Encode Email Address

<?php
    function encode_email($email='info@domain.com', $linkText='Contact Us', $attrs ='class="emailencoder"' )
    {
        // remplazar aroba y puntos
        $email = str_replace('@', '&#64;', $email);
        $email = str_replace('.', '&#46;', $email);
        $email = str_split($email, 5);

        $linkText = str_replace('@', '&#64;', $linkText);
        $linkText = str_replace('.', '&#46;', $linkText);
        $linkText = str_split($linkText, 5);

        $part1 = '<a href="ma';
        $part2 = 'ilto&#58;';
        $part3 = '" '. $attrs .' >';
        $part4 = '</a>';

        $encoded = '<script type="text/javascript">';
        $encoded .= "document.write('$part1');";
        $encoded .= "document.write('$part2');";
        foreach($email as $e)
        {
                $encoded .= "document.write('$e');";
        }
        $encoded .= "document.write('$part3');";
        foreach($linkText as $l)
        {
                $encoded .= "document.write('$l');";
        }
        $encoded .= "document.write('$part4');";
        $encoded .= '</script>';

        return $encoded;
    }
?>