mime.php

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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 <[e-mail]>
 * Copyright (c) 2003-2006, PEAR <[e-mail]>
 * 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  <[e-mail]>
 * @author    Tomas V.V. Cox <[e-mail]>
 * @author    Cipriano Groenendal <[e-mail]>
 * @author    Sean Coates <[e-mail]>
 * @copyright 2003-2006 PEAR <[e-mail]>
 * @license   http://www.opensource.org/licenses/bsd-license.php BSD License
 * @version   CVS: $Id: mime.php,v 1.81 2007/06/21 19:08:28 cipri Exp $
 * @link      http://pear.php.net/package/Mail_mime
 *
 *            This class is based on HTML Mime Mail class from
 *            Richard Heyes <[e-mail]> which was based also
 *            in the mime_mail.class by Tobias Ratschiller <[e-mail]>
 *            and Sascha Schumann <[e-mail]>
 */


/**
 * 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  <[e-mail]>
 * @author    Tomas V.V. Cox <[e-mail]>
 * @author    Cipriano Groenendal <[e-mail]>
 * @author    Sean Coates <[e-mail]>
 * @copyright 2003-2006 PEAR <[e-mail]>
 * @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