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<?php
/**
* The Mail_Mime class is used to create MIME E-mail messages
*
* The Mail_Mime class provides an OO interface to create MIME
* enabled email messages. This way you can create emails that
* contain plain-text bodies, HTML bodies, attachments, inline
* images and specific headers.
*
* Compatible with PHP versions 4 and 5
*
* LICENSE: This LICENSE is in the BSD license style.
* Copyright (c) 2002-2003, Richard Heyes <richard@phpguru.org>
* Copyright (c) 2003-2006, PEAR <pear-group@php.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the authors, nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* @category Mail
* @package Mail_Mime
* @author Richard Heyes <richard@phpguru.org>
* @author Tomas V.V. Cox <cox@idecnet.com>
* @author Cipriano Groenendal <cipri@php.net>
* @author Sean Coates <sean@php.net>
* @copyright 2003-2006 PEAR <pear-group@php.net>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version CVS: $Id: mime.php 514 2007-03-21 09:54:10Z thomasb $
* @link http://pear.php.net/package/Mail_mime
* @notes This class is based on HTML Mime Mail class from
* Richard Heyes <richard@phpguru.org> which was based also
* in the mime_mail.class by Tobias Ratschiller <tobias@dnet.it>
* and Sascha Schumann <sascha@schumann.cx>
*/
/**
* require PEAR
*
* This package depends on PEAR to raise errors.
*/
require_once('PEAR.php');
/**
* require Mail_mimePart
*
* Mail_mimePart contains the code required to
* create all the different parts a mail can
* consist of.
*/
require_once('Mail/mimePart.php');
/**
* The Mail_Mime class provides an OO interface to create MIME
* enabled email messages. This way you can create emails that
* contain plain-text bodies, HTML bodies, attachments, inline
* images and specific headers.
*
* @category Mail
* @package Mail_Mime
* @author Richard Heyes <richard@phpguru.org>
* @author Tomas V.V. Cox <cox@idecnet.com>
* @author Cipriano Groenendal <cipri@php.net>
* @author Sean Coates <sean@php.net>
* @copyright 2003-2006 PEAR <pear-group@php.net>
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version Release: @package_version@
* @link http://pear.php.net/package/Mail_mime
*/
class Mail_mime
{
/**
* Contains the plain text part of the email
*
* @var string
* @access private
*/
var $_txtbody;
/**
* Contains the html part of the email
*
* @var string
* @access private
*/
var $_htmlbody;
/**
* contains the mime encoded text
*
* @var string
* @access private
*/
var $_mime;
/**
* contains the multipart content
*
* @var string
* @access private
*/
var $_multipart;
/**
* list of the attached images
*
* @var array
* @access private
*/
var $_html_images = array();
/**
* list of the attachements
*
* @var array
* @access private
*/
var $_parts = array();
/**
* Build parameters
*
* @var array
* @access private
*/
var $_build_params = array();
/**
* Headers for the mail
*
* @var array
* @access private
*/
var $_headers = array();
/**
* End Of Line sequence (for serialize)
*
* @var string
* @access private
*/
var $_eol;
/**
* Constructor function.
*
* @param string $crlf what type of linebreak to use.
* Defaults to "\r\n"
* @return void
*
* @access public
*/
function Mail_mime($crlf = "\r\n")
{
$this->_setEOL($crlf);
$this->_build_params = array(
'head_encoding' => 'quoted-printable',
'text_encoding' => '7bit',
'html_encoding' => 'quoted-printable',
'7bit_wrap' => 998,
'html_charset' => 'ISO-8859-1',
'text_charset' => 'ISO-8859-1',
'head_charset' => 'ISO-8859-1'
);
}
/**
* wakeup function called by unserialize. It re-sets the EOL constant
*
* @access private
*/
function __wakeup()
{
$this->_setEOL($this->_eol);
}
/**
* Accessor function to set the body text. Body text is used if
* it's not an html mail being sent or else is used to fill the
* text/plain part that emails clients who don't support
* html should show.
*
* @param string $data Either a string or
* the file name with the contents
* @param bool $isfile If true the first param should be treated
* as a file name, else as a string (default)
* @param bool $append If true the text or file is appended to
* the existing body, else the old body is
* overwritten
* @return mixed true on success or PEAR_Error object
* @access public
*/
function setTXTBody($data, $isfile = false, $append = false)
{
if (!$isfile) {
if (!$append) {
$this->_txtbody = $data;
} else {
$this->_txtbody .= $data;
}
} else {
$cont = $this->_file2str($data);
if (PEAR::isError($cont)) {
return $cont;
}
if (!$append) {
$this->_txtbody = $cont;
} else {
$this->_txtbody .= $cont;
}
}
return true;
}
/**
* Adds a html part to the mail.
*
* @param string $data either a string or the file name with the
* contents
* @param bool $isfile a flag that determines whether $data is a
* filename, or a string(false, default)
* @return bool true on success
* @access public
*/
function setHTMLBody($data, $isfile = false)
{
if (!$isfile) {
$this->_htmlbody = $data;
} else {
$cont = $this->_file2str($data);
if (PEAR::isError($cont)) {
return $cont;
}
$this->_htmlbody = $cont;
}
return true;
}
/**
* Adds an image to the list of embedded images.
*
* @param string $file the image file name OR image data itself
* @param string $c_type the content type
* @param string $name the filename of the image.
* Only use if $file is the image data.
* @param bool $isfile whether $file is a filename or not.
* Defaults to true
* @return bool true on success
* @access public
*/
function addHTMLImage($file, $c_type='application/octet-stream',
$name = '', $isfile = true)
{
$filedata = ($isfile === true) ? $this->_file2str($file)
: $file;
if ($isfile === true) {
$filename = ($name == '' ? $file : $name);
} else {
$filename = $name;
}
if (PEAR::isError($filedata)) {
return $filedata;
}
$this->_html_images[] = array(
'body' => $filedata,
'name' => $filename,
'c_type' => $c_type,
'cid' => md5(uniqid(time()))
);
return true;
}
/**
* Adds a file to the list of attachments.
*
* @param string $file The file name of the file to attach
* OR the file contents itself
* @param string $c_type The content type
* @param string $name The filename of the attachment
* Only use if $file is the contents
* @param bool $isfile Whether $file is a filename or not
* Defaults to true
* @param string $encoding The type of encoding to use.
* Defaults to base64.
* Possible values: 7bit, 8bit, base64,
* or quoted-printable.
* @param string $disposition The content-disposition of this file
* Defaults to attachment.
* Possible values: attachment, inline.
* @param string $charset The character set used in the filename
* of this attachment.
* @return mixed true on success or PEAR_Error object
* @access public
*/
function addAttachment($file, $c_type = 'application/octet-stream',
$name = '', $isfile = true,
$encoding = 'base64',
$disposition = 'attachment', $charset = '')
{
$filedata = ($isfile === true) ? $this->_file2str($file)
: $file;
if ($isfile === true) {
// Force the name the user supplied, otherwise use $file
$filename = (!empty($name)) ? $name : $file;
} else {
$filename = $name;
}
if (empty($filename)) {
$err = PEAR::raiseError(
"The supplied filename for the attachment can't be empty"
);
return $err;
}
$filename = basename($filename);
if (PEAR::isError($filedata)) {
return $filedata;
}
$this->_parts[] = array(
'body' => $filedata,
'name' => $filename,
'c_type' => $c_type,
'encoding' => $encoding,
'charset' => $charset,
'disposition' => $disposition
);
return true;
}
/**
* Get the contents of the given file name as string
*
* @param string $file_name path of file to process
* @return string contents of $file_name
* @access private
*/
function &_file2str($file_name)
{
if (!is_readable($file_name)) {
$err = PEAR::raiseError('File is not readable ' . $file_name);
return $err;
}
if (!$fd = fopen($file_name, 'rb')) {
$err = PEAR::raiseError('Could not open ' . $file_name);
return $err;
}
$filesize = filesize($file_name);
if ($filesize == 0){
$cont = "";
}else{
if ($magic_quote_setting = get_magic_quotes_runtime()){
set_magic_quotes_runtime(0);
}
$cont = fread($fd, $filesize);
if ($magic_quote_setting){
set_magic_quotes_runtime($magic_quote_setting);
}
}
fclose($fd);
return $cont;
}
/**
* Adds a text subpart to the mimePart object and
* returns it during the build process.
*
* @param mixed The object to add the part to, or
* null if a new object is to be created.
* @param string The text to add.
* @return object The text mimePart object
* @access private
*/
function &_addTextPart(&$obj, $text)
{
$params['content_type'] = 'text/plain';
$params['encoding'] = $this->_build_params['text_encoding'];
$params['charset'] = $this->_build_params['text_charset'];
if (is_object($obj)) {
$ret = $obj->addSubpart($text, $params);
return $ret;
} else {
$ret = new Mail_mimePart($text, $params);
return $ret;
}
}
/**
* Adds a html subpart to the mimePart object and
* returns it during the build process.
*
* @param mixed The object to add the part to, or
* null if a new object is to be created.
* @return object The html mimePart object
* @access private
*/
function &_addHtmlPart(&$obj)
{
$params['content_type'] = 'text/html';
$params['encoding'] = $this->_build_params['html_encoding'];
$params['charset'] = $this->_build_params['html_charset'];
if (is_object($obj)) {
$ret = $obj->addSubpart($this->_htmlbody, $params);
return $ret;
} else {
$ret = new Mail_mimePart($this->_htmlbody, $params);
return $ret;
}
}
/**
* Creates a new mimePart object, using multipart/mixed as
* the initial content-type and returns it during the
* build process.
*
* @return object The multipart/mixed mimePart object
* @access private
*/
function &_addMixedPart()
{
$params['content_type'] = 'multipart/mixed';
$ret = new Mail_mimePart('', $params);
return $ret;
}
/**
* Adds a multipart/alternative part to a mimePart
* object (or creates one), and returns it during
* the build process.
*
* @param mixed The object to add the part to, or
* null if a new object is to be created.
* @return object The multipart/mixed mimePart object
* @access private
*/
function &_addAlternativePart(&$obj)
{
$params['content_type'] = 'multipart/alternative';
if (is_object($obj)) {
return $obj->addSubpart('', $params);
} else {
$ret = new Mail_mimePart('', $params);
return $ret;
}
}
/**
* Adds a multipart/related part to a mimePart
* object (or creates one), and returns it during
* the build process.
*
* @param mixed The object to add the part to, or
* null if a new object is to be created
* @return object The multipart/mixed mimePart object
* @access private
*/
function &_addRelatedPart(&$obj)
{
$params['content_type'] = 'multipart/related';
if (is_object($obj)) {
return $obj->addSubpart('', $params);
} else {
$ret = new Mail_mimePart('', $params);
return $ret;
}
}
/**
* Adds an html image subpart to a mimePart object
* and returns it during the build process.
*
* @param object The mimePart to add the image to
* @param array The image information
* @return object The image mimePart object
* @access private
*/
function &_addHtmlImagePart(&$obj, $value)
{
$params['content_type'] = $value['c_type'] . '; ' .
'name="' . $value['name'] . '"';
$params['encoding'] = 'base64';
$params['disposition'] = 'inline';
$params['dfilename'] = $value['name'];
$params['cid'] = $value['cid'];
$ret = $obj->addSubpart($value['body'], $params);
return $ret;
}
/**
* Adds an attachment subpart to a mimePart object
* and returns it during the build process.
*
* @param object The mimePart to add the image to
* @param array The attachment information
* @return object The image mimePart object
* @access private
*/
function &_addAttachmentPart(&$obj, $value)
{
$params['dfilename'] = $value['name'];
$params['encoding'] = $value['encoding'];
if ($value['disposition'] != "inline") {
$fname = array("fname" => $value['name']);
$fname_enc = $this->_encodeHeaders($fname, array('head_charset' => $value['charset'] ? $value['charset'] : 'iso-8859-1'));
$params['dfilename'] = $fname_enc['fname'];
}
if ($value['charset']) {
$params['charset'] = $value['charset'];
}
$params['content_type'] = $value['c_type'] . '; ' .
'name="' . $params['dfilename'] . '"';
$params['disposition'] = isset($value['disposition']) ?
$value['disposition'] : 'attachment';
$ret = $obj->addSubpart($value['body'], $params);
return $ret;
}
/**
* Returns the complete e-mail, ready to send using an alternative
* mail delivery method. Note that only the mailpart that is made
* with Mail_Mime is created. This means that,
* YOU WILL HAVE NO TO: HEADERS UNLESS YOU SET IT YOURSELF
* using the $xtra_headers parameter!
*
* @param string $separation The separation etween these two parts.
* @param array $build_params The Build parameters passed to the
* &get() function. See &get for more info.
* @param array $xtra_headers The extra headers that should be passed
* to the &headers() function.
* See that function for more info.
* @param bool $overwrite Overwrite the existing headers with new.
* @return string The complete e-mail.
* @access public
*/
function getMessage($separation = null, $build_params = null, $xtra_headers = null, $overwrite = false)
{
if ($separation === null)
{
$separation = MAIL_MIME_CRLF;
}
$body = $this->get($build_params);
$head = $this->txtHeaders($xtra_headers, $overwrite);
$mail = $head . $separation . $body;
return $mail;
}
/**
* Builds the multipart message from the list ($this->_parts) and
* returns the mime content.
*
* @param array Build parameters that change the way the email
* is built. Should be associative. Can contain:
* head_encoding - What encoding to use for the headers.
* Options: quoted-printable or base64
* Default is quoted-printable
* text_encoding - What encoding to use for plain text
* Options: 7bit, 8bit, base64, or quoted-printable
* Default is 7bit
* html_encoding - What encoding to use for html
* Options: 7bit, 8bit, base64, or quoted-printable
* Default is quoted-printable
* 7bit_wrap - Number of characters before text is
* wrapped in 7bit encoding
* Default is 998
* html_charset - The character set to use for html.
* Default is iso-8859-1
* text_charset - The character set to use for text.
* Default is iso-8859-1
* head_charset - The character set to use for headers.
* Default is iso-8859-1
* @return string The mime content
* @access public
*/
function &get($build_params = null)
{
if (isset($build_params)) {
while (list($key, $value) = each($build_params)) {
$this->_build_params[$key] = $value;
}
}
if (!empty($this->_html_images) AND isset($this->_htmlbody)) {
foreach ($this->_html_images as $key => $value) {
$regex = array();
$regex[] = '#(\s)((?i)src|background|href(?-i))\s*=\s*(["\']?)' .
preg_quote($value['name'], '#') . '\3#';
$regex[] = '#(?i)url(?-i)\(\s*(["\']?)' .
preg_quote($value['name'], '#') . '\1\s*\)#';
$rep = array();
$rep[] = '\1\2=\3cid:' . $value['cid'] .'\3';
$rep[] = 'url(\1cid:' . $value['cid'] . '\2)';
$this->_htmlbody = preg_replace($regex, $rep,
$this->_htmlbody
);
$this->_html_images[$key]['name'] = basename($this->_html_images[$key]['name']);
}
}
$null = null;
$attachments = !empty($this->_parts) ? true : false;
$html_images = !empty($this->_html_images) ? true : false;
$html = !empty($this->_htmlbody) ? true : false;
$text = (!$html AND !empty($this->_txtbody)) ? true : false;
switch (true) {
case $text AND !$attachments:
$message =& $this->_addTextPart($null, $this->_txtbody);
break;
case !$text AND !$html AND $attachments:
$message =& $this->_addMixedPart();
for ($i = 0; $i < count($this->_parts); $i++) {
$this->_addAttachmentPart($message, $this->_parts[$i]);
}
break;
case $text AND $attachments:
$message =& $this->_addMixedPart();
$this->_addTextPart($message, $this->_txtbody);
for ($i = 0; $i < count($this->_parts); $i++) {
$this->_addAttachmentPart($message, $this->_parts[$i]);
}
break;
case $html AND !$attachments AND !$html_images:
if (isset($this->_txtbody)) {
$message =& $this->_addAlternativePart($null);
$this->_addTextPart($message, $this->_txtbody);
$this->_addHtmlPart($message);
} else {
$message =& $this->_addHtmlPart($null);
}
break;
case $html AND !$attachments AND $html_images:
if (isset($this->_txtbody)) {
$message =& $this->_addAlternativePart($null);
$this->_addTextPart($message, $this->_txtbody);
$related =& $this->_addRelatedPart($message);
} else {
$message =& $this->_addRelatedPart($null);
$related =& $message;
}
$this->_addHtmlPart($related);
for ($i = 0; $i < count($this->_html_images); $i++) {
$this->_addHtmlImagePart($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
