CODE EXAMPLE FOR PHP

php obfuscate email

function getObfuscatedEmailLink($email, $params = array())
{
    if (!is_array($params)) {
        $params = array();
    }

    // Tell search engines to ignore obfuscated uri
    if (!isset($params['rel'])) {
        $params['rel'] = 'nofollow';
    }

    $neverEncode = array('.', '@', '+'); // Don't encode those as not fully supported by IE & Chrome

    $urlEncodedEmail = '';
    for ($i = 0; $i < strlen($email); $i++) {
        // Encode 25% of characters
        if (!in_array($email[$i], $neverEncode) && mt_rand(1, 100) < 25) {
            $charCode = ord($email[$i]);
            $urlEncodedEmail .= '%';
            $urlEncodedEmail .= dechex(($charCode >> 4) & 0xF);
            $urlEncodedEmail .= dechex($charCode & 0xF);
        } else {
            $urlEncodedEmail .= $email[$i];
        }
    }

    $obfuscatedEmail = getObfuscatedEmailAddress($email);
    $obfuscatedEmailUrl = getObfuscatedEmailAddress('mailto:' . $urlEncodedEmail);

    $link = '<a href="' . $obfuscatedEmailUrl . '"';
    foreach ($params as $param => $value) {
        $link .= ' ' . $param . '="' . htmlspecialchars($value). '"';
    }
    $link .= '>' . $obfuscatedEmail . '</a>';

    return $link;
}