mime.php

开源邮件管理系统

                $this->_addHtmlImagePart($related, $this->_html_images[$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 $subject String to set the subject to
     * access  public
     */
    function setSubject($subject)
    {
        $this->_headers['Subject'] = $subject;
    }

    /**
     * Set an email to the From (the sender) header
     *
     * @param  string $email The email direction to add
     * @access public
     */
    function setFrom($email)
    {
        $this->_headers['From'] = $email;
    }

    /**
     * Add an email to the Cc (carbon copy) header
     * (multiple calls to this method are allowed)
     *
     * @param  string $email The email direction to add
     * @access public
     */
    function addCc($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 $email The email direction to add
     * @access public
     */
    function addBcc($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;
        }
        
        foreach ($input as $hdr_name => $hdr_value) {
            $hdr_vals = preg_split("|(\s)|", $hdr_value, -1, PREG_SPLIT_DELIM_CAPTURE);
            $hdr_value_out="";
            $previous = "";
            foreach ($hdr_vals as $hdr_val){
                if (!trim($hdr_val)){
                    //whitespace needs to be handled with another string, or it
                    //won't show between encoded strings. Prepend this to the next item.
                    $previous .= $hdr_val;
                    continue;
                }else{
                    $hdr_val = $previous . $hdr_val;
                    $previous = "";
                }
                if (function_exists('iconv_mime_encode') && preg_match('#[\x80-\xFF]{1}#', $hdr_val)){
                    $imePref = array();
                    if ($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'];
                    $hdr_val = iconv_mime_encode($hdr_name, $hdr_val, $imePrefs);
                    $hdr_val = preg_replace("#^{$hdr_name}\:\ #", "", $hdr_val);
                }elseif (preg_match('#[\x80-\xFF]{1}#', $hdr_val)){
                    //This header contains non ASCII chars and should be encoded.
                    switch ($build_params['head_encoding']) {
                    case 'base64':
                        //Base64 encoding has been selected.
                        
                        //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;
                        
                        //Base64 encode the entire string
                        $hdr_val = base64_encode($hdr_val);
                        
                        //This regexp will break base64-encoded text at every 
                        //$maxLength but will not break any encoded letters.
                        $reg1st = "|.{0,$maxLength1stLine}[^\=][^\=]|";
                        $reg2nd = "|.{0,$maxLength}[^\=][^\=]|";
                        break;
                    case 'quoted-printable':
                    default:
                        //quoted-printable encoding has been selected
                        
                        //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 -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'] . '?Q?';
                        $suffix = '?=';
                        $maxLength = 75 - strlen($prefix . $suffix) - 2;
                        $maxLength1stLine = $maxLength - strlen($hdr_name) - 2;
                        
                        //Replace all special characters used by the encoder.
                        $search  = array("=",   "_",   "?",   " ");
                        $replace = array("=3D", "=5F", "=3F", "_");
                        $hdr_val = str_replace($search, $replace, $hdr_val);
                        
                        //Replace all extended characters (\x80-xFF) with their
                        //ASCII values.
                        $hdr_val = preg_replace(
                            '#([\x80-\xFF])#e',
                            '"=" . strtoupper(dechex(ord("\1")))',
                            $hdr_val
                        );
                        //This regexp will break QP-encoded text at every $maxLength
                        //but will not break any encoded letters.
                        $reg1st = "|(.{0,$maxLength1stLine})[^\=]|";
                        $reg2nd = "|(.{0,$maxLength})[^\=]|";
                        break;
                    }
                    //Begin with the regexp for the first line.
                    $reg = $reg1st;
                    //Prevent lins that are just way to short;
                    if ($maxLength1stLine >1){
                        $reg = $reg2nd;
                    }
                    $output = "";
                    while ($hdr_val) {
                        //Split translated string at every $maxLength
                        //But make sure not to break any translated chars.
                        $found = preg_match($reg, $hdr_val, $matches);
                        
                        //After this first line, we need to use a different
                        //regexp for the first line.
                        $reg = $reg2nd;
                        
                        //Save the found part and encapsulate it in the
                        //prefix & suffix. Then remove the part from the
                        //$hdr_val variable.
                        if ($found){
                            $part = $matches[0];
                            $hdr_val = substr($hdr_val, strlen($matches[0]));
                        }else{
                            $part = $hdr_val;
                            $hdr_val = "";
                        }
                        
                        //RFC 2047 specifies that any split header should be seperated
                        //by a CRLF SPACE. 
                        if ($output){
                            $output .=  "\r\n ";
                        }
                        $output .= $prefix . $part . $suffix;
                    }
                    $hdr_val = $output;
                }
                $hdr_value_out .= $hdr_val;
            }
            $input[$hdr_name] = $hdr_value_out;
        }

        return $input;
    }

    /**
     * Set the object's end-of-line and define the constant if applicable
     *
     * @param string $eol End Of Line sequence
     * @access private
     */
    function _setEOL($eol)
    {
        $this->_eol = $eol;
        if (!defined('MAIL_MIME_CRLF')) {
            define('MAIL_MIME_CRLF', $this->_eol, true);
        }
    }

    

} // End of class