Email Obfuscator

Fri, May 22, 2009

JavaScript, PHP, Snippets

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>GEO</title>
<script type="text/javascript">
//<![CDATA[
window.onload = function () {
    geo();
}

function geo() {
    if (!document.getElementsByTagName) // Check for browser support
            return false;
    if (rot13)
        var map = rot13init(); 

    var links = document.getElementsByTagName('a');

    function geo_decode(anchor) {
        var href = anchor.getAttribute('href');
        var address = href.replace(/.*contact\/([a-z0-9._%-]+)\+([a-z0-9._%-]+)\+([a-z.]+)/i, '$1' + '@' + '$2' + '.' + '$3');
        var linktext = anchor.innerHTML;
            if (href != address) {
                anchor.setAttribute('href','mailto:' + (rot13 ? str_rot13(address,map) : address)); // Add mailto link    
                anchor.innerHTML = linktext; // IE Fix
        }
    }

    for (var l = 0 ; l < links.length ; l++)
    {
        links[l].onclick = function()
        {
            geo_decode(this);
        }

        links[l].onmouseover = function()
        {
                geo_decode(this);

        }
    }
}

var rot13 = 1;

function rot13init() {
    var map = new Array();
    var s = "abcdefghijklmnopqrstuvwxyz";
    for (var i = 0 ; i < s.length ; i++)
        map[s.charAt(i)] = s.charAt((i+13)%26);
    for (var i = 0 ; i < s.length ; i++)
        map[s.charAt(i).toUpperCase()] = s.charAt((i+13)%26).toUpperCase();
    return map;
}

function str_rot13(a,map) {
    var s = "";
    for (var i = 0 ; i < a.length ; i++) {
        var b = a.charAt(i);
        s += (b>='A' && b<='Z' || b>='a' && b<='z' ? map[b] : b);
    }
    return s;
}
//]]>
</script>
</head>

<body>
<?php

function cloakmail($content) {

    preg_match_all("^[-a-z-A-Z-0-9\._]+@[-a-z-A-Z-0-9\._]+\.[a-z]{2,4}^", $content, $emails);

    for($i = 0; $i < count($emails[0]); $i++) {
        $username = explode("@", $emails[0][$i]);
        $domain = explode(".", str_rot13($username[1]));

        if(count($domain) > 2) {
            $replace = '<a href="contact/' . str_rot13($username[0]) . '+'
            . $domain[0] . '+'
            . $domain[1] . '.'
            . $domain[2] .'" rel="nofollow">' . asc2html($emails[0][$i]) . '</a>';
        } else {
            $replace = '<a href="contact/' . str_rot13($username[0]) . '+'
            . $domain[0] . '+'
            . $domain[1] .'" rel="nofollow">' . asc2html($emails[0][$i]) . '</a>';
        }

        $content = str_replace($emails[0][$i], $replace, $content);
    }

    return $content;
}

function asc2html($email) {
    $html = "";
    $len = strlen($email);
    for($i = 0; $i < $len; $i++) {
        $html .= "&#" . ord($email[$i]);
    }
    return $html;
}

$content = "Sidewinder@anything.extreme-hq.com<br />\n
Sidewinder@extreme-hq.com";

echo cloakmail($content);
?>
</body>
</html>

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