TIS-620 แปลงเป็น HTMl code เปิดเป็น UTF-8 โดย Java Script

function JB_utf8_to_html ($data) {
    return preg_replace("/([\\xC0-\\xF7]{1,1}[\\x80-\\xBF]+)/e", '_utf8_to_html("\\1")', $data);
}

function _utf8_to_html ($data) {

	$data;
	
    $ret = 0;
	
    foreach ((str_split(strrev(chr((ord($data{0}) % 252 % 248 % 240 % 224 % 192) + 128) . substr($data, 1)))) as $k => $v)
        $ret += (ord($v) % 128) * pow(64, $k);
	if ($ret<256) return chr($ret); // no need to convert to entities
    return "&#$ret;";
}

if(!function_exists('str_split')) {
	function str_split($string,$string_length=1) {
		if(strlen($string)>$string_length || !$string_length) {
			do {
				$c = strlen($string);
				$parts[] = substr($string,0,$string_length);
				$string = substr($string,$string_length);
			} while($string !== false);
		} else {
			$parts = array($string);
		}
		return $parts;
	}
}