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<?php
/**
* The Mail_mimePart class is used to create MIME E-mail messages
*
* This class enables you to manipulate and build a mime email
* from the ground up. The Mail_Mime class 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.
*
* Compatible with PHP version 5, 7 and 8
*
* 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 Cipriano Groenendal <cipri@php.net>
* @author Sean Coates <sean@php.net>
* @author Aleksander Machniak <alec@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
*/
/**
* Require PEAR
*
* This package depends on PEAR to raise errors.
*/
require_once 'PEAR.php';
/**
* The Mail_mimePart class is used to create MIME E-mail messages
*
* This class enables you to manipulate and build a mime email
* from the ground up. The Mail_Mime class 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.
*
* @category Mail
* @package Mail_Mime
* @author Richard Heyes <richard@phpguru.org>
* @author Cipriano Groenendal <cipri@php.net>
* @author Sean Coates <sean@php.net>
* @author Aleksander Machniak <alec@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_mimePart
{
/**
* The encoding type of this part
*
* @var string
*/
protected $encoding;
/**
* An array of subparts
*
* @var array
*/
protected $subparts = array();
/**
* The output of this part after being built
*
* @var string
*/
protected $encoded;
/**
* Headers for this part
*
* @var array
*/
protected $headers = array();
/**
* The body of this part (not encoded)
*
* @var string
*/
protected $body;
/**
* The location of file with body of this part (not encoded)
*
* @var string
*/
protected $body_file;
/**
* The short text of multipart part preamble (RFC2046 5.1.1)
*
* @var string
*/
protected $preamble;
/**
* The end-of-line sequence
*
* @var string
*/
protected $eol = "\r\n";
/**
* Constructor.
*
* Sets up the object.
*
* @param string $body The body of the mime part if any.
* @param array $params An associative array of optional parameters:
* - content_type: The content type for this part eg multipart/mixed
* - encoding: The encoding to use, 7bit, 8bit, base64, or quoted-printable
* - charset: Content character set
* - cid: Content ID to apply
* - disposition: Content disposition, inline or attachment
* - filename: Filename parameter for content disposition
* - description: Content description
* - name_encoding: Encoding of the attachment name (Content-Type)
* By default filenames are encoded using RFC2231
* Here you can set RFC2047 encoding (quoted-printable
* or base64) instead
* - filename_encoding: Encoding of the attachment filename (Content-Disposition)
* See 'name_encoding'
* - headers_charset: Charset of the headers e.g. filename, description.
* If not set, 'charset' will be used
* - eol: End of line sequence. Default: "\r\n"
* - headers: Hash array with additional part headers. Array keys
* can be in form of <header_name>:<parameter_name>
* - body_file: Location of file with part's body (instead of $body)
* - preamble: short text of multipart part preamble (RFC2046 5.1.1)
*/
public function __construct($body = '', $params = array())
{
if (!empty($params['eol'])) {
$this->eol = $params['eol'];
} else if (defined('MAIL_MIMEPART_CRLF')) { // backward-copat.
$this->eol = MAIL_MIMEPART_CRLF;
}
// Additional part headers
if (!empty($params['headers']) && is_array($params['headers'])) {
$headers = $params['headers'];
}
foreach ($params as $key => $value) {
switch ($key) {
case 'encoding':
$this->encoding = $value;
$headers['Content-Transfer-Encoding'] = $value;
break;
case 'cid':
$headers['Content-ID'] = '<' . $value . '>';
break;
case 'location':
$headers['Content-Location'] = $value;
break;
case 'body_file':
$this->body_file = $value;
break;
case 'preamble':
$this->preamble = $value;
break;
// for backward compatibility
case 'dfilename':
$params['filename'] = $value;
break;
}
}
// Default content-type
if (empty($params['content_type'])) {
$params['content_type'] = 'text/plain';
}
// Content-Type
$headers['Content-Type'] = $params['content_type'];
if (!empty($params['charset'])) {
$charset = "charset={$params['charset']}";
// place charset parameter in the same line, if possible
if ((strlen($headers['Content-Type']) + strlen($charset) + 16) <= 76) {
$headers['Content-Type'] .= '; ';
} else {
$headers['Content-Type'] .= ';' . $this->eol . ' ';
}
$headers['Content-Type'] .= $charset;
// Default headers charset
if (!isset($params['headers_charset'])) {
$params['headers_charset'] = $params['charset'];
}
}
// header values encoding parameters
$h_charset = !empty($params['headers_charset']) ? $params['headers_charset'] : 'US-ASCII';
$h_language = !empty($params['language']) ? $params['language'] : null;
$h_encoding = !empty($params['name_encoding']) ? $params['name_encoding'] : null;
if (!empty($params['filename'])) {
$headers['Content-Type'] .= ';' . $this->eol;
$headers['Content-Type'] .= $this->buildHeaderParam(
'name', $params['filename'], $h_charset, $h_language, $h_encoding
);
}
// Content-Disposition
if (!empty($params['disposition'])) {
$headers['Content-Disposition'] = $params['disposition'];
if (!empty($params['filename'])) {
$headers['Content-Disposition'] .= ';' . $this->eol;
$headers['Content-Disposition'] .= $this->buildHeaderParam(
'filename', $params['filename'], $h_charset, $h_language,
!empty($params['filename_encoding']) ? $params['filename_encoding'] : null
);
}
// add attachment size
$size = $this->body_file ? filesize($this->body_file) : strlen($body);
if ($size) {
$headers['Content-Disposition'] .= ';' . $this->eol . ' size=' . $size;
}
}
if (!empty($params['description'])) {
$headers['Content-Description'] = $this->encodeHeader(
'Content-Description', $params['description'], $h_charset, $h_encoding,
$this->eol
);
}
// Search and add existing headers' parameters
foreach ($headers as $key => $value) {
$items = explode(':', $key);
if (count($items) == 2) {
$header = $items[0];
$param = $items[1];
if (isset($headers[$header])) {
$headers[$header] .= ';' . $this->eol;
}
$headers[$header] .= $this->buildHeaderParam(
$param, $value, $h_charset, $h_language, $h_encoding
);
unset($headers[$key]);
}
}
// Default encoding
if (!isset($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
*
* @param string $boundary Pre-defined boundary string
*
* @return An associative array containing two elements,
* body and headers. The headers element is itself
* an indexed array. On error returns PEAR error object.
*/
public function encode($boundary=null)
{
$encoded =& $this->encoded;
if (count($this->subparts)) {
$boundary = $boundary ? $boundary : '=_' . md5(rand() . microtime());
$eol = $this->eol;
$this->headers['Content-Type'] .= ";$eol boundary=\"$boundary\"";
$encoded['body'] = '';
if ($this->preamble) {
$encoded['body'] .= $this->preamble . $eol . $eol;
}
for ($i = 0; $i < count($this->subparts); $i++) {
$encoded['body'] .= '--' . $boundary . $eol;
$tmp = $this->subparts[$i]->encode();
if (is_a($tmp, 'PEAR_Error')) {
return $tmp;
}
foreach ($tmp['headers'] as $key => $value) {
$encoded['body'] .= $key . ': ' . $value . $eol;
}
$encoded['body'] .= $eol . $tmp['body'] . $eol;
}
$encoded['body'] .= '--' . $boundary . '--' . $eol;
} else if ($this->body) {
$encoded['body'] = $this->getEncodedData($this->body, $this->encoding);
} else if ($this->body_file) {
// Temporarily reset magic_quotes_runtime for file reads and writes
if (version_compare(PHP_VERSION, '5.4.0', '<')) {
$magic_quotes = @ini_set('magic_quotes_runtime', 0);
}
$body = $this->getEncodedDataFromFile($this->body_file, $this->encoding);
if (isset($magic_quotes)) {
@ini_set('magic_quotes_runtime', $magic_quotes);
}
if (is_a($body, 'PEAR_Error')) {
return $body;
}
$encoded['body'] = $body;
} else {
$encoded['body'] = '';
}
// Add headers to $encoded
$encoded['headers'] =& $this->headers;
return $encoded;
}
/**
* Encodes and saves the email into file or stream.
* Data will be appended to the file/stream.
*
* @param mixed $filename Existing file location
* or file pointer resource
* @param string $boundary Pre-defined boundary string
* @param boolean $skip_head True if you don't want to save headers
*
* @return array An associative array containing message headers
* or PEAR error object
* @since 1.6.0
*/
public function encodeToFile($filename, $boundary = null, $skip_head = false)
{
if (!is_resource($filename)) {
if (file_exists($filename) && !is_writable($filename)) {
$err = self::raiseError('File is not writeable: ' . $filename);
return $err;
}
if (!($fh = fopen($filename, 'ab'))) {
$err = self::raiseError('Unable to open file: ' . $filename);
return $err;
}
} else {
$fh = $filename;
}
// Temporarily reset magic_quotes_runtime for file reads and writes
if (version_compare(PHP_VERSION, '5.4.0', '<')) {
$magic_quotes = @ini_set('magic_quotes_runtime', 0);
}
$res = $this->encodePartToFile($fh, $boundary, $skip_head);
if (!is_resource($filename)) {
fclose($fh);
}
if (isset($magic_quotes)) {
@ini_set('magic_quotes_runtime', $magic_quotes);
}
return is_a($res, 'PEAR_Error') ? $res : $this->headers;
}
/**
* Encodes given email part into file
*
* @param string $fh Output file handle
* @param string $boundary Pre-defined boundary string
* @param boolean $skip_head True if you don't want to save headers
*
* @return array True on sucess or PEAR error object
*/
protected function encodePartToFile($fh, $boundary = null, $skip_head = false)
{
$eol = $this->eol;
if (count($this->subparts)) {
$boundary = $boundary ? $boundary : '=_' . md5(rand() . microtime());
$this->headers['Content-Type'] .= ";$eol boundary=\"$boundary\"";
}
if (!$skip_head) {
foreach ($this->headers as $key => $value) {
fwrite($fh, $key . ': ' . $value . $eol);
}
$f_eol = $eol;
} else {
$f_eol = '';
}
if (count($this->subparts)) {
if ($this->preamble) {
fwrite($fh, $f_eol . $this->preamble . $eol);
$f_eol = $eol;
}
for ($i = 0; $i < count($this->subparts); $i++) {
fwrite($fh, $f_eol . '--' . $boundary . $eol);
$res = $this->subparts[$i]->encodePartToFile($fh);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
$f_eol = $eol;
}
fwrite($fh, $eol . '--' . $boundary . '--' . $eol);
} else if ($this->body) {
fwrite($fh, $f_eol);
fwrite($fh, $this->getEncodedData($this->body, $this->encoding));
} else if ($this->body_file) {
fwrite($fh, $f_eol);
$res = $this->getEncodedDataFromFile(
$this->body_file, $this->encoding, $fh
);
if (is_a($res, 'PEAR_Error')) {
return $res;
}
}
return true;
}
/**
* Adds a subpart to current mime part and returns
* a reference to it
*
* @param mixed $body The body of the subpart or Mail_mimePart object
* @param array $params The parameters for the subpart, same
* as the $params argument for constructor
*
* @return Mail_mimePart A reference to the part you just added.
*/
public function addSubpart($body, $params = null)
{
if ($body instanceof Mail_mimePart) {
$part = $body;
} else {
$part = new Mail_mimePart($body, $params);
}
$this->subparts[] = $part;
return $part;
}
/**
* Returns encoded data based upon encoding passed to it
*
* @param string $data The data to encode.
* @param string $encoding The encoding type to use, 7bit, base64,
* or quoted-printable.
*
* @return string Encoded data string
*/
protected function getEncodedData($data, $encoding)
{
switch ($encoding) {
case 'quoted-printable':
return self::quotedPrintableEncode($data, 76, $this->eol);
break;
case 'base64':
return rtrim(chunk_split(base64_encode($data), 76, $this->eol));
break;
case '8bit':
case '7bit':
default:
return $data;
}
}
/**
* Returns encoded data based upon encoding passed to it
*
* @param string $filename Data file location
* @param string $encoding The encoding type to use, 7bit, base64,
* or quoted-printable.
* @param resource $fh Output file handle. If set, data will be
* stored into it instead of returning it
*
* @return string Encoded data or PEAR error object
*/
protected function getEncodedDataFromFile($filename, $encoding, $fh = null)
{
if (!is_readable($filename)) {
$err = self::raiseError('Unable to read file: ' . $filename);
return $err;
}
if (!($fd = fopen($filename, 'rb'))) {
$err = self::raiseError('Could not open file: ' . $filename);
return $err;
}
$data = '';
switch ($encoding) {
case 'quoted-printable':
while (!feof($fd)) {
$buffer = self::quotedPrintableEncode(fgets($fd), 76, $this->eol);
if ($fh) {
fwrite($fh, $buffer);
} else {
$data .= $buffer;
}
}
break;
case 'base64':
while (!feof($fd)) {
// Should read in a multiple of 57 bytes so that
// the output is 76 bytes per line. Don't use big chunks
// because base64 encoding is memory expensive
$buffer = fread($fd, 57 * 9198); // ca. 0.5 MB
$buffer = base64_encode($buffer);
$buffer = chunk_split($buffer, 76, $this->eol);
if (feof($fd)) {
$buffer = rtrim($buffer);
}
if ($fh) {
fwrite($fh, $buffer);
} else {
$data .= $buffer;
}
}
break;
case '8bit':
case '7bit':
default:
while (!feof($fd)) {
$buffer = fread($fd, 1048576); // 1 MB
if ($fh) {
fwrite($fh, $buffer);
} else {
$data .= $buffer;
}
}
}
fclose($fd);
if (!$fh) {
return $data;
}
}
/**
* Encodes data to quoted-printable standard.
*
* @param string $input The data to encode
* @param int $line_max Optional max line length. Should
* not be more than 76 chars
* @param string $eol End-of-line sequence. Default: "\r\n"
*
* @return string Encoded data
*/
public static function quotedPrintableEncode($input , $line_max = 76, $eol = "\r\n")
{
/*
// imap_8bit() is extremely fast, but doesn't handle properly some characters
if (function_exists('imap_8bit') && $line_max == 76) {
$input = preg_replace('/\r?\n/', "\r\n", $input);
$input = imap_8bit($input);
if ($eol != "\r\n") {
$input = str_replace("\r\n", $eol, $input);
}
return $input;
}
*/
$lines = preg_split("/\r?\n/", $input);
$escape = '=';
$output = '';
foreach ($lines as $idx => $line) {
$newline = '';
$i = 0;
while (isset($line[$i])) {
$char = $line[$i];
$dec = ord($char);
$i++;
if (($dec == 32) && (!isset($line[$i]))) {
// convert space at eol only
$char = '=20';
} elseif ($dec == 9 && isset($line[$i])) {
; // Do nothing if a TAB is not on eol
} elseif (($dec == 61) || ($dec < 32) || ($dec > 126)) {
// Escape unprintable chars
$char = $escape . sprintf('%02X', $dec);
} elseif (($dec == 46) && (($newline == '')
|| ((strlen($newline) + strlen(".=")) > $line_max
&& isset($line[$i])))
) {
// Bug #9722: convert full-stop at bol,
// some Windows servers need this, won't break anything (cipri)
// Bug #11731: full-stop at bol also needs to be encoded
// if this line would push us over the line_max limit.
$char = '=2E';
}
// EOL is not counted
if ((strlen($newline) + strlen($char) == $line_max)
&& !isset($line[$i])
) {
; // no soft break is needed if we're the last char
} elseif ((strlen($newline) + strlen($char)) >= $line_max) {
// soft line break; " =\r\n" is okay
$output .= $newline . $escape . $eol;
$newline = '';
}
$newline .= $char;
} // end of for
$output .= $newline . $eol;
unset($lines[$idx]);
}
// Don't want last crlf
$output = substr($output, 0, -1 * strlen($eol));
return $output;
}
/**
* Encodes the parameter of a header.
*
* @param string $name The name of the header-parameter
* @param string $value The value of the paramter
* @param string $charset The characterset of $value
* @param string $language The language used in $value
* @param string $encoding Parameter encoding. If not set, parameter value
* is encoded according to RFC2231
* @param int $maxLength The maximum length of a line. Defauls to 75
*
* @return string
*/
protected function buildHeaderParam($name, $value, $charset = null,
$language = null, $encoding = null, $maxLength = 75
) {
// RFC 2045:
// value needs encoding if contains non-ASCII chars or is longer than 78 chars
if (!preg_match('#[^\x20-\x7E]#', $value)) {
$token_regexp = '#([^\x21\x23-\x27\x2A\x2B\x2D'
. '\x2E\x30-\x39\x41-\x5A\x5E-\x7E])#';
if (!preg_match($token_regexp, $value)) {
// token
if (strlen($name) + strlen($value) + 3 <= $maxLength) {
return " {$name}={$value}";
}
} else {
// quoted-string
$quoted = addcslashes($value, '\\"');
if (strlen($name) + strlen($quoted) + 5 <= $maxLength) {
return " {$name}=\"{$quoted}\"";
}
}
}
// RFC2047: use quoted-printable/base64 encoding
if ($encoding == 'quoted-printable' || $encoding == 'base64') {
return $this->buildRFC2047Param($name, $value, $charset, $encoding);
}
// RFC2231:
$encValue = preg_replace_callback(
'/([^\x21\x23\x24\x26\x2B\x2D\x2E\x30-\x39\x41-\x5A\x5E-\x7E])/',
array($this, 'encodeReplaceCallback'), $value
);
$value = "$charset'$language'$encValue";
$header = " {$name}*={$value}";
if (strlen($header) <= $maxLength) {
return $header;
}
$preLength = strlen(" {$name}*0*=");
$maxLength = max(16, $maxLength - $preLength - 3);
$maxLengthReg = "|(.{0,$maxLength}[^\%][^\%])|";
$headers = array();
$headCount = 0;
while ($value) {
$matches = array();
$found = preg_match($maxLengthReg, $value, $matches);
if ($found) {
$headers[] = " {$name}*{$headCount}*={$matches[0]}";
$value = substr($value, strlen($matches[0]));
} else {
$headers[] = " {$name}*{$headCount}*={$value}";
$value = '';
}
$headCount++;
}
$headers = implode(';' . $this->eol, $headers);
return $headers;
}
/**
* Encodes header parameter as per RFC2047 if needed
*
* @param string $name The parameter name
* @param string $value The parameter value
* @param string $charset The parameter charset
* @param string $encoding Encoding type (quoted-printable or base64)
* @param int $maxLength Encoded parameter max length. Default: 76
*
* @return string Parameter line
*/
protected function buildRFC2047Param($name, $value, $charset,
$encoding = 'quoted-printable', $maxLength = 76
) {
// WARNING: RFC 2047 says: "An 'encoded-word' MUST NOT be used in
// parameter of a MIME Content-Type or Content-Disposition field",
// but... it's supported by many clients/servers
$quoted = '';
if ($encoding == 'base64') {
$value = base64_encode($value);
$prefix = '=?' . $charset . '?B?';
$suffix = '?=';
// 2 x SPACE, 2 x '"', '=', ';'
$add_len = strlen($prefix . $suffix) + strlen($name) + 6;
$len = $add_len + strlen($value);
while ($len > $maxLength) {
// We can cut base64-encoded string every 4 characters
$real_len = floor(($maxLength - $add_len) / 4) * 4;
$_quote = substr($value, 0, $real_len);
$value = substr($value, $real_len);
$quoted .= $prefix . $_quote . $suffix . $this->eol . ' ';
$add_len = strlen($prefix . $suffix) + 4; // 2 x SPACE, '"', ';'
$len = strlen($value) + $add_len;
}
$quoted .= $prefix . $value . $suffix;
} else {
// quoted-printable
$value = $this->encodeQP($value);
$prefix = '=?' . $charset . '?Q?';
$suffix = '?=';
// 2 x SPACE, 2 x '"', '=', ';'
$add_len = strlen($prefix . $suffix) + strlen($name) + 6;
$len = $add_len + strlen($value);
while ($len > $maxLength) {
$length = $maxLength - $add_len;
// don't break any encoded letters
if (preg_match("/^(.{0,$length}[^\=][^\=])/", $value, $matches)) {
$_quote = $matches[1];
}
$quoted .= $prefix . $_quote . $suffix . $this->eol . ' ';
$value = substr($value, strlen($_quote));
$add_len = strlen($prefix . $suffix) + 4; // 2 x SPACE, '"', ';'
$len = strlen($value) + $add_len;
}
$quoted .= $prefix . $value . $suffix;
}
return " {$name}=\"{$quoted}\"";
}
/**
* Return charset for mbstring functions.
* Replace ISO-2022-JP with ISO-2022-JP-MS to convert Windows dependent
* characters.
*
* @param string $charset A original charset
*
* @return string A charset for mbstring
* @since 1.10.8
*/
protected static function mbstringCharset($charset)
{
$mb_charset = $charset;
if ($charset == 'ISO-2022-JP') {
$mb_charset = 'ISO-2022-JP-MS';
}
return $mb_charset;
}
/**
* Encodes a header as per RFC2047
*
* @param string $name The header name
* @param string $value The header data to encode
* @param string $charset Character set name
* @param string $encoding Encoding name (base64 or quoted-printable)
* @param string $eol End-of-line sequence. Default: "\r\n"
*
* @return string Encoded header data (without a name)
* @since 1.6.1
*/
public static function encodeHeader($name, $value, $charset = 'ISO-8859-1',
$encoding = 'quoted-printable', $eol = "\r\n"
) {
// Structured headers
$comma_headers = array(
'from', 'to', 'cc', 'bcc', 'sender', 'reply-to',
'resent-from', 'resent-to', 'resent-cc', 'resent-bcc',
'resent-sender', 'resent-reply-to',
'mail-reply-to', 'mail-followup-to',
'return-receipt-to', 'disposition-notification-to',
);
$other_headers = array(
'references', 'in-reply-to', 'message-id', 'resent-message-id',
);
$name = strtolower($name);
if (in_array($name, $comma_headers)) {
$separator = ',';
} else if (in_array($name, $other_headers)) {
$separator = ' ';
}
if (!$charset) {
$charset = 'ISO-8859-1';
}
// exploding quoted strings as well as some regexes below do not
// work properly with some charset e.g. ISO-2022-JP, we'll use UTF-8
$mb = $charset != 'UTF-8' && function_exists('mb_convert_encoding');
$mb_charset = Mail_mimePart::mbstringCharset($charset);
// Structured header (make sure addr-spec inside is not encoded)
if (!empty($separator)) {
// Simple e-mail address regexp
$email_regexp = '([^\s<]+|("[^\r\n"]+"))@[^\s"]+';
if ($mb) {
$value = mb_convert_encoding($value, 'UTF-8', $mb_charset);
}
$parts = Mail_mimePart::explodeQuotedString("[\t$separator]", $value);
$value = '';
foreach ($parts as $part) {
$part = preg_replace('/\r?\n[\s\t]*/', $eol . ' ', $part);
$part = trim($part);
if (!$part) {
continue;
}
if ($value) {
$value .= $separator == ',' ? $separator . ' ' : ' ';
} else {
$value = $name . ': ';
}
// let's find phrase (name) and/or addr-spec
if (preg_match('/^<' . $email_regexp . '>$/', $part)) {
$value .= $part;
} else if (preg_match('/^' . $email_regexp . '$/', $part)) {
// address without brackets and without name
$value .= $part;
} else if (preg_match('/<*' . $email_regexp . '>*$/', $part, $matches)) {
// address with name (handle name)
$address = $matches[0];
$word = str_replace($address, '', $part);
$word = trim($word);
// check if phrase requires quoting
if ($word) {
// non-ASCII: require encoding
if (preg_match('#([^\s\x21-\x7E]){1}#', $word)) {
if ($word[0] == '"' && $word[strlen($word)-1] == '"') {
// de-quote quoted-string, encoding changes
// string to atom
$word = substr($word, 1, -1);
$word = preg_replace('/\\\\([\\\\"])/', '$1', $word);
}
if ($mb) {
$word = mb_convert_encoding($word, $mb_charset, 'UTF-8');
}
// find length of last line
if (($pos = strrpos($value, $eol)) !== false) {
$last_len = strlen($value) - $pos;
} else {
$last_len = strlen($value);
}
$word = Mail_mimePart::encodeHeaderValue(
$word, $charset, $encoding, $last_len, $eol
);
} else if (($word[0] != '"' || $word[strlen($word)-1] != '"')
&& preg_match('/[\(\)\<\>\\\.\[\]@,;:"]/', $word)
) {
// ASCII: quote string if needed
$word = '"'.addcslashes($word, '\\"').'"';
}
}
$value .= $word.' '.$address;
} else {
if ($mb) {
$part = mb_convert_encoding($part, $mb_charset, 'UTF-8');
}
// addr-spec not found, don't encode (?)
$value .= $part;
}
// RFC2822 recommends 78 characters limit, use 76 from RFC2047
$value = wordwrap($value, 76, $eol . ' ');
}
// remove header name prefix (there could be EOL too)
$value = preg_replace(
'/^'.$name.':('.preg_quote($eol, '/').')* /', '', $value
);
} else {
// Unstructured header
// non-ASCII: require encoding
if (preg_match('#([^\s\x21-\x7E]){1}#', $value)) {
if ($value[0] == '"' && $value[strlen($value)-1] == '"') {
if ($mb) {
$value = mb_convert_encoding($value, 'UTF-8', $mb_charset);
}
// de-quote quoted-string, encoding changes
// string to atom
$value = substr($value, 1, -1);
$value = preg_replace('/\\\\([\\\\"])/', '$1', $value);
if ($mb) {
$value = mb_convert_encoding($value, $mb_charset, 'UTF-8');
}
}
$value = Mail_mimePart::encodeHeaderValue(
$value, $charset, $encoding, strlen($name) + 2, $eol
);
} else if (strlen($name.': '.$value) > 78) {
// ASCII: check if header line isn't too long and use folding
$value = preg_replace('/\r?\n[\s\t]*/', $eol . ' ', $value);
$tmp = wordwrap($name . ': ' . $value, 78, $eol . ' ');
$value = preg_replace('/^' . $name . ':\s*/', '', $tmp);
// hard limit 998 (RFC2822)
$value = wordwrap($value, 998, $eol . ' ', true);
}
}
return $value;
}
/**
* Explode quoted string
*
* @param string $delimiter Delimiter expression string for preg_match()
* @param string $string Input string
*
* @return array String tokens array
*/
protected static function explodeQuotedString($delimiter, $string)
{
$result = array();
$strlen = strlen($string);
$quoted_string = '"(?:[^"\\\\]|\\\\.)*"';
for ($p=$i=0; $i < $strlen; $i++) {
if ($string[$i] === '"') {
$r = preg_match("/$quoted_string/", $string, $matches, 0, $i);
if (!$r || empty($matches[0])) {
break;
}
$i += strlen($matches[0]) - 1;
} else if (preg_match("/$delimiter/", $string[$i])) {
$result[] = substr($string, $p, $i - $p);
$p = $i + 1;
}
}
$result[] = substr($string, $p);
return $result;
}
/**
* Encodes a header value as per RFC2047
*
* @param string $value The header data to encode
* @param string $charset Character set name
* @param string $encoding Encoding name (base64 or quoted-printable)
* @param int $prefix_len Prefix length. Default: 0
* @param string $eol End-of-line sequence. Default: "\r\n"
*
* @return string Encoded header data
* @since 1.6.1
*/
public static function encodeHeaderValue($value, $charset, $encoding, $prefix_len = 0, $eol = "\r\n")
{
// #17311: Use multibyte aware method (requires mbstring extension)
if ($result = Mail_mimePart::encodeMB($value, $charset, $encoding, $prefix_len, $eol)) {
return $result;
}
// Generate the header using the specified params and dynamicly
// determine the maximum length of such strings.
// 75 is the value specified in the RFC.
$encoding = $encoding == 'base64' ? 'B' : 'Q';
$prefix = '=?' . $charset . '?' . $encoding .'?';
$suffix = '?=';
$maxLength = 75 - strlen($prefix . $suffix);
$maxLength1stLine = $maxLength - $prefix_len;
if ($encoding == 'B') {
// Base64 encode the entire string
$value = base64_encode($value);
// We can cut base64 every 4 characters, so the real max
// we can get must be rounded down.
$maxLength = $maxLength - ($maxLength % 4);
$maxLength1stLine = $maxLength1stLine - ($maxLength1stLine % 4);
$cutpoint = $maxLength1stLine;
$output = '';
while ($value) {
// Split translated string at every $maxLength
$part = substr($value, 0, $cutpoint);
$value = substr($value, $cutpoint);
$cutpoint = $maxLength;
// RFC 2047 specifies that any split header should
// be separated by a CRLF SPACE.
if ($output) {
$output .= $eol . ' ';
}
$output .= $prefix . $part . $suffix;
}
$value = $output;
} else {
// quoted-printable encoding has been selected
$value = Mail_mimePart::encodeQP($value);
// This regexp will break QP-encoded text at every $maxLength
// but will not break any encoded letters.
$reg1st = "|(.{0,$maxLength1stLine}[^\=][^\=])|";
$reg2nd = "|(.{0,$maxLength}[^\=][^\=])|";
if (strlen($value) > $maxLength1stLine) {
// Begin with the regexp for the first line.
$reg = $reg1st;
$output = '';
while ($value) {
// Split translated string at every $maxLength
// But make sure not to break any translated chars.
$found = preg_match($reg, $value, $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
// $value_out variable.
if ($found) {
$part = $matches[0];
$len = strlen($matches[0]);
$value = substr($value, $len);
} else {
$part = $value;
$value = '';
}
// RFC 2047 specifies that any split header should
// be separated by a CRLF SPACE
if ($output) {
$output .= $eol . ' ';
}
$output .= $prefix . $part . $suffix;
}
$value = $output;
} else {
$value = $prefix . $value . $suffix;
}
}
return $value;
}
/**
* Encodes the given string using quoted-printable
*
* @param string $str String to encode
*
* @return string Encoded string
* @since 1.6.0
*/
public static function encodeQP($str)
{
// Bug #17226 RFC 2047 restricts some characters
// if the word is inside a phrase, permitted chars are only:
// ASCII letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
// "=", "_", "?" must be encoded
$regexp = '/([\x22-\x29\x2C\x2E\x3A-\x40\x5B-\x60\x7B-\x7E\x80-\xFF])/';
$str = preg_replace_callback(
$regexp, array('Mail_mimePart', 'qpReplaceCallback'), $str
);
return str_replace(' ', '_', $str);
}
/**
* Encodes the given string using base64 or quoted-printable.
* This method makes sure that encoded-word represents an integral
* number of characters as per RFC2047.
*
* @param string $str String to encode
* @param string $charset Character set name
* @param string $encoding Encoding name (base64 or quoted-printable)
* @param int $prefix_len Prefix length. Default: 0
* @param string $eol End-of-line sequence. Default: "\r\n"
*
* @return string Encoded string
* @since 1.8.0
*/
public static function encodeMB($str, $charset, $encoding, $prefix_len=0, $eol="\r\n")
{
if (!function_exists('mb_substr') || !function_exists('mb_strlen')) {
return;
}
$encoding = $encoding == 'base64' ? 'B' : 'Q';
// 75 is the value specified in the RFC
$prefix = '=?' . $charset . '?'.$encoding.'?';
$suffix = '?=';
$maxLength = 75 - strlen($prefix . $suffix);
$mb_charset = Mail_mimePart::mbstringCharset($charset);
// A multi-octet character may not be split across adjacent encoded-words
// So, we'll loop over each character
// mb_stlen() with wrong charset will generate a warning here and return null
$length = mb_strlen($str, $mb_charset);
$result = '';
$line_length = $prefix_len;
if ($encoding == 'B') {
// base64
$start = 0;
$prev = '';
for ($i=1; $i<=$length; $i++) {
// See #17311
$chunk = mb_substr($str, $start, $i-$start, $mb_charset);
$chunk = base64_encode($chunk);
$chunk_len = strlen($chunk);
if ($line_length + $chunk_len == $maxLength || $i == $length) {
if ($result) {
$result .= "\n";
}
$result .= $chunk;
$line_length = 0;
$start = $i;
} else if ($line_length + $chunk_len > $maxLength) {
if ($result) {
$result .= "\n";
}
if ($prev) {
$result .= $prev;
}
$line_length = 0;
$start = $i - 1;
} else {
$prev = $chunk;
}
}
} else {
// quoted-printable
// see encodeQP()
$regexp = '/([\x22-\x29\x2C\x2E\x3A-\x40\x5B-\x60\x7B-\x7E\x80-\xFF])/';
for ($i=0; $i<=$length; $i++) {
$char = mb_substr($str, $i, 1, $mb_charset);
// RFC recommends underline (instead of =20) in place of the space
// that's one of the reasons why we're not using iconv_mime_encode()
if ($char == ' ') {
$char = '_';
$char_len = 1;
} else {
$char = preg_replace_callback(
$regexp, array('Mail_mimePart', 'qpReplaceCallback'), $char
);
$char_len = strlen($char);
}
if ($line_length + $char_len > $maxLength) {
if ($result) {
$result .= "\n";
}
$line_length = 0;
}
$result .= $char;
$line_length += $char_len;
}
}
if ($result) {
$result = $prefix
.str_replace("\n", $suffix.$eol.' '.$prefix, $result).$suffix;
}
return $result;
}
/**
* Callback function to replace extended characters (\x80-xFF) with their
* ASCII values (RFC2047: quoted-printable)
*
* @param array $matches Preg_replace's matches array
*
* @return string Encoded character string
*/
protected static function qpReplaceCallback($matches)
{
return sprintf('=%02X', ord($matches[1]));
}
/**
* Callback function to replace extended characters (\x80-xFF) with their
* ASCII values (RFC2231)
*
* @param array $matches Preg_replace's matches array
*
* @return string Encoded character string
*/
protected static function encodeReplaceCallback($matches)
{
return sprintf('%%%02X', ord($matches[1]));
}
/**
* PEAR::raiseError implementation
*
* @param string $message A text error message
*
* @return PEAR_Error Instance of PEAR_Error
*/
public static function raiseError($message)
{
// PEAR::raiseError() is not PHP 5.4 compatible
return new PEAR_Error($message);
}
}
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