<?php
/**
* o------------------------------------------------------------------------------o
* | This package is licensed under the Phpguru license. A quick summary is |
* | that for commercial use, there is a small one-time licensing fee to pay. For |
* | registered charities and educational institutes there is a reduced license |
* | fee available. You can read more at: |
* | |
* | http://www.phpguru.org/static/license.html |
* o------------------------------------------------------------------------------o
*
* © Copyright 2008,2009 Richard Heyes
*/
/**
*
* Raw mime encoding class
*
* What is it?
* This class enables you to manipulate and build
* a mime email from the ground up.
*
* Why use this instead of mime.php?
* mime.php is a userfriendly api to this class for
* people who aren't interested in the internals of
* mime mail. This class however allows full control
* over the email.
*
* Eg.
*
* // Since multipart/mixed has no real body, (the body is
* // the subpart), we set the body argument to blank.
*
* $params['content_type'] = 'multipart/mixed';
* $email = new Mail_mimePart('', $params);
*
* // Here we add a text part to the multipart we have
* // already. Assume $body contains plain text.
*
* $params['content_type'] = 'text/plain';
* $params['encoding'] = '7bit';
* $text = $email->addSubPart($body, $params);
*
* // Now add an attachment. Assume $attach is
* the contents of the attachment
*
* $params['content_type'] = 'application/zip';
* $params['encoding'] = 'base64';
* $params['disposition'] = 'attachment';
* $params['dfilename'] = 'example.zip';
* $attach =& $email->addSubPart($body, $params);
*
* // Now build the email. Note that the encode
* // function returns an associative array containing two
* // elements, body and headers. You will need to add extra
* // headers, (eg. Mime-Version) before sending.
*
* $email = $message->encode();
* $email['headers'][] = 'Mime-Version: 1.0';
*
*
* Further examples are available at http://www.phpguru.org
*
* TODO:
* - Set encode() to return the $obj->encoded if encode()
* has already been run. Unless a flag is passed to specifically
* re-build the message.
*
* @author Richard Heyes <richard@phpguru.org>
* @version $Revision: 1.3 $
* @package Mail
*/
class Mail_MIMEPart
{
/**
* The encoding type of this part
* @var string
*/
private $encoding;
/**
* An array of subparts
* @var array
*/
private $subparts;
/**
* The output of this part after being built
* @var string
*/
private $encoded;
/**
* Headers for this part
* @var array
*/
private $headers;
/**
* The body of this part (not encoded)
* @var string
*/
private $body;
/**
* Constructor.
*
* Sets up the object.
*
* @param $body - The body of the mime part if any.
* @param $params - An associative array of parameters:
* content_type - The content type for this part eg multipart/mixed
* encoding - The encoding to use, 7bit, 8bit, base64, or quoted-printable
* cid - Content ID to apply
* disposition - Content disposition, inline or attachment
* dfilename - Optional filename parameter for content disposition
* description - Content description
* charset - Character set to use
* @access public
*/
public function __construct($body = '', $params = array())
{
if (!defined('MAIL_MIMEPART_CRLF')) {
define('MAIL_MIMEPART_CRLF', defined('MAIL_MIME_CRLF') ? MAIL_MIME_CRLF : "\r\n", true);
}
foreach ($params as $key => $value) {
switch ($key) {
case 'content_type':
$headers['Content-Type'] = $value . (isset($charset) ? '; charset="' . $charset . '"' : '');
break;
case 'encoding':
$this->encoding = $value;
$headers['Content-Transfer-Encoding'] = $value;
break;
case 'cid':
$headers['Content-ID'] = '<' . $value . '>';
break;
case 'disposition':
$headers['Content-Disposition'] = $value . (isset($dfilename) ? '; filename="' . $dfilename . '"' : '');
break;
case 'dfilename':
if (isset($headers['Content-Disposition'])) {
$headers['Content-Disposition'] .= '; filename="' . $value . '"';
} else {
$dfilename = $value;
}
break;
case 'description':
$headers['Content-Description'] = $value;
break;
case 'charset':
if (isset($headers['Content-Type'])) {
$headers['Content-Type'] .= '; charset="' . $value . '"';
} else {
$charset = $value;
}
break;
}
}
// Default content-type
if (!isset($headers['Content-Type'])) {
$headers['Content-Type'] = 'text/plain';
}
// Default encoding
if (!isset($this->encoding)) {
$this->encoding = '7bit';
}
// Assign stuff to member variables
$this->encoded = array();
$this->headers = $headers;
$this->body = $body;
}
/**
* Encodes and returns the email. Also stores
* it in the encoded member variable
*
* @return An associative array containing two elements,
* body and headers. The headers element is itself
* an indexed array.
*/
public function encode()
{
$encoded =& $this->encoded;
if (!empty($this->subparts)) {
srand((double)microtime()*1000000);
$boundary = '=_' . md5(uniqid(rand()) . microtime());
$this->headers['Content-Type'] .= ';' . MAIL_MIMEPART_CRLF . "\t" . 'boundary="' . $boundary . '"';
// Add body parts to $subparts
for ($i = 0; $i < count($this->subparts); $i++) {
$headers = array();
$tmp = $this->subparts[$i]->encode();
foreach ($tmp['headers'] as $key => $value) {
$headers[] = $key . ': ' . $value;
}
$subparts[] = implode(MAIL_MIMEPART_CRLF, $headers) . MAIL_MIMEPART_CRLF . MAIL_MIMEPART_CRLF . $tmp['body'];
}
$encoded['body'] = '--' . $boundary . MAIL_MIMEPART_CRLF .
implode('--' . $boundary . MAIL_MIMEPART_CRLF, $subparts) .
'--' . $boundary.'--' . MAIL_MIMEPART_CRLF;
} else {
$encoded['body'] = $this->getEncodedData($this->body, $this->encoding) . MAIL_MIMEPART_CRLF;
}
// Add headers to $encoded
$encoded['headers'] =& $this->headers;
return $encoded;
}
/**
* Adds a subpart to current mime part and returns
* a reference to it
*
* @param $body The body of the subpart, if any.
* @param $params The parameters for the subpart, same
* as the $params argument for constructor.
* @return A reference to the part you just added.
*/
public function addSubPart($body, $params)
{
$this->subparts[] = new Mail_MIMEPart($body, $params);
return $this->subparts[count($this->subparts) - 1];
}
/**
* Returns encoded data based upon encoding passed to it
*
* @param $data The data to encode.
* @param $encoding The encoding type to use, 7bit, base64,
* or quoted-printable.
*/
private function getEncodedData($data, $encoding)
{
switch ($encoding) {
case '8bit':
case '7bit':
return $data;
break;
case 'quoted-printable':
return $this->quotedPrintableEncode($data);
break;
case 'base64':
return rtrim(chunk_split(base64_encode($data), 76, MAIL_MIMEPART_CRLF));
break;
default:
return $data;
}
}
/**
* Encodes data to quoted-printable standard.
*
* @param $input The data to encode
* @param $line_max Optional max line length. Should
* not be more than 76 chars
*/
private function quotedPrintableEncode($input , $line_max = 76)
{
$lines = preg_split("/\r?\n/", $input);
$eol = MAIL_MIMEPART_CRLF;
$escape = '=';
$output = '';
while(list(, $line) = each($lines)){
$linlen = strlen($line);
$newline = '';
for ($i = 0; $i < $linlen; $i++) {
$char = substr($line, $i, 1);
$dec = ord($char);
if (($dec == 32) AND ($i == ($linlen - 1))){ // convert space at eol only
$char = '=20';
} elseif($dec == 9) {
; // Do nothing if a tab.
} elseif(($dec == 61) OR ($dec < 32 ) OR ($dec > 126)) {
$char = $escape . strtoupper(sprintf('%02s', dechex($dec)));
}
if ((strlen($newline) + strlen($char)) >= $line_max) { // MAIL_MIMEPART_CRLF is not counted
$output .= $newline . $escape . $eol; // soft line break; " =\r\n" is okay
$newline = '';
}
$newline .= $char;
} // end of for
$output .= $newline . $eol;
}
$output = substr($output, 0, -1 * strlen($eol)); // Don't want last crlf
return $output;
}
} // End of class
?>