How to send MIME email in PHP

How to send MIME email in PHP How to send MIME email in PHP How to send MIME email in PHP

How to send MIME email in PHP How to send MIME email in PHP How to send MIME email in PHP

How to send MIME email in PHP

////////////////////////////////////////////////////
// phpmailer - PHP email class
//
// Version 1.50, Created 11/08/2001
//
// Class for sending email using either
// sendmail, PHP mail(), or SMTP.  Methods are
// based upon the standard AspEmail(tm) classes.
//
// Author: Brent R. Matzelle <bmatzelle@yahoo.com>
//
// License: LGPL, see LICENSE
////////////////////////////////////////////////////

/**
 * phpmailer - PHP email transport class
 * @author Brent R. Matzelle
 */
class phpmailer
{
    /////////////////////////////////////////////////
    // PUBLIC VARIABLES
    /////////////////////////////////////////////////

    /**
     * Email priority (1 = High, 3 = Normal, 5 = low). Default value is 3.
     * @public
     * @type int
     */
    var $Priority          = 3;

    /**
     * Sets the CharSet of the message. Default value is "iso-8859-1".
     * @public
     * @type string
     */
    var $CharSet           = "iso-8859-1";

    /**
     * Sets the Content-type of the message. Default value is "text/plain".
     * @public
     * @type string
     */
    var $ContentType        = "text/plain";

    /**
     * Sets the Encoding of the message. Options for this are "8bit" (default),
     * "7bit", "binary", "base64", and "quoted-printable".
     * @public
     * @type string
     */
    var $Encoding          = "8bit";

    /**
     * Holds the most recent mailer error message. Default value is "".
     * @public
     * @type string
     */
    var $ErrorInfo        = "";

    /**
     * Sets the From email address for the message. Default value is "root@localhost".
     * @public
     * @type string
     */
    var $From               = "root@localhost";

    /**
     * Sets the From name of the message. Default value is "Root User".
     * @public
     * @type string
     */
    var $FromName          = "Root User";

    /**
     * Sets the Sender email of the message. If not empty, will be sent via -f to sendmail
     * or as 'MAIL FROM' in smtp mode. Default value is "".
     * @public
     * @type string
     */
    var $Sender            = "";

    /**
     * Sets the Subject of the message. Default value is "".
     * @public
     * @type string
     */
    var $Subject           = "";

    /**
     * Sets the Body of the message.  This can be either an HTML or text body.
     * If HTML then run IsHTML(true). Default value is "".
     * @public
     * @type string
     */
    var $Body               = "";

    /**
     * Sets the text-only body of the message.  This automatically sets the
     * email to multipart/alternative.  This body can be read by mail
     * clients that do not have HTML email capability such as mutt. Clients
     * that can read HTML will view the normal Body.
     * Default value is "".
     * @public
     * @type string
     */
    var $AltBody           = "";

    /**
     * Sets word wrapping on the message. Default value is 0 (off).
     * @public
     * @type int
     */
    var $WordWrap          = 0;

    /**
     * Method to send mail: ("mail", "sendmail", or "smtp").
     * Default value is "mail".
     * @public
     * @type string
     */
    var $Mailer            = "mail";

    /**
     * Sets the path of the sendmail program. Default value is
     * "/usr/sbin/sendmail".
     * @public
     * @type string
     */
    var $Sendmail          = "/usr/sbin/sendmail";

    /**
     *  Turns Microsoft mail client headers on and off.  Useful mostly
     *  for older clients. Default value is false (off).
     *  @public
     *  @type bool
     */
    var $UseMSMailHeaders = false;

    /**
     *  Holds phpmailer version.
     *  @public
     *  @type string
     */
    var $Version           = "1.50";


    /////////////////////////////////////////////////
    // SMTP VARIABLES
    /////////////////////////////////////////////////

    /**
     *  Sets the SMTP hosts.  All hosts must be separated by a
     *  semicolon.  You can also specify a different port
     *  for each host by using this format: [hostname:port]
     *  (e.g. "smtp1.domain.com:25;smtp2.domain.com").
     *  Hosts will be tried in order.
     *  Default value is "localhost".
     *  @public
     *  @type string
     */
    var $Host        = "localhost";

    /**
     *  Sets the default SMTP server port. Default value is 25.
     *  @public
     *  @type int
     */
    var $Port        = 25;

    /**
     *  Sets the SMTP HELO of the message.
     *  Default value is "localhost.localdomain".
     *  @public
     *  @type string
     */
    var $Helo        = "localhost.localdomain";

    /**
     *  Sets SMTP authentication. Utilizes the Username and Password variables.
     *  Default value is false (off).
     *  @public
     *  @type bool
     */
    var $SMTPAuth     = false;

    /**
     *  Sets SMTP username. Default value is "".
     *  @public
     *  @type string
     */
    var $Username     = "";

    /**
     *  Sets SMTP password. Default value is "".
     *  @public
     *  @type string
     */
    var $Password     = "";

    /**
     *  Sets the SMTP server timeout in seconds. Does not function at this time
     *  because PHP for win32 does not support it. Default value is 10.
     *  @public
     *  @type int
     */
    var $Timeout      = 10;

    /**
     *  Sets SMTP class debugging on or off. Default value is false (off).
     *  @public
     *  @type bool
     */
    var $SMTPDebug    = false;


    /////////////////////////////////////////////////
    // PRIVATE VARIABLES
    /////////////////////////////////////////////////

    /**
     *  Holds all "To" addresses.
     *  @type array
     */
    var $to              = array();

    /**
     *  Holds all "CC" addresses.
     *  @type array
     */
    var $cc              = array();

    /**
     *  Holds all "BCC" addresses.
     *  @type array
     */
    var $bcc             = array();

    /**
     *  Holds all "Reply-To" addresses.
     *  @type array
     */
    var $ReplyTo         = array();

    /**
     *  Holds all string and binary attachments.
     *  @type array
     */
    var $attachment      = array();

    /**
     *  Holds all custom headers.
     *  @type array
     */
    var $CustomHeader    = array();

    /**
     *  Holds the message boundary. Default is false.
     *  @type string
     */
    var $boundary        = false;

    /**
     *  Holds the message boundary. This is used specifically
     *  when multipart/alternative messages are sent. Default is false.
     *  @type string
     */
    var $subboundary     = false;


    /////////////////////////////////////////////////
    // VARIABLE METHODS
    /////////////////////////////////////////////////

    /**
     * Sets message type to HTML.  Returns void.
     * @public
     * @returns void
     */
    function IsHTML($bool) {
        if($bool == true)
            $this->ContentType = "text/html";
        else
            $this->ContentType = "text/plain";
    }

    /**
     * Sets Mailer to send message using SMTP.
     * Returns void.
     * @public
     * @returns void
     */
    function IsSMTP() {
        $this->Mailer = "smtp";
    }

    /**
     * Sets Mailer to send message using PHP mail() function.
     * Returns void.
     * @public
     * @returns void
     */
    function IsMail() {
        $this->Mailer = "mail";
    }

    /**
     * Sets Mailer to send message using the $Sendmail program.
     * Returns void.
     * @public
     * @returns void
     */
    function IsSendmail() {
        $this->Mailer = "sendmail";
    }

    /**
     * Sets Mailer to send message using the qmail MTA.  Returns void.
     * @public
     * @returns void
     */
    function IsQmail() {
        //$this->Sendmail = "/var/qmail/bin/qmail-inject";
        $this->Sendmail = "/var/qmail/bin/sendmail";
        $this->Mailer = "sendmail";
    }


    /////////////////////////////////////////////////
    // RECIPIENT METHODS
    /////////////////////////////////////////////////

    /**
     * Adds a "To" address.  Returns void.
     * @public
     * @returns void
     */
    function AddAddress($address, $name = "") {
        $cur = count($this->to);
        $this->to[$cur][0] = trim($address);
        $this->to[$cur][1] = $name;
    }

    /**
     * Adds a "Cc" address. Note: this function works
     * with the SMTP mailer on win32, not with the "mail"
     * mailer.  This is a PHP bug that has been submitted
     * on http://bugs.php.net. The *NIX version of PHP
     * functions correctly. Returns void.
     * @public
     * @returns void
     */
    function AddCC($address, $name = "") {
        $cur = count($this->cc);
        $this->cc[$cur][0] = trim($address);
        $this->cc[$cur][1] = $name;
    }

    /**
     * Adds a "Bcc" address. Note: this function works
     * with the SMTP mailer on win32, not with the "mail"
     * mailer.  This is a PHP bug that has been submitted
     * on http://bugs.php.net. The *NIX version of PHP
     * functions correctly.
     * Returns void.
     * @public
     * @returns void
     */
    function AddBCC($address, $name = "") {
        $cur = count($this->bcc);
        $this->bcc[$cur][0] = trim($address);
        $this->bcc[$cur][1] = $name;
    }

    /**
     * Adds a "Reply-to" address.  Returns void.
     * @public
     * @returns void
     */
    function AddReplyTo($address, $name = "") {
        $cur = count($this->ReplyTo);
        $this->ReplyTo[$cur][0] = trim($address);
        $this->ReplyTo[$cur][1] = $name;
    }


    /////////////////////////////////////////////////
    // MAIL SENDING METHODS
    /////////////////////////////////////////////////

    /**
     * Creates message and assigns Mailer. If the message is
     * not sent successfully then it returns false.  Use the ErrorInfo
     * variable to view description of the error.  Returns bool.
     * @public
     * @returns bool
     */
    function Send() {
        if(count($this->to) < 1)
        {
            $this->error_handler("You must provide at least one recipient email address");
            return false;
        }

        // Set whether the message is multipart/alternative
        if(!empty($this->AltBody))
            $this->ContentType = "multipart/alternative";

        $header = $this->create_header();
        if(!$body = $this->create_body())
            return false;

 

        // Choose the mailer
        if($this->Mailer == "sendmail")
        {
          if(!$this->sendmail_send($header, $body))
              return false;
        }
        elseif($this->Mailer == "mail")
        {
          if(!$this->mail_send($header, $body))
              return false;
        }
        elseif($this->Mailer == "smtp")
        {
          if(!$this->smtp_send($header, $body))
              return false;
        }
        else
        {
            $this->error_handler(sprintf("%s mailer is not supported", $this->Mailer));
            return false;
        }

        return true;
    }

    /**
     * Sends mail using the $Sendmail program.  Returns bool.
     * @private
     * @returns bool
     */
    function sendmail_send($header, $body) {
        if ($this->Sender != "")
            $sendmail = sprintf("%s -oi -f %s -t", $this->Sendmail, $this->Sender);
        else
            $sendmail = sprintf("%s -oi -t", $this->Sendmail);

        if(!@$mail = popen($sendmail, "w"))
        {
            $this->error_handler(sprintf("Could not execute %s", $this->Sendmail));
            return false;
        }

        fputs($mail, $header);
        fputs($mail, $body);
        pclose($mail);

        return true;
    }

    /**
     * Sends mail using the PHP mail() function.  Returns bool.
     * @private
     * @returns bool
     */
    function mail_send($header, $body) {
        //$to = substr($this->addr_append("To", $this->to), 4, -2);

        // Cannot add Bcc's to the $to
        $to = $this->to[0][0]; // no extra comma
        for($i = 1; $i < count($this->to); $i++)
            $to .= sprintf(",%s", $this->to[$i][0]);

        if ($this->Sender != "" && PHP_VERSION >= "4.0")
        {
            $old_from = ini_get("sendmail_from");
            ini_set("sendmail_from", $this->Sender);
        }

        if ($this->Sender != "" && PHP_VERSION >= "4.0.5")
        {
            // The fifth parameter to mail is only available in PHP >= 4.0.5
            $params = sprintf("-oi -f %s", $this->Sender);
            $rt = @mail($to, $this->Subject, $body, $header, $params);
        }
        else
        {
            //echo "<hr><div>Body:<pre>".htmlspecialchars($body)."</pre></div>";
            //echo "<div>Header:<pre>".htmlspecialchars($header)."</pre></div>";
            $rt = @mail($to, $this->Subject, $body, $header);
           

           
        }

        if (isset($old_from))
            ini_set("sendmail_from", $old_from);

        if(!$rt)
        {
            $this->error_handler("Could not instantiate mail()");
            return false;
        }

        return true;
    }

    /**
     * Sends mail via SMTP using PhpSMTP (Author:
     * Chris Ryan).  Returns bool.  Returns false if there is a
     * bad MAIL FROM, RCPT, or DATA input.
     * @private
     * @returns bool
     */
    function smtp_send($header, $body) {
        // Include SMTP class code, but not twice
        //include_once("class.smtp.php"); // Load code only if asked

        $smtp = new SMTP;

        $smtp->do_debug = $this->SMTPDebug;

        // Try to connect to all SMTP servers
        $hosts = explode(";", $this->Host);
        $index = 0;
        $connection = false;
        $smtp_from = "";
        $bad_rcpt = array();
        $e = "";

        // Retry while there is no connection
        while($index < count($hosts) && $connection == false)
        {
            if(strstr($hosts[$index], ":"))
                list($host, $port) = explode(":", $hosts[$index]);
            else
            {
                $host = $hosts[$index];
                $port = $this->Port;
            }

            if($smtp->Connect($host, $port, $this->Timeout))
                $connection = true;
            //printf("%s host could not connect<br>", $hosts[$index]); //debug only
            $index++;
        }
        if(!$connection)
        {
            $this->error_handler("SMTP Error: could not connect to SMTP host server(s)");
            return false;
        }

        // Must perform HELO before authentication
        $smtp->Hello($this->Helo);

        // If user requests SMTP authentication
        if($this->SMTPAuth)
        {
            if(!$smtp->Authenticate($this->Username, $this->Password))
            {
                $this->error_handler("SMTP Error: Could not authenticate");
                return false;
            }
        }

        if ($this->Sender == "")
            $smtp_from = $this->From;
        else
            $smtp_from = $this->Sender;

        if(!$smtp->Mail(sprintf("<%s>", $smtp_from)))
        {
            $e = sprintf("SMTP Error: From address [%s] failed", $smtp_from);
            $this->error_handler($e);
            return false;
        }

        // Attempt to send attach all recipients
        for($i = 0; $i < count($this->to); $i++)
        {
            if(!$smtp->Recipient(sprintf("<%s>", $this->to[$i][0])))
                $bad_rcpt[] = $this->to[$i][0];
        }
        for($i = 0; $i < count($this->cc); $i++)
        {
            if(!$smtp->Recipient(sprintf("<%s>", $this->cc[$i][0])))
                $bad_rcpt[] = $this->cc[$i][0];
        }
        for($i = 0; $i < count($this->bcc); $i++)
        {
            if(!$smtp->Recipient(sprintf("<%s>", $this->bcc[$i][0])))
                $bad_rcpt[] = $this->bcc[$i][0];
        }

        // Create error message
        if(count($bad_rcpt) > 0)
        {
            for($i = 0; $i < count($bad_rcpt); $i++)
            {
                if($i != 0)
                    $e .= ", ";
                $e .= $bad_rcpt[$i];
            }
            $e = sprintf("SMTP Error: The following recipients failed [%s]", $e);
            $this->error_handler($e);

            return false;
        }


        if(!$smtp->Data(sprintf("%s%s", $header, $body)))
        {
            $this->error_handler("SMTP Error: Data not accepted");
            return false;
        }
        $smtp->Quit();

        return true;
    }


    /////////////////////////////////////////////////
    // MESSAGE CREATION METHODS
    /////////////////////////////////////////////////

    /**
     * Creates recipient headers.  Returns string.
     * @private
     * @returns string
     */
    function addr_append($type, $addr) {
        $addr_str = "";
        $addr_str .= sprintf("%s: \"%s\" <%s>", $type, addslashes($addr[0][1]), $addr[0][0]);
        if(count($addr) > 1)
        {
            for($i = 1; $i < count($addr); $i++)
            {
                $addr_str .= sprintf(", \"%s\" <%s>", addslashes($addr[$i][1]), $addr[$i][0]);
            }
            $addr_str .= "\n";
        }
        else
            $addr_str .= "\n";

        return($addr_str);
    }

    /**
     * Wraps message for use with mailers that do not
     * automatically perform wrapping and for quoted-printable.
     * Original written by philippe.  Returns string.
     * @private
     * @returns string
     */
    function wordwrap($message, $length, $qp_mode = false) {
        if ($qp_mode)
        $soft_break = " =\n";
        else
        $soft_break = "\n";

        $message = $this->fix_eol($message);
        if (substr($message, -1) == "\n")
        $message = substr($message, 0, -1);

        $line = explode("\n", $message);
        $message = "";
        for ($i=0 ;$i < count($line); $i++)
        {
          $line_part = explode(" ", $line[$i]);
          $buf = "";
          for ($e = 0; $e<count($line_part); $e++)
          {
              $word = $line_part[$e];
              if ($qp_mode and (strlen($word) > $length))
              {
                $space_left = $length - strlen($buf) - 1;
                if ($e != 0)
                {
                    if ($space_left > 20)
                    {
                        $len = $space_left;
                        if (substr($word, $len - 1, 1) == "=")
                          $len--;
                        elseif (substr($word, $len - 2, 1) == "=")
                          $len -= 2;
                        $part = substr($word, 0, $len);
                        $word = substr($word, $len);
                        $buf .= " " . $part;
                        $message .= $buf . "=\n";
                    }
                    else
                    {
                        $message .= $buf . $soft_break;
                    }
                    $buf = "";
                }
                while (strlen($word) > 0)
                {
                    $len = $length;
                    if (substr($word, $len - 1, 1) == "=")
                        $len--;
                    elseif (substr($word, $len - 2, 1) == "=")
                        $len -= 2;
                    $part = substr($word, 0, $len);
                    $word = substr($word, $len);

                    if (strlen($word) > 0)
                        $message .= $part . "=\n";
                    else
                        $buf = $part;
                }
              }
              else
              {
                $buf_o = $buf;
                if ($e == 0)
                    $buf .= $word;
                else
                    $buf .= " " . $word;
                if (strlen($buf) > $length and $buf_o != "")
                {
                    $message .= $buf_o . $soft_break;
                    $buf = $word;
                }
              }
          }
          $message .= $buf . "\n";
        }

        return ($message);
    }

    /**
     * Assembles message header.  Returns a string if successful
     * or false if unsuccessful.
     * @private
     * @returns string
     */
    function create_header() {
        $header = array();
        $header[] = $this->received();
        $header[] = sprintf("Date: %s\n", $this->rfc_date());

        // To be created automatically by mail()
        if($this->Mailer != "mail")
            $header[] = $this->addr_append("To", $this->to);

        $header[] = sprintf("From: \"%s\" <%s>\n", addslashes($this->FromName), trim($this->From));
        if(count($this->cc) > 0)
            $header[] = $this->addr_append("Cc", $this->cc);

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

        if(count($this->ReplyTo) > 0)
            $header[] = $this->addr_append("Reply-to", $this->ReplyTo);

        // mail() sets the subject itself
        if($this->Mailer != "mail")
            $header[] = sprintf("Subject: %s\n", trim($this->Subject));

        $header[] = sprintf("X-Priority: %d\n", $this->Priority);
        $header[] = sprintf("X-Mailer: phpmailer [version %s]\n", $this->Version);
        $header[] = sprintf("Return-Path: %s\n", trim($this->From));

        // Add custom headers
        for($index = 0; $index < count($this->CustomHeader); $index++)
            $header[] = sprintf("%s\n", $this->CustomHeader[$index]);

        if($this->UseMSMailHeaders)
            $header[] = $this->AddMSMailHeaders();

        $header[] = "MIME-Version: 1.0\n";

        // Add all attachments
        if(count($this->attachment) > 0 || !empty($this->AltBody))
        {
            // Set message boundary
            $this->boundary = "_b" . md5(uniqid(time()));
            // Set message subboundary for multipart/alternative
            $this->subboundary = "_sb" . md5(uniqid(time()));

            $header[] = "Content-Type: Multipart/Mixed;\n";
            $header[] = sprintf("\tboundary=\"Boundary-=%s\"\n\n", $this->boundary);
        }
        else
        {
            $header[] = sprintf("Content-Transfer-Encoding: %s\n", $this->Encoding);
            $header[] = sprintf("Content-Type: %s; charset = \"%s\"",
                                $this->ContentType, $this->CharSet);
            // No additional lines when using mail() function
            if($this->Mailer != "mail")
                $header[] = "\n\n";
        }

        return(join("", $header));
    }

    /**
     * Assembles the message body.  Returns a string if successful
     * or false if unsuccessful.
     * @private
     * @returns string
     */
    function create_body() {
        // wordwrap the message body if set
        if($this->WordWrap)
            $this->Body = $this->wordwrap($this->Body, $this->WordWrap);

        // If content type is multipart/alternative set body like this:
        if ((!empty($this->AltBody)) && (count($this->attachment) < 1))
        {
            // Return text of body
            $mime = array();
            $mime[] = "This is a MIME message. If you are reading this text, you\n";
            $mime[] = "might want to consider changing to a mail reader that\n";
            $mime[] = "understands how to properly display MIME multipart messages.\n\n";
            $mime[] = sprintf("--Boundary-=%s\n", $this->boundary);

            // Insert body. If multipart/alternative, insert both html and plain
            $mime[] = sprintf("Content-Type: %s; charset = \"%s\";\n" .
                              "\tboundary=\"Boundary-=%s\";\n\n",
                               $this->ContentType, $this->CharSet, $this->subboundary);

            $mime[] = sprintf("--Boundary-=%s\n", $this->subboundary);
            $mime[] = sprintf("Content-Type: text/plain; charset = \"%s\";\n", $this->CharSet);
            $mime[] = sprintf("Content-Transfer-Encoding: %s\n\n", $this->Encoding);
            $mime[] = sprintf("%s\n\n", $this->AltBody);

            $mime[] = sprintf("--Boundary-=%s\n", $this->subboundary);
            $mime[] = sprintf("Content-Type: text/html; charset = \"%s\";\n", $this->CharSet);
            $mime[] = sprintf("Content-Transfer-Encoding: %s\n\n", $this->Encoding);
            $mime[] = sprintf("%s\n\n", $this->Body);

            $mime[] = sprintf("\n--Boundary-=%s--\n\n", $this->subboundary);

            $mime[] = sprintf("\n--Boundary-=%s--\n", $this->boundary);

            $this->Body = $this->encode_string(join("", $mime), $this->Encoding);
        }
        else
        {
            $this->Body = $this->encode_string($this->Body, $this->Encoding);
        }


        if(count($this->attachment) > 0)
        {
            if(!$body = $this->attach_all())
                return false;
        }
        else
            $body = $this->Body;

        return($body);
    }


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

    /**
     * Adds an attachment from a path on the filesystem.
     * Checks if attachment is valid and then adds
     * the attachment to the list.
     * Returns false if the file could not be found
     * or accessed.
     * @public
     * @returns bool
     */
    function AddAttachment($path, $name = "", $encoding = "base64", $type = "application/octet-stream") {
        if(!@is_file($path))
        {
            $this->error_handler(sprintf("Could not access [%s] file", $path));
            return false;
        }

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

        // Append to $attachment array
        $cur = count($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

        return true;
    }

    /**
     * Attaches all fs, string, and binary attachments to the message.
     * Returns a string if successful or false if unsuccessful.
     * @private
     * @returns string
     */
    function attach_all() {
        // Return text of body
        $mime = array();
        $mime[] = "This is a MIME message. If you are reading this text, you\n";
        $mime[] = "might want to consider changing to a mail reader that\n";
        $mime[] = "understands how to properly display MIME multipart messages.\n\n";
        $mime[] = sprintf("--Boundary-=%s\n", $this->boundary);

        // Insert body. If multipart/alternative, insert both html and plain.
        if (!empty($this->AltBody))
        {
            $mime[] = sprintf("Content-Type: %s; charset = \"%s\";\n" .
                              "\tboundary=\"Boundary-=%s\";\n\n",
                               $this->ContentType, $this->CharSet, $this->subboundary);

            $mime[] = sprintf("--Boundary-=%s\n", $this->subboundary);
            $mime[] = sprintf("Content-Type: text/plain; charset = \"%s\";\n", $this->CharSet);
            $mime[] = sprintf("Content-Transfer-Encoding: %s\n\n", $this->Encoding);
            $mime[] = sprintf("%s\n\n", $this->AltBody);

            $mime[] = sprintf("--Boundary-=%s\n", $this->subboundary);
            $mime[] = sprintf("Content-Type: text/html; charset = \"%s\";\n", $this->CharSet);
            $mime[] = sprintf("Content-Transfer-Encoding: %s\n\n", $this->Encoding);
            $mime[] = sprintf("%s\n\n", $this->Body);

            $mime[] = sprintf("\n--Boundary-=%s--\n\n", $this->subboundary);
        }
        else
        {
           $mime[] = sprintf("Content-Type: %s; charset = \"%s\";\n", $this->ContentType, $this->CharSet);
           $mime[] = sprintf("Content-Transfer-Encoding: %s\n\n", $this->Encoding);
           $mime[] = sprintf("%s\n", $this->Body);
        }

        // Add all attachments
        for($i = 0; $i < count($this->attachment); $i++)
        {
          // Check for string attachment
          $isString = $this->attachment[$i][5];
          if ($isString)
          {
              $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];
          $mime[] = sprintf("--Boundary-=%s\n", $this->boundary);
          $mime[] = sprintf("Content-Type: %s; ", $type);
          $mime[] = sprintf("name=\"%s\"\n", $name);
          $mime[] = sprintf("Content-Transfer-Encoding: %s\n", $encoding);
          $mime[] = sprintf("Content-Disposition: attachment; filename=\"%s\"\n\n", $name);

          // Encode as string attachment
          if($isString)
          {
              if(!$mime[] = sprintf("%s\n\n", $this->encode_string($string, $encoding)))
                return false;
          }
          else
          {
              if(!$mime[] = sprintf("%s\n\n", $this->encode_file($path, $encoding)))
                return false;
          }
        }
        $mime[] = sprintf("\n--Boundary-=%s--\n", $this->boundary);

        return(join("", $mime));
    }

    /**
     * Encodes attachment in requested format.  Returns a
     * string if successful or false if unsuccessful.
     * @private
     * @returns string
     */
    function encode_file ($path, $encoding = "base64") {
        if(!@$fd = fopen($path, "rb"))
        {
            $this->error_handler(sprintf("File Error: Could not open file %s", $path));
            return false;
        }
        $file = fread($fd, filesize($path));
        $encoded = $this->encode_string($file, $encoding);
        fclose($fd);

        return($encoded);
    }

    /**
     * Encodes string to requested format. Returns a
     * string if successful or false if unsuccessful.
     * @private
     * @returns string
     */
    function encode_string ($str, $encoding = "base64") {
        switch(strtolower($encoding)) {
          case "base64":
              // chunk_split is found in PHP >= 3.0.6
              $encoded = chunk_split(base64_encode($str));
              break;

          case "7bit":
          case "8bit":
              $encoded = $this->fix_eol($str);
              if (substr($encoded, -2) != "\n")
                $encoded .= "\n";
              break;

          case "binary":
              $encoded = $str;
              break;

          case "quoted-printable":
              $encoded = $this->encode_qp($str);
              break;

          default:
              $this->error_handler(sprintf("Unknown encoding: %s", $encoding));
              return false;
        }
        return($encoded);
    }

    /**
     * Encode string to quoted-printable.  Returns a string.
     * @private
     * @returns string
     */
    function encode_qp ($str) {
        $encoded = $this->fix_eol($str);
        if (substr($encoded, -2) != "\n")
            $encoded .= "\n";

        // Replace every high ascii, control and = characters
        $encoded = preg_replace("/([\001-\010\013\014\016-\037\075\177-\377])/e",
                  "'='.sprintf('%02X', ord('\\1'))", $encoded);
        // Replace every spaces and tabs when it's the last character on a line
        $encoded = preg_replace("/([\011\040])\n/e",
                  "'='.sprintf('%02X', ord('\\1')).'\n'", $encoded);

        // Maximum line length of 76 characters before CRLF (74 + space + '=')
        $encoded = $this->WordWrap($encoded, 74, true);

        return $encoded;
    }

    /**
    * Adds a string or binary attachment (non-filesystem) to the list.
    * This method can be used to attach ascii or binary data,
    * such as a BLOB record from a database.
    * @public
    * @returns void
    */
    function AddStringAttachment($string, $filename, $encoding = "base64", $type = "application/octet-stream") {
        // Append to $attachment array
        $cur = count($this->attachment);
        $this->attachment[$cur][0] = $string;
        $this->attachment[$cur][1] = $filename;
        $this->attachment[$cur][2] = $filename;
        $this->attachment[$cur][3] = $encoding;
        $this->attachment[$cur][4] = $type;
        $this->attachment[$cur][5] = true; // isString
    }

    /////////////////////////////////////////////////
    // MESSAGE RESET METHODS
    /////////////////////////////////////////////////

    /**
     * Clears all recipients assigned in the TO array.  Returns void.
     * @public
     * @returns void
     */
    function ClearAddresses() {
        $this->to = array();
    }

    /**
     * Clears all recipients assigned in the CC array.  Returns void.
     * @public
     * @returns void
     */
    function ClearCCs() {
        $this->cc = array();
    }

    /**
     * Clears all recipients assigned in the BCC array.  Returns void.
     * @public
     * @returns void
     */
    function ClearBCCs() {
        $this->bcc = array();
    }

    /**
     * Clears all recipients assigned in the ReplyTo array.  Returns void.
     * @public
     * @returns void
     */
    function ClearReplyTos() {
        $this->ReplyTo = array();
    }

    /**
     * Clears all recipients assigned in the TO, CC and BCC
     * array.  Returns void.
     * @public
     * @returns void
     */
    function ClearAllRecipients() {
        $this->to = array();
        $this->cc = array();
        $this->bcc = array();
    }

    /**
     * Clears all previously set filesystem, string, and binary
     * attachments.  Returns void.
     * @public
     * @returns void
     */
    function ClearAttachments() {
        $this->attachment = array();
    }

    /**
     * Clears all custom headers.  Returns void.
     * @public
     * @returns void
     */
    function ClearCustomHeaders() {
        $this->CustomHeader = array();
    }


    /////////////////////////////////////////////////
    // MISCELLANEOUS METHODS
    /////////////////////////////////////////////////

    /**
     * Adds the error message to the error container.
     * Returns void.
     * @private
     * @returns void
     */
    function error_handler($msg) {
        $this->ErrorInfo = $msg;
    }

    /**
     * Returns the proper RFC 822 formatted date. Returns string.
     * @private
     * @returns string
     */
    function rfc_date() {
        $tz = date("Z");
        $tzs = ($tz < 0) ? "-" : "+";
        $tz = abs($tz);
        $tz = ($tz/3600)*100 + ($tz%3600)/60;
        $date = sprintf("%s %s%04d", date("D, j M Y H:i:s"), $tzs, $tz);
        return $date;
    }

    /**
     * Returns received header for message tracing. Returns string.
     * @private
     * @returns string
     */
    function received() {
        global $HTTP_SERVER_VARS;
        global $HTTP_ENV_VARS;

        // IIS & Apache use different global variables
        if($HTTP_SERVER_VARS["REMOTE_ADDR"] == "")
            $http_vars = $HTTP_ENV_VARS; // Apache found
        else
            $http_vars = $HTTP_SERVER_VARS; // IIS found

        $str = sprintf("Received: from phpmailer ([%s]) by %s " .
               "with HTTP (%s);\n\t %s\n",
               $http_vars["REMOTE_ADDR"],
               $http_vars["SERVER_NAME"],
               $http_vars["SERVER_SOFTWARE"],
               $this->rfc_date());

        return $str;
    }

    /**
     * Changes every end of line from CR or LF to CRLF.  Returns string.
     * @private
     * @returns string
     */
    function fix_eol($str) {
        $str = str_replace("\n", "\n", $str);
        $str = str_replace("\r", "\n", $str);
        $str = str_replace("\n", "\n", $str);
        return $str;
    }

    /**
     * Adds a custom header.  Returns void.
     * @public
     * @returns void
     */
    function AddCustomHeader($custom_header) {
        $this->CustomHeader[] = $custom_header;
    }

    /**
     * Adds all the Microsoft message headers.  Returns string.
     * @private
     * @returns string
     */
    function AddMSMailHeaders() {
        $MSHeader = "";
        if($this->Priority == 1)
            $MSPriority = "High";
        elseif($this->Priority == 5)
            $MSPriority = "Low";
        else
            $MSPriority = "Medium";

        $MSHeader .= sprintf("X-MSMail-Priority: %s\n", $MSPriority);
        $MSHeader .= sprintf("Importance: %s\n", $MSPriority);

        return($MSHeader);
    }

}
// End of class



Article How to send MIME email in PHP

How to send MIME email in PHP