}
}