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<?php

/**

 * The Mail_Mime class is used to create MIME E-mail messages

 *

 * The Mail_Mime class provides an OO interface to create MIME

 * enabled email messages. This way you can create emails that

 * contain plain-text bodies, HTML bodies, attachments, inline

 * images and specific headers.

 *

 * Compatible with PHP versions 4 and 5

 *

 * LICENSE: This LICENSE is in the BSD license style.

 * Copyright (c) 2002-2003, Richard Heyes <richard@phpguru.org>

 * Copyright (c) 2003-2006, PEAR <pear-group@php.net>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - Neither the name of the authors, nor the names of its contributors

 *   may be used to endorse or promote products derived from this

 *   software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 *

 * @category  Mail

 * @package   Mail_Mime

 * @author    Richard Heyes  <richard@phpguru.org>

 * @author    Tomas V.V. Cox <cox@idecnet.com>

 * @author    Cipriano Groenendal <cipri@php.net>

 * @author    Sean Coates <sean@php.net>

 * @copyright 2003-2006 PEAR <pear-group@php.net>

 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License

 * @version   CVS: $Id: mime.php,v 1.1.6.1 2007-11-19 12:53:54 alexandre_tb Exp $

 * @link      http://pear.php.net/package/Mail_mime

 *

 *            This class is based on HTML Mime Mail class from

 *            Richard Heyes <richard@phpguru.org> which was based also

 *            in the mime_mail.class by Tobias Ratschiller <tobias@dnet.it>

 *            and Sascha Schumann <sascha@schumann.cx>

 */

/**

 * require PEAR

 *

 * This package depends on PEAR to raise errors.

 */

require_once 'PEAR.php';

/**

 * require Mail_mimePart

 *

 * Mail_mimePart contains the code required to

 * create all the different parts a mail can

 * consist of.

 */

require_once 'Mail/mimePart.php';

/**

 * The Mail_Mime class provides an OO interface to create MIME

 * enabled email messages. This way you can create emails that

 * contain plain-text bodies, HTML bodies, attachments, inline

 * images and specific headers.

 *

 * @category  Mail

 * @package   Mail_Mime

 * @author    Richard Heyes  <richard@phpguru.org>

 * @author    Tomas V.V. Cox <cox@idecnet.com>

 * @author    Cipriano Groenendal <cipri@php.net>

 * @author    Sean Coates <sean@php.net>

 * @copyright 2003-2006 PEAR <pear-group@php.net>

 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License

 * @version   Release: @package_version@

 * @link      http://pear.php.net/package/Mail_mime

 */

class Mail_mime

{

    /**

     * Contains the plain text part of the email

     *

     * @var string

     * @access private

     */

    var $_txtbody;

    /**

     * Contains the html part of the email

     *

     * @var string

     * @access private

     */

    var $_htmlbody;

    /**

     * contains the mime encoded text

     *

     * @var string

     * @access private

     */

    var $_mime;

    /**

     * contains the multipart content

     *

     * @var string

     * @access private

     */

    var $_multipart;

    /**

     * list of the attached images

     *

     * @var array

     * @access private

     */

    var $_html_images = array();

    /**

     * list of the attachements

     *

     * @var array

     * @access private

     */

    var $_parts = array();

    /**

     * Build parameters

     *

     * @var array

     * @access private

     */

    var $_build_params = array();

    /**

     * Headers for the mail

     *

     * @var array

     * @access private

     */

    var $_headers = array();

    /**

     * End Of Line sequence (for serialize)

     *

     * @var string

     * @access private

     */

    var $_eol;

    /**

     * Constructor function.

     *

     * @param string $crlf what type of linebreak to use.

     *                     Defaults to "\r\n"

     *

     * @return void

     *

     * @access public

     */

    function Mail_mime($crlf = "\r\n")

    {

        $this->_setEOL($crlf);

        $this->_build_params = array(

                                     'head_encoding' => 'quoted-printable',

                                     'text_encoding' => '7bit',

                                     'html_encoding' => 'quoted-printable',

                                     '7bit_wrap'     => 998,

                                     'html_charset'  => 'ISO-8859-1',

                                     'text_charset'  => 'ISO-8859-1',

                                     'head_charset'  => 'ISO-8859-1'

                                    );

    }

    /**

     * wakeup function called by unserialize. It re-sets the EOL constant

     *

     * @access private

     * @return void

     */

    function __wakeup()

    {

        $this->_setEOL($this->_eol);

    }

    /**

     * Accessor function to set the body text. Body text is used if

     * it's not an html mail being sent or else is used to fill the

     * text/plain part that emails clients who don't support

     * html should show.

     *

     * @param string $data   Either a string or

     *                        the file name with the contents

     * @param bool   $isfile If true the first param should be treated

     *                        as a file name, else as a string (default)

     * @param bool   $append If true the text or file is appended to

     *                        the existing body, else the old body is

     *                        overwritten

     *

     * @return mixed   true on success or PEAR_Error object

     * @access public

     */

    function setTXTBody($data, $isfile = false, $append = false)

    {

        if (!$isfile) {

            if (!$append) {

                $this->_txtbody = $data;

            } else {

                $this->_txtbody .= $data;

            }

        } else {

            $cont = $this->_file2str($data);

            if (PEAR::isError($cont)) {

                return $cont;

            }

            if (!$append) {

                $this->_txtbody = $cont;

            } else {

                $this->_txtbody .= $cont;

            }

        }

        return true;

    }

    /**

     * Adds a html part to the mail.

     *

     * @param string $data   either a string or the file name with the

     *                        contents

     * @param bool   $isfile a flag that determines whether $data is a

     *                        filename, or a string(false, default)

     *

     * @return bool    true on success

     * @access public

     */

    function setHTMLBody($data, $isfile = false)

    {

        if (!$isfile) {

            $this->_htmlbody = $data;

        } else {

            $cont = $this->_file2str($data);

            if (PEAR::isError($cont)) {

                return $cont;

            }

            $this->_htmlbody = $cont;

        }

        return true;

    }

    /**

     * Adds an image to the list of embedded images.

     *

     * @param string $file   the image file name OR image data itself

     * @param string $c_type the content type

     * @param string $name   the filename of the image.

     *                        Only used if $file is the image data.

     * @param bool   $isfile whether $file is a filename or not.

     *                        Defaults to true

     *

     * @return bool          true on success

     * @access public

     */

    function addHTMLImage($file, $c_type='application/octet-stream',

                          $name = '', $isfile = true)

    {

        $filedata = ($isfile === true) ? $this->_file2str($file)

                                           : $file;

        if ($isfile === true) {

            $filename = ($name == '' ? $file : $name);

        } else {

            $filename = $name;

        }

        if (PEAR::isError($filedata)) {

            return $filedata;

        }

        $this->_html_images[] = array(

                                      'body'   => $filedata,

                                      'name'   => $filename,

                                      'c_type' => $c_type,

                                      'cid'    => md5(uniqid(time()))

                                     );

        return true;

    }

    /**

     * Adds a file to the list of attachments.

     *

     * @param string $file        The file name of the file to attach

     *                             OR the file contents itself

     * @param string $c_type      The content type

     * @param string $name        The filename of the attachment

     *                             Only use if $file is the contents

     * @param bool   $isfile      Whether $file is a filename or not

     *                             Defaults to true

     * @param string $encoding    The type of encoding to use.

     *                             Defaults to base64.

     *                             Possible values: 7bit, 8bit, base64,

     *                             or quoted-printable.

     * @param string $disposition The content-disposition of this file

     *                             Defaults to attachment.

     *                             Possible values: attachment, inline.

     * @param string $charset     The character set used in the filename

     *                             of this attachment.

     * @param string $language    The language of the attachment

     * @param string $location    The RFC 2557.4 location of the attachment

     *

     * @return mixed true on success or PEAR_Error object

     * @access public

     */

    function addAttachment($file,

                           $c_type      = 'application/octet-stream',

                           $name        = '',

                            $isfile     = true,

                           $encoding    = 'base64',

                           $disposition = 'attachment',

                           $charset     = '',

                            $language   = '',

                           $location    = '')

    {

        $filedata = ($isfile === true) ? $this->_file2str($file)

                                           : $file;

        if ($isfile === true) {

            // Force the name the user supplied, otherwise use $file

            $filename = (strlen($name)) ? $name : $file;

        } else {

            $filename = $name;

        }

        if (!strlen($filename)) {

            $msg = "The supplied filename for the attachment can't be empty";

            $err = PEAR::raiseError($msg);

            return $err;

        }

        $filename = basename($filename);

        if (PEAR::isError($filedata)) {

            return $filedata;

        }

        $this->_parts[] = array(

                                'body'        => $filedata,

                                'name'        => $filename,

                                'c_type'      => $c_type,

                                'encoding'    => $encoding,

                                'charset'     => $charset,

                                'language'    => $language,

                                'location'    => $location,

                                'disposition' => $disposition

                               );

        return true;

    }

    /**

     * Get the contents of the given file name as string

     *

     * @param string $file_name path of file to process

     *

     * @return string  contents of $file_name

     * @access private

     */

    function &_file2str($file_name)

    {

        if (!is_readable($file_name)) {

            $err = PEAR::raiseError('File is not readable ' . $file_name);

            return $err;

        }

        if (!$fd = fopen($file_name, 'rb')) {

            $err = PEAR::raiseError('Could not open ' . $file_name);

            return $err;

        }

        $filesize = filesize($file_name);

        if ($filesize == 0) {

            $cont =  "";

        } else {

            if ($magic_quote_setting = get_magic_quotes_runtime()) {

                set_magic_quotes_runtime(0);

            }

            $cont = fread($fd, $filesize);

            if ($magic_quote_setting) {

                set_magic_quotes_runtime($magic_quote_setting);

            }

        }

        fclose($fd);

        return $cont;

    }

    /**

     * Adds a text subpart to the mimePart object and

     * returns it during the build process.

     *

     * @param mixed  &$obj The object to add the part to, or

     *                      null if a new object is to be created.

     * @param string $text The text to add.

     *

     * @return object  The text mimePart object

     * @access private

     */

    function &_addTextPart(&$obj, $text)

    {

        $params['content_type'] = 'text/plain';

        $params['encoding']     = $this->_build_params['text_encoding'];

        $params['charset']      = $this->_build_params['text_charset'];

        if (is_object($obj)) {

            $ret = $obj->addSubpart($text, $params);

            return $ret;

        } else {

            $ret = new Mail_mimePart($text, $params);

            return $ret;

        }

    }

    /**

     * Adds a html subpart to the mimePart object and

     * returns it during the build process.

     *

     * @param mixed &$obj The object to add the part to, or

     *                     null if a new object is to be created.

     *

     * @return object The html mimePart object

     * @access private

     */

    function &_addHtmlPart(&$obj)

    {

        $params['content_type'] = 'text/html';

        $params['encoding']     = $this->_build_params['html_encoding'];

        $params['charset']      = $this->_build_params['html_charset'];

        if (is_object($obj)) {

            $ret = $obj->addSubpart($this->_htmlbody, $params);

            return $ret;

        } else {

            $ret = new Mail_mimePart($this->_htmlbody, $params);

            return $ret;

        }

    }

    /**

     * Creates a new mimePart object, using multipart/mixed as

     * the initial content-type and returns it during the

     * build process.

     *

     * @return object The multipart/mixed mimePart object

     * @access private

     */

    function &_addMixedPart()

    {

        $params                 = array();

        $params['content_type'] = 'multipart/mixed';

        //Create empty multipart/mixed Mail_mimePart object to return

        $ret = new Mail_mimePart('', $params);

        return $ret;

    }

    /**

     * Adds a multipart/alternative part to a mimePart

     * object (or creates one), and returns it during

     * the build process.

     *

     * @param mixed &$obj The object to add the part to, or

     *                     null if a new object is to be created.

     *

     * @return object  The multipart/mixed mimePart object

     * @access private

     */

    function &_addAlternativePart(&$obj)

    {

        $params['content_type'] = 'multipart/alternative';

        if (is_object($obj)) {

            return $obj->addSubpart('', $params);

        } else {

            $ret = new Mail_mimePart('', $params);

            return $ret;

        }

    }

    /**

     * Adds a multipart/related part to a mimePart

     * object (or creates one), and returns it during

     * the build process.

     *

     * @param mixed &$obj The object to add the part to, or

     *                     null if a new object is to be created

     *

     * @return object  The multipart/mixed mimePart object

     * @access private

     */

    function &_addRelatedPart(&$obj)

    {

        $params['content_type'] = 'multipart/related';

        if (is_object($obj)) {

            return $obj->addSubpart('', $params);

        } else {

            $ret = new Mail_mimePart('', $params);

            return $ret;

        }

    }

    /**

     * Adds an html image subpart to a mimePart object

     * and returns it during the build process.

     *

     * @param object &$obj  The mimePart to add the image to

     * @param array  $value The image information

     *

     * @return object  The image mimePart object

     * @access private

     */

    function &_addHtmlImagePart(&$obj, $value)

    {

        $params['content_type'] = $value['c_type'];

        $params['encoding']     = 'base64';

        $params['disposition']  = 'inline';

        $params['dfilename']    = $value['name'];

        $params['cid']          = $value['cid'];

        $ret = $obj->addSubpart($value['body'], $params);

        return $ret;

    }

    /**

     * Adds an attachment subpart to a mimePart object

     * and returns it during the build process.

     *

     * @param object &$obj  The mimePart to add the image to

     * @param array  $value The attachment information

     *

     * @return object  The image mimePart object

     * @access private

     */

    function &_addAttachmentPart(&$obj, $value)

    {

        $params['dfilename'] = $value['name'];

        $params['encoding']  = $value['encoding'];

        if ($value['charset']) {

            $params['charset'] = $value['charset'];

        }

        if ($value['language']) {

            $params['language'] = $value['language'];

        }

        if ($value['location']) {

            $params['location'] = $value['location'];

        }

        $params['content_type'] = $value['c_type'];

        $params['disposition']  = isset($value['disposition']) ?

                                  $value['disposition'] : 'attachment';

        $ret = $obj->addSubpart($value['body'], $params);

        return $ret;

    }

    /**

     * Returns the complete e-mail, ready to send using an alternative

     * mail delivery method. Note that only the mailpart that is made

     * with Mail_Mime is created. This means that,

     * YOU WILL HAVE NO TO: HEADERS UNLESS YOU SET IT YOURSELF

     * using the $xtra_headers parameter!

     *

     * @param string $separation   The separation etween these two parts.

     * @param array  $build_params The Build parameters passed to the

     *                             &get() function. See &get for more info.

     * @param array  $xtra_headers The extra headers that should be passed

     *                             to the &headers() function.

     *                             See that function for more info.

     * @param bool   $overwrite    Overwrite the existing headers with new.

     *

     * @return string The complete e-mail.

     * @access public

     */

    function getMessage(

                        $separation   = null,

                        $build_params = null,

                        $xtra_headers = null,

                        $overwrite    = false

                       )

    {

        if ($separation === null) {

            $separation = MAIL_MIME_CRLF;

        }

        $body = $this->get($build_params);

        $head = $this->txtHeaders($xtra_headers, $overwrite);

        $mail = $head . $separation . $body;

        return $mail;

    }

    /**

     * Builds the multipart message from the list ($this->_parts) and

     * returns the mime content.

     *

     * @param array $build_params Build parameters that change the way the email

     *                             is built. Should be associative. Can contain:

     *                head_encoding  -  What encoding to use for the headers.

     *                                  Options: quoted-printable or base64

     *                                  Default is quoted-printable

     *                text_encoding  -  What encoding to use for plain text

     *                                  Options: 7bit, 8bit,

     *                                  base64, or quoted-printable

     *                                  Default is 7bit

     *                html_encoding  -  What encoding to use for html

     *                                  Options: 7bit, 8bit,

     *                                  base64, or quoted-printable

     *                                  Default is quoted-printable

     *                7bit_wrap      -  Number of characters before text is

     *                                  wrapped in 7bit encoding

     *                                  Default is 998

     *                html_charset   -  The character set to use for html.

     *                                  Default is iso-8859-1

     *                text_charset   -  The character set to use for text.

     *                                  Default is iso-8859-1

     *                head_charset   -  The character set to use for headers.

     *                                  Default is iso-8859-1

     *

     * @return string The mime content

     * @access public

     */

    function &get($build_params = null)

    {

        if (isset($build_params)) {

            while (list($key, $value) = each($build_params)) {

                $this->_build_params[$key] = $value;

            }

        }

        if (isset($this->_headers['From'])){

            $domain = @strstr($this->_headers['From'],'@');

            //Bug #11381: Illegal characters in domain ID

            $domain = str_replace(array("<", ">", "&", "(", ")", " ", "\"", "'"), "", $domain);

            $domain = urlencode($domain);

            foreach($this->_html_images as $i => $img){

                $this->_html_images[$i]['cid'] = $this->_html_images[$i]['cid'] . $domain;

            }

        }

        if (count($this->_html_images) AND isset($this->_htmlbody)) {

            foreach ($this->_html_images as $key => $value) {

                $regex   = array();

                $regex[] = '#(\s)((?i)src|background|href(?-i))\s*=\s*(["\']?)' .

                            preg_quote($value['name'], '#') . '\3#';

                $regex[] = '#(?i)url(?-i)\(\s*(["\']?)' .

                            preg_quote($value['name'], '#') . '\1\s*\)#';

                $rep   = array();

                $rep[] = '\1\2=\3cid:' . $value['cid'] .'\3';

                $rep[] = 'url(\1cid:' . $value['cid'] . '\2)';

                $this->_htmlbody = preg_replace($regex, $rep, $this->_htmlbody);

                $this->_html_images[$key]['name'] =

                    basename($this->_html_images[$key]['name']);

            }

        }

        $null        = null;

        $attachments = count($this->_parts)                 ? true : false;

        $html_images = count($this->_html_images)           ? true : false;

        $html        = strlen($this->_htmlbody)             ? true : false;

        $text        = (!$html AND strlen($this->_txtbody)) ? true : false;

        switch (true) {

        case $text AND !$attachments:

            $message =& $this->_addTextPart($null, $this->_txtbody);

            break;

        case !$text AND !$html AND $attachments:

            $message =& $this->_addMixedPart();

            for ($i = 0; $i < count($this->_parts); $i++) {

                $this->_addAttachmentPart($message, $this->_parts[$i]);

            }

            break;

        case $text AND $attachments:

            $message =& $this->_addMixedPart();

            $this->_addTextPart($message, $this->_txtbody);

            for ($i = 0; $i < count($this->_parts); $i++) {

                $this->_addAttachmentPart($message, $this->_parts[$i]);

            }

            break;

        case $html AND !$attachments AND !$html_images:

            if (isset($this->_txtbody)) {

                $message =& $this->_addAlternativePart($null);

                $this->_addTextPart($message, $this->_txtbody);

                $this->_addHtmlPart($message);

            } else {

                $message =& $this->_addHtmlPart($null);

            }

            break;

        case $html AND !$attachments AND $html_images:

            $message =& $this->_addRelatedPart($null);

            if (isset($this->_txtbody)) {

                $alt =& $this->_addAlternativePart($message);

                $this->_addTextPart($alt, $this->_txtbody);

                $this->_addHtmlPart($alt);

            } else {

                $this->_addHtmlPart($message);

            }

            for ($i = 0; $i < count($this->_html_images); $i++) {

                $this->_addHtmlImagePart($message, $this->_html_images[$i]);

            }

            break;

        case $html AND $attachments AND !$html_images:

            $message =& $this->_addMixedPart();

            if (isset($this->_txtbody)) {

                $alt =& $this->_addAlternativePart($message);

                $this->_addTextPart($alt, $this->_txtbody);

                $this->_addHtmlPart($alt);

            } else {

                $this->_addHtmlPart($message);

            }

            for ($i = 0; $i < count($this->_parts); $i++) {

                $this->_addAttachmentPart($message, $this->_parts[$i]);

            }

            break;

        case $html AND $attachments AND $html_images:

            $message =& $this->_addMixedPart();

            if (isset($this->_txtbody)) {

                $alt =& $this->_addAlternativePart($message);

                $this->_addTextPart($alt, $this->_txtbody);

                $rel =& $this->_addRelatedPart($alt);

            } else {

                $rel =& $this->_addRelatedPart($message);

            }

            $this->_addHtmlPart($rel);

            for ($i = 0; $i < count($this->_html_images); $i++) {

                $this->_addHtmlImagePart($rel, $this->_html_images[$i]);

            }

            for ($i = 0; $i < count($this->_parts); $i++) {

                $this->_addAttachmentPart($message, $this->_parts[$i]);

            }

            break;

        }

        if (isset($message)) {

            $output = $message->encode();

            $this->_headers = array_merge($this->_headers,

                                          $output['headers']);

            $body = $output['body'];

            return $body;

        } else {

            $ret = false;

            return $ret;

        }

    }

    /**

     * Returns an array with the headers needed to prepend to the email

     * (MIME-Version and Content-Type). Format of argument is:

     * $array['header-name'] = 'header-value';

     *

     * @param array $xtra_headers Assoc array with any extra headers.

     *                             Optional.

     * @param bool  $overwrite    Overwrite already existing headers.

     *

     * @return array Assoc array with the mime headers

     * @access public

     */

    function &headers($xtra_headers = null, $overwrite = false)

    {

        // Content-Type header should already be present,

        // So just add mime version header

        $headers['MIME-Version'] = '1.0';

        if (isset($xtra_headers)) {

            $headers = array_merge($headers, $xtra_headers);

        }

        if ($overwrite) {

            $this->_headers = array_merge($this->_headers, $headers);

        } else {

            $this->_headers = array_merge($headers, $this->_headers);

        }

        $encodedHeaders = $this->_encodeHeaders($this->_headers);

        return $encodedHeaders;

    }

    /**

     * Get the text version of the headers

     * (usefull if you want to use the PHP mail() function)

     *

     * @param array $xtra_headers Assoc array with any extra headers.

     *                             Optional.

     * @param bool  $overwrite    Overwrite the existing heaers with new.

     *

     * @return string  Plain text headers

     * @access public

     */

    function txtHeaders($xtra_headers = null, $overwrite = false)

    {

        $headers = $this->headers($xtra_headers, $overwrite);

        $ret = '';

        foreach ($headers as $key => $val) {

            $ret .= "$key: $val" . MAIL_MIME_CRLF;

        }

        return $ret;

    }

    /**

     * Sets the Subject header

     *

     * @param string $subject String to set the subject to.

     *

     * @return void

     * @access public

     */

    function setSubject($subject)

    {

        $this->_headers['Subject'] = $subject;

    }

    /**

     * Set an email to the From (the sender) header

     *

     * @param string $email The email address to use

     *

     * @return void

     * @access public

     */

    function setFrom($email)

    {

        $this->_headers['From'] = $email;

    }

    /**

     * Add an email to the Cc (carbon copy) header

     * (multiple calls to this method are allowed)

     *

     * @param string $email The email direction to add

     *

     * @return void

     * @access public

     */

    function addCc($email)

    {

        if (isset($this->_headers['Cc'])) {

            $this->_headers['Cc'] .= ", $email";

        } else {

            $this->_headers['Cc'] = $email;

        }

    }

    /**

     * Add an email to the Bcc (blank carbon copy) header

     * (multiple calls to this method are allowed)

     *

     * @param string $email The email direction to add

     *

     * @return void

     * @access public

     */

    function addBcc($email)

    {

        if (isset($this->_headers['Bcc'])) {

            $this->_headers['Bcc'] .= ", $email";

        } else {

            $this->_headers['Bcc'] = $email;

        }

    }

    /**

     * Since the PHP send function requires you to specifiy

     * recipients (To: header) separately from the other

     * headers, the To: header is not properly encoded.

     * To fix this, you can use this public method to

     * encode your recipients before sending to the send

     * function

     *

     * @param string $recipients A comma-delimited list of recipients

     *

     * @return string Encoded data

     * @access public

     */

    function encodeRecipients($recipients)

    {

        $input = array("To" => $recipients);

        $retval = $this->_encodeHeaders($input);

        return $retval["To"] ;

    }

    /**

     * Encodes a header as per RFC2047

     *

     * @param array $input  The header data to encode

     * @param array $params Extra build parameters

     *

     * @return array Encoded data

     * @access private

     */

    function _encodeHeaders($input, $params = array())

    {

        $build_params = $this->_build_params;

        while (list($key, $value) = each($params)) {

            $build_params[$key] = $value;

        }

        //$hdr_name: Name of the heaer

        //$hdr_value: Full line of header value.

        //$hdr_value_out: The recombined $hdr_val-atoms, or the encoded string.

        $useIconv = true;

        if (isset($build_params['ignore-iconv'])) {

            $useIconv = !$build_params['ignore-iconv'];

        }

        foreach ($input as $hdr_name => $hdr_value) {

            if (preg_match('#([\x80-\xFF]){1}#', $hdr_value)) {

                if (function_exists('iconv_mime_encode') && $useIconv) {

                    $imePrefs = array();

                    if ($build_params['head_encoding'] == 'base64') {

                        $imePrefs['scheme'] = 'B';

                    } else {

                        $imePrefs['scheme'] = 'Q';

                    }

                    $imePrefs['input-charset']  = $build_params['head_charset'];

                    $imePrefs['output-charset'] = $build_params['head_charset'];

                    $imePrefs['line-length'] = 74;

                    $imePrefs['line-break-chars'] = "\r\n"; //Specified in RFC2047

                    $hdr_value = iconv_mime_encode($hdr_name, $hdr_value, $imePrefs);

                    $hdr_value = preg_replace("#^{$hdr_name}\:\ #", "", $hdr_value);

                } elseif ($build_params['head_encoding'] == 'base64') {

                    //Base64 encoding has been selected.

                    //Base64 encode the entire string

                    $hdr_value = base64_encode($hdr_value);

                    //Generate the header using the specified params and dynamicly

                    //determine the maximum length of such strings.

                    //75 is the value specified in the RFC. The first -2 is there so

                    //the later regexp doesn't break any of the translated chars.

                    //The -2 on the first line-regexp is to compensate for the ": "

                    //between the header-name and the header value

                    $prefix = '=?' . $build_params['head_charset'] . '?B?';

                    $suffix = '?=';

                    $maxLength = 75 - strlen($prefix . $suffix) - 2;

                    $maxLength1stLine = $maxLength - strlen($hdr_name) - 2;

                    //We can cut base4 every 4 characters, so the real max

                    //we can get must be rounded down.

                    $maxLength = $maxLength - ($maxLength % 4);

                    $maxLength1stLine = $maxLength1stLine - ($maxLength1stLine % 4);

                    $cutpoint = $maxLength1stLine;

                    $hdr_value_out = $hdr_value;

                    $output = "";

                    while ($hdr_value_out) {