class.phpmailer.php

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    /**
     * Assembles message header.  
     * @access private
     * @return string
     */
    function CreateHeader() {
        $result = "";
        
        // Set the boundaries
        $uniq_id = md5(uniqid(time()));
        $this->boundary[1] = "b1_" . $uniq_id;
        $this->boundary[2] = "b2_" . $uniq_id;

        $result .= $this->HeaderLine("Date", $this->RFCDate());
        if($this->Sender == "")
            $result .= $this->HeaderLine("Return-Path", trim($this->From));
        else
            $result .= $this->HeaderLine("Return-Path", trim($this->Sender));
        
        // To be created automatically by mail()
        if($this->Mailer != "mail")
        {
            if(count($this->to) > 0)
                $result .= $this->AddrAppend("To", $this->to);
            else if (count($this->cc) == 0)
                $result .= $this->HeaderLine("To", "undisclosed-recipients:;");
            if(count($this->cc) > 0)
                $result .= $this->AddrAppend("Cc", $this->cc);
        }

        $from = array();
        $from[0][0] = trim($this->From);
        $from[0][1] = $this->FromName;
        $result .= $this->AddrAppend("From", $from); 

        // sendmail and mail() extract Bcc from the header before sending
        if((($this->Mailer == "sendmail") || ($this->Mailer == "mail")) && (count($this->bcc) > 0))
            $result .= $this->AddrAppend("Bcc", $this->bcc);

        if(count($this->ReplyTo) > 0)
            $result .= $this->AddrAppend("Reply-to", $this->ReplyTo);

        // mail() sets the subject itself
        if($this->Mailer != "mail")
            $result .= $this->HeaderLine("Subject", $this->EncodeHeader(trim($this->Subject)));

        $result .= sprintf("Message-ID: <%s@%s>%s", $uniq_id, $this->ServerHostname(), $this->LE);
        $result .= $this->HeaderLine("X-Priority", $this->Priority);
        $result .= $this->HeaderLine("X-Mailer", "PHPMailer [version " . $this->Version . "]");
        
        if($this->ConfirmReadingTo != "")
        {
            $result .= $this->HeaderLine("Disposition-Notification-To", 
                       "<" . trim($this->ConfirmReadingTo) . ">");
        }

        // Add custom headers
        for($index = 0; $index < count($this->CustomHeader); $index++)
        {
            $result .= $this->HeaderLine(trim($this->CustomHeader[$index][0]), 
                       $this->EncodeHeader(trim($this->CustomHeader[$index][1])));
        }
        $result .= $this->HeaderLine("MIME-Version", "1.0");

        switch($this->message_type)
        {
            case "plain":
                $result .= $this->HeaderLine("Content-Transfer-Encoding", $this->Encoding);
                $result .= sprintf("Content-Type: %s; charset=\"%s\"",
                                    $this->ContentType, $this->CharSet);
                break;
            case "attachments":
                // fall through
            case "alt_attachments":
                if($this->InlineImageExists())
                {
                    $result .= sprintf("Content-Type: %s;%s\ttype=\"text/html\";%s\tboundary=\"%s\"%s", 
                                    "multipart/related", $this->LE, $this->LE, 
                                    $this->boundary[1], $this->LE);
                }
                else
                {
                    $result .= $this->HeaderLine("Content-Type", "multipart/mixed;");
                    $result .= $this->TextLine("\tboundary=\"" . $this->boundary[1] . '"');
                }
                break;
            case "alt":
                $result .= $this->HeaderLine("Content-Type", "multipart/alternative;");
                $result .= $this->TextLine("\tboundary=\"" . $this->boundary[1] . '"');
                break;
        }

        if($this->Mailer != "mail")
            $result .= $this->LE.$this->LE;

        return $result;
    }

    /**
     * Assembles the message body.  Returns an empty string on failure.
     * @access private
     * @return string
     */
    function CreateBody() {
        $result = "";

        $this->SetWordWrap();

        switch($this->message_type)
        {
            case "alt":
                $result .= $this->GetBoundary($this->boundary[1], "", 
                                              "text/plain", "");
                $result .= $this->EncodeString($this->AltBody, $this->Encoding);
                $result .= $this->LE.$this->LE;
                $result .= $this->GetBoundary($this->boundary[1], "", 
                                              "text/html", "");
                
                $result .= $this->EncodeString($this->Body, $this->Encoding);
                $result .= $this->LE.$this->LE;
    
                $result .= $this->EndBoundary($this->boundary[1]);
                break;
            case "plain":
                $result .= $this->EncodeString($this->Body, $this->Encoding);
                break;
            case "attachments":
                $result .= $this->GetBoundary($this->boundary[1], "", "", "");
                $result .= $this->EncodeString($this->Body, $this->Encoding);
                $result .= $this->LE;
     
                $result .= $this->AttachAll();
                break;
            case "alt_attachments":
                $result .= sprintf("--%s%s", $this->boundary[1], $this->LE);
                $result .= sprintf("Content-Type: %s;%s" .
                                   "\tboundary=\"%s\"%s",
                                   "multipart/alternative", $this->LE, 
                                   $this->boundary[2], $this->LE.$this->LE);
    
                // Create text body
                $result .= $this->GetBoundary($this->boundary[2], "", 
                                              "text/plain", "") . $this->LE;

                $result .= $this->EncodeString($this->AltBody, $this->Encoding);
                $result .= $this->LE.$this->LE;
    
                // Create the HTML body
                $result .= $this->GetBoundary($this->boundary[2], "", 
                                              "text/html", "") . $this->LE;
    
                $result .= $this->EncodeString($this->Body, $this->Encoding);
                $result .= $this->LE.$this->LE;

                $result .= $this->EndBoundary($this->boundary[2]);
                
                $result .= $this->AttachAll();
                break;
        }
        if($this->IsError())
            $result = "";

        return $result;
    }

    /**
     * Returns the start of a message boundary.
     * @access private
     */
    function GetBoundary($boundary, $charSet, $contentType, $encoding) {
        $result = "";
        if($charSet == "") { $charSet = $this->CharSet; }
        if($contentType == "") { $contentType = $this->ContentType; }
        if($encoding == "") { $encoding = $this->Encoding; }

        $result .= $this->TextLine("--" . $boundary);
        $result .= sprintf("Content-Type: %s; charset = \"%s\"", 
                            $contentType, $charSet);
        $result .= $this->LE;
        $result .= $this->HeaderLine("Content-Transfer-Encoding", $encoding);
        $result .= $this->LE;
       
        return $result;
    }
    
    /**
     * Returns the end of a message boundary.
     * @access private
     */
    function EndBoundary($boundary) {
        return $this->LE . "--" . $boundary . "--" . $this->LE; 
    }
    
    /**
     * Sets the message type.
     * @access private
     * @return void
     */
    function SetMessageType() {
        if(count($this->attachment) < 1 && strlen($this->AltBody) < 1)
            $this->message_type = "plain";
        else
        {
            if(count($this->attachment) > 0)
                $this->message_type = "attachments";
            if(strlen($this->AltBody) > 0 && count($this->attachment) < 1)
                $this->message_type = "alt";
            if(strlen($this->AltBody) > 0 && count($this->attachment) > 0)
                $this->message_type = "alt_attachments";
        }
    }

    /**
     * Returns a formatted header line.
     * @access private
     * @return string
     */
    function HeaderLine($name, $value) {
        return $name . ": " . $value . $this->LE;
    }

    /**
     * Returns a formatted mail line.
     * @access private
     * @return string
     */
    function TextLine($value) {
        return $value . $this->LE;
    }

    /////////////////////////////////////////////////
    // ATTACHMENT METHODS
    /////////////////////////////////////////////////

    /**
     * Adds an attachment from a path on the filesystem.
     * Returns false if the file could not be found
     * or accessed.
     * @param string $path Path to the attachment.
     * @param string $name Overrides the attachment name.
     * @param string $encoding File encoding (see $Encoding).
     * @param string $type File extension (MIME) type.
     * @return bool
     */
    function AddAttachment($path, $name = "", $encoding = "base64", 
                           $type = "application/octet-stream") {
        if(!@is_file($path))
        {
            $this->SetError($this->Lang("file_access") . $path);
            return false;
        }

        $filename = basename($path);
        if($name == "")
            $name = $filename;

        $cur = count($this->attachment);
        $this->attachment[$cur][0] = $path;
        $this->attachment[$cur][1] = $filename;
        $this->attachment[$cur][2] = $name;
        $this->attachment[$cur][3] = $encoding;
        $this->attachment[$cur][4] = $type;
        $this->attachment[$cur][5] = false; // isStringAttachment
        $this->attachment[$cur][6] = "attachment";
        $this->attachment[$cur][7] = 0;

        return true;
    }

    /**
     * Attaches all fs, string, and binary attachments to the message.
     * Returns an empty string on failure.
     * @access private
     * @return string
     */
    function AttachAll() {
        // Return text of body
        $mime = array();

        // Add all attachments
        for($i = 0; $i < count($this->attachment); $i++)
        {
            // Check for string attachment
            $bString = $this->attachment[$i][5];
            if ($bString)
                $string = $this->attachment[$i][0];
            else
                $path = $this->attachment[$i][0];

            $filename    = $this->attachment[$i][1];
            $name        = $this->attachment[$i][2];
            $encoding    = $this->attachment[$i][3];
            $type        = $this->attachment[$i][4];
            $disposition = $this->attachment[$i][6];
            $cid         = $this->attachment[$i][7];
            
            $mime[] = sprintf("--%s%s", $this->boundary[1], $this->LE);
            $mime[] = sprintf("Content-Type: %s; name=\"%s\"%s", $type, $name, $this->LE);
            $mime[] = sprintf("Content-Transfer-Encoding: %s%s", $encoding, $this->LE);

            if($disposition == "inline")
                $mime[] = sprintf("Content-ID: <%s>%s", $cid, $this->LE);

            $mime[] = sprintf("Content-Disposition: %s; filename=\"%s\"%s", 
                              $disposition, $name, $this->LE.$this->LE);

            // Encode as string attachment
            if($bString)
            {
                $mime[] = $this->EncodeString($string, $encoding);
                if($this->IsError()) { return ""; }
                $mime[] = $this->LE.$this->LE;
            }
            else
            {
                $mime[] = $this->EncodeFile($path, $encoding);                
                if($this->IsError()) { return ""; }
                $mime[] = $this->LE.$this->LE;
            }
        }

        $mime[] = sprintf("--%s--%s", $this->boundary[1], $this->LE);

        return join("", $mime);
    }
    
    /**
     * Encodes attachment in requested format.  Returns an
     * empty string on failure.
     * @access private
     * @return string
     */
    function EncodeFile ($path, $encoding = "base64") {
        if(!@$fd = fopen($path, "rb"))
        {
            $this->SetError($this->Lang("file_open") . $path);
            return "";
        }
        $file_buffer = fread($fd, filesize($path));
        $file_buffer = $this->EncodeString($file_buffer, $encoding);
        fclose($fd);

        return $file_buffer;
    }

    /**
     * Encodes string to requested format. Returns an
     * empty string on failure.
     * @access private
     * @return string
     */
    function EncodeString ($str, $encoding = "base64") {
        $encoded = "";
        switch(strtolower($encoding)) {
          case "base64":
              // chunk_split is found in PHP >= 3.0.6
              $encoded = chunk_split(base64_encode($str), 76, $this->LE);
              break;
          case "7bit":
          case "8bit":
              $encoded = $this->FixEOL($str);
              if (substr($encoded, -(strlen($this->LE))) != $this->LE)
                $encoded .= $this->LE;
              break;
          case "binary":
              $encoded = $str;
              break;
          case "quoted-printable":
              $encoded = $this->EncodeQP($str);
              break;
          default:
              $this->SetError($this->Lang("encoding") . $encoding);
              break;
        }