function.mailto.php

So i have this file in a certain script, i need help getting the bcc option to work, just cant figure it out.

<?php
/**
* Smarty plugin
* @package Smarty
* @subpackage plugins
*/
 
 
/**
* Smarty {mailto} function plugin
*
* Type:    function<br>
* Name:    mailto<br>
* Date:    May 21, 2002
* Purpose:  automate mailto address link creation, and optionally
*          encode them.<br>
* Input:<br>
*        - address = e-mail address
*        - text = (optional) text to display, default is address
*        - encode = (optional) can be one of:
*                * none : no encoding (default)
*                * javascript : encode with javascript
*                * hex : encode with hexidecimal (no javascript)
*        - cc = (optional) address(es) to carbon copy
*        - bcc = (optional) address(es) to blind carbon copy
*        - subject = (optional) e-mail subject
*        - newsgroups = (optional) newsgroup(s) to post to
*        - followupto = (optional) address(es) to follow up to
*        - extra = (optional) extra tags for the href link
*
* Examples:
* <pre>
* {mailto address="me@domain.com"}
* {mailto address="me@domain.com" encode="javascript"}
* {mailto address="me@domain.com" encode="hex"}
* {mailto address="me@domain.com" subject="Hello to you!"}
* {mailto address="me@domain.com" cc="you@domain.com,they@domain.com"}
* {mailto address="me@domain.com" extra='class="mailto"'}
* </pre>
* @link http://smarty.php.net/manual/en/language.function.mailto.php {mailto}
*          (Smarty online manual)
* @version  1.2
* @author  Monte Ohrt <monte@ispi.net>
* @author  credits to Jason Sweat (added cc, bcc and subject functionality)
* @param    array
* @param    Smarty
* @return  string
*/
function smarty_function_mailto($params, &$smarty)
{
    $extra = '';
 
    if (empty($params['address'])) {
        $smarty->trigger_error("mailto: missing 'address' parameter");
        return;
    } else {
        $address = $params['address'];
    }
 
    $text = $address;
 
    // netscape and mozilla do not decode %40 (@) in BCC field (bug?)
    // so, don't encode it.
    $mail_parms = array();
    foreach ($params as $var=>$value) {
        switch ($var) {
            case 'cc':
            case 'bcc':
            case 'followupto':
                if (!empty($value))
                    $mail_parms[] = $var.'='.str_replace('%40','@',rawurlencode($value));
                break;
               
            case 'subject':
            case 'newsgroups':
                $mail_parms[] = $var.'='.rawurlencode($value);
                break;
 
            case 'extra':
            case 'text':
                $$var = $value;
 
            default:
        }
    }
 
    $mail_parm_vals = '';
    for ($i=0; $i<count($mail_parms); $i++) {
        $mail_parm_vals .= (0==$i) ? '?' : '&';
        $mail_parm_vals .= $mail_parms[$i];
    }
    $address .= $mail_parm_vals;
 
    $encode = (empty($params['encode'])) ? 'none' : $params['encode'];
    if (!in_array($encode,array('javascript','hex','none')) ) {
        $smarty->trigger_error("mailto: 'encode' parameter must be none, javascript or hex");
        return;
    }
 
    if ($encode == 'javascript' ) {
        $string = 'document.write(\'<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>\');';
 
        $js_encode = '';
        for ($x=0; $x < strlen($string); $x++) {
            $js_encode .= '%' . bin2hex($string[$x]);
        }
 
        return '<script type="text/javascript">eval(unescape(\''.$js_encode.'\'))</script>';
 
    } elseif ($encode == 'hex') {
 
        preg_match('!^(.*)(\?.*)$!',$address,$match);
        if(!empty($match[2])) {
            $smarty->trigger_error("mailto: hex encoding does not work with extra attributes. Try javascript.");
            return;
        }
        $address_encode = '';
        for ($x=0; $x < strlen($address); $x++) {
            if(preg_match('!\w!',$address[$x])) {
                $address_encode .= '%' . bin2hex($address[$x]);
            } else {
                $address_encode .= $address[$x];
            }
        }
        $text_encode = '';
        for ($x=0; $x < strlen($text); $x++) {
            $text_encode .= '&#x' . bin2hex($text[$x]).';';
        }
 
        $mailto = "&#109;&#97;&#105;&#108;&#116;&#111;&#58;";
        return '<a href="'.$mailto.$address_encode.'" '.$extra.'>'.$text_encode.'</a>';
 
    } else {
        // no encoding
        return '<a href="mailto:'.$address.'" '.$extra.'>'.$text.'</a>';
 
    }
 
}
 
/* vim: set expandtab: */
 
?>

Code (markup):

 

Its in the comments

{mailto address="" bcc=","}