My goal was to write text in a way that bots cannot read it when shown in a HTML page. Javascript should do.

First thing I've tried was to find a javascript-like decodeURI function in PHP which would have made this work very easy, but the only one I could find (www.captain.at), was not working properly with UTF-8 strings. So I decide to write a very simple one my own.

It's simple the document.write function writing parts of the text. For UTF-8 to work I had to find a function to replace "substr" becouse it does not play well with UTF-8 strings. From the php.net user manual I've found this one:

function utf8_substr($str,$from,$len){
        # utf8 substr
        # www.yeap.lv
          return preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$from.'}'.
                           '((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s',
                           '$1',$str);
    }

After I have that function, the other one was simple:

function js_obfuscate($text,$step=4) {
   echo ''.chr(10);
}

$step defines how many characters the function will print in each document.write call.

Hope you like it! If you find something better, you are free to leave a comment! A encodeURI/decodeURI that works with UTF-8 would be great.