HTML Mime Email

<?php
/***************************************
** Title.........: HTML Mime Mail class
** Version.......: 1.26
** Author........: Richard Heyes <[email protected]>
** Filename......: html_mime_mail.class
** Last changed..: 25/06/2000
** Notes.........: Based upon mime_mail.class
**                 by Tobias Ratschiller <[email protected]>
**                 and Sascha Schumann <[email protected]>.
**                  - Thanks to Thomas Flemming for supplying a fix
**                    for Win32.
**                  - Made headers terminated by CRLF instead of LF, now
**                    compliant with RFC822. Thanks to Pao-Hsi Huang.
**                  - Fixed bug; certain mail systems (gmx.net in particular)
**                    were rejecting mail because of a space character either
**                    side of the equal sign on the boundary line. Thanks to
**                    Peter Holm for notifying me.
**                  - Fixed bug; $html_images was tested to be an array or not
**                    but was set to be an array during object creation, so the
**                    test always returned true. Thanks to Bob Silva for
**                    notifying me.
**                  - Fixed bug; when looping with $obj->send(), From: headers
**                    were accumulating. Bummer. Thanks to Lance Rasmussen for
**                    notifying me.
**                  - See http://www.heyes-computing.net/scripts/ for a zip/tar
**                    containing an example script.
***************************************/

class html_mime_mail{

        var $headers;
        var $body;
        var $multipart;
        var $mime;
        var $html;
        var $html_text;
        var $html_images = array();
        var $cids = array();
        var $do_html;
        var $parts = array();

/***************************************
** Constructor function. Sets the headers
** if supplied.
***************************************/
        function html_mime_mail($headers = ''){
                $this->headers = $headers;
        }

/***************************************
** Adds a html part to the mail.
** Also replaces image names with
** content-id's.
***************************************/
        function add_html($html, $text){
                $this->do_html = 1;
                $this->html = $html;
                $this->html_text = $text;
                if(is_array($this->html_images) AND count($this->html_images) > 0){
                        for($i=0; $i<count($this->html_images); $i++){
                                $this->html = ereg_replace($this->html_images[$i]['name'], 'cid:'.$this->html_images[$i]['cid'], $this->html);
                        }
                }
        }

/***************************************
** Builds html part of email.
***************************************/
        function build_html($orig_boundary){
                $sec_boundary = '=_'.md5(uniqid(time()));
                $thr_boundary = '=_'.md5(uniqid(time()));

                if(count($this->html_images) == 0){
                        $this->multipart.= '--'.$orig_boundary."rn";
                        $this->multipart.= 'Content-Type: multipart/alternative;'.chr(13).chr(10).chr(9).'boundary="'.$sec_boundary.""rnrnrn";

                        $this->multipart.= '--'.$sec_boundary."rn";
                        $this->multipart.= 'Content-Type: text/plain'."rn";
                        $this->multipart.= 'Content-Transfer-Encoding: base64'."rnrn";
                        $this->multipart.= chunk_split(base64_encode($this->html_text))."rnrn";

                        $this->multipart.= '--'.$sec_boundary."rn";
                        $this->multipart.= 'Content-Type: text/html'."rn";
                        $this->multipart.= 'Content-Transfer-Encoding: base64'."rnrn";
                        $this->multipart.= chunk_split(base64_encode($this->html))."rnrn";
                        $this->multipart.= '--'.$sec_boundary."--rnrn";
                }else{
                        $this->multipart.= '--'.$orig_boundary."rn";
                        $this->multipart.= 'Content-Type: multipart/related;'.chr(13).chr(10).chr(9).'boundary="'.$sec_boundary.""rnrnrn";

                        $this->multipart.= '--'.$sec_boundary."rn";
                        $this->multipart.= 'Content-Type: multipart/alternative;'.chr(13).chr(10).chr(9).'boundary="'.$thr_boundary.""rnrnrn";

                        $this->multipart.= '--'.$thr_boundary."rn";
                        $this->multipart.= 'Content-Type: text/plain'."rn";
                        $this->multipart.= 'Content-Transfer-Encoding: base64'."rnrn";
                        $this->multipart.= chunk_split(base64_encode($this->html_text))."rnrn";

                        $this->multipart.= '--'.$thr_boundary."rn";
                        $this->multipart.= 'Content-Type: text/html'."rn";
                        $this->multipart.= 'Content-Transfer-Encoding: base64'."rnrn";
                        $this->multipart.= chunk_split(base64_encode($this->html))."rnrn";
                        $this->multipart.= '--'.$thr_boundary."--rnrn";

                        for($i=0; $i<count($this->html_images); $i++){
                                $this->multipart.= '--'.$sec_boundary."rn";
                                $this->build_html_image($i);
                        }

                        $this->multipart.= "--".$sec_boundary."--rnrn";
                }
        }
/***************************************
** Adds an image to the list of embedded
** images.
***************************************/
        function add_html_image($file, $name = '', $c_type='application/octet-stream'){
                $this->html_images[] = array( 'body' => $file,
                                              'name' => $name,
                                              'c_type' => $c_type,
                                              'cid' => md5(uniqid(time())) );
        }


/***************************************
** Adds a file to the list of attachments.
***************************************/
        function add_attachment($file, $name = '', $c_type='application/octet-stream'){
                $this->parts[] = array( 'body' => $file,
                                        'name' => $name,
                                        'c_type' => $c_type );
        }

/***************************************
** Builds an embedded image part of an
** html mail.
***************************************/
        function build_html_image($i){
                $this->multipart.= 'Content-Type: '.$this->html_images[$i]['c_type'];

                if($this->html_images[$i]['name'] != '') $this->multipart .= '; name="'.$this->html_images[$i]['name'].""rn";
                else $this->multipart .= "rn";

                $this->multipart.= 'Content-Transfer-Encoding: base64'."rn";
                $this->multipart.= 'Content-ID: <'.$this->html_images[$i]['cid'].">rnrn";
                $this->multipart.= chunk_split(base64_encode($this->html_images[$i]['body']))."rn";
        }

/***************************************
** Builds a single part of a multipart
** message.
***************************************/
        function build_part($i){
                $message_part = '';
                $message_part.= 'Content-Type: '.$this->parts[$i]['c_type'];
                if($this->parts[$i]['name'] != '')
                        $message_part .= '; name="'.$this->parts[$i]['name'].""rn";
                else
                        $message_part .= "rn";

                // Determine content encoding.
                if($this->parts[$i]['c_type'] == 'text/plain'){
                        $message_part.= 'Content-Transfer-Encoding: base64'."rnrn";
                        $message_part.= chunk_split(base64_encode($this->parts[$i]['body']))."rn";
                }else{
                        $message_part.= 'Content-Transfer-Encoding: base64'."rn";
                        $message_part.= 'Content-Disposition: attachment; filename="'.$this->parts[$i]['name'].""rnrn";
                        $message_part.= chunk_split(base64_encode($this->parts[$i]['body']))."rn";
                }

                return $message_part;
        }

/***************************************
** Builds the multipart message from the
** list ($this->parts).
***************************************/
        function build_message(){
                $boundary = '=_'.md5(uniqid(time()));

                $this->headers.= "MIME-Version: 1.0rn";
                $this->headers.= "Content-Type: multipart/mixed;".chr(13).chr(10).chr(9)."boundary="".$boundary.""rn";
                $this->multipart = '';
                $this->multipart.= "This is a MIME encoded message.rnCreated by html_mime_mail.class.rnSee http://www.heyes-computing.net/scripts/ for a copy.rnrn";

                if(isset($this->do_html) AND $this->do_html == 1) $this->build_html($boundary);
                if(isset($this->body) AND $this->body != '') $this->parts[] = array('body' => $this->body, 'name' => '', 'c_type' => 'text/plain');

                for($i=(count($this->parts)-1); $i>=0; $i--){
                        $this->multipart.= '--'.$boundary."rn".$this->build_part($i);
                }

                $this->mime = $this->multipart."--".$boundary."--rn";
        }

/***************************************
** Sends the mail.
***************************************/
        function send($to_name, $to_addr, $from_name, $from_addr, $subject = '', $headers = ''){

                if($to_name != '') $to = '"'.$to_name.'" <'.$to_addr.'>';
                else $to = $to_addr;

                if($from_name != '') $from = '"'.$from_name.'" <'.$from_addr.'>';
                else $from = $from_addr;

                mail($to, $subject, $this->mime, 'From: '.$from."rn".$this->headers);
        }

/***************************************
** Use this method to deliver using direct
** smtp connection. Relies upon Manuel Lemos'
** smtp mail delivery class available at:
** http://phpclasses.upperdesign.com
**
** void smtp_send( string *Name* of smtp object,
**                 string From address,
**                 array  To addresses,
**                 string Subject)
***************************************/
        function smtp_send($smtp_obj, $from_addr, $to_addr, $subject){
                global $$smtp_obj;
                $smtp_obj = $$smtp_obj;

                $this->headers .= 'From: '.$from_addr."rn";
                $this->headers .= 'Subject: '.$subject."rn";

                if(substr($this->headers, -2) == "rn") $this->headers = substr($this->headers,0,-2);
                $this->headers = explode("rn", $this->headers);

                $smtp_obj->sendmessage($from_addr, $to_addr, $this->headers, $this->mime);
        }

} // End of class.
?>