mimedecode.php

apache windows下的一款好

        } else {
            $return = array();
        }

        return $return;
    }

    /**
     * Function to parse a header value,
     * extract first part, and any secondary
     * parts (after ;) This function is not as
     * robust as it could be. Eg. header comments
     * in the wrong place will probably break it.
     * 
     * @param string Header value to parse
     * @return array Contains parsed result
     * @access private
     */
    function _parseHeaderValue($input)
    {

        if (($pos = strpos($input, ';')) !== false) {

            $return['value'] = trim(substr($input, 0, $pos));
            $input = trim(substr($input, $pos+1));

            if (strlen($input) > 0) {
                preg_match_all('/(([[:alnum:]]+)="?([^"]*)"?\s?;?)+/i', $input, $matches);

                for ($i = 0; $i < count($matches[2]); $i++) {
                    $return['other'][strtolower($matches[2][$i])] = $matches[3][$i];
                }
            }
        } else {
            $return['value'] = trim($input);
        }
        
        return $return;
    }

    /**
     * This function splits the input based
     * on the given boundary
     * 
     * @param string Input to parse
     * @return array Contains array of resulting mime parts
     * @access private
     */
    function _boundarySplit($input, $boundary)
    {
        $tmp = explode('--'.$boundary, $input);

        for ($i=1; $i<count($tmp)-1; $i++) {
            $parts[] = $tmp[$i];
        }

        return $parts;
    }

    /**
     * Given a header, this function will decode it
     * according to RFC2047. Probably not *exactly*
     * conformant, but it does pass all the given
     * examples (in RFC2047).
     *
     * @param string Input header value to decode
     * @return string Decoded header value
     * @access private
     */
    function _decodeHeader($input)
    {
        // Remove white space between encoded-words
        $input = preg_replace('/(=\?[^?]+\?(Q|B)\?[^?]*\?=)( |' . "\t|" . $this->_crlf . ')+=\?/', '\1=?', $input);

        // For each encoded-word...
        while (preg_match('/(=\?([^?]+)\?(Q|B)\?([^?]*)\?=)/', $input, $matches)) {

            $encoded  = $matches[1];
            $charset  = $matches[2];
            $encoding = $matches[3];
            $text     = $matches[4];

            switch ($encoding) {
                case 'B':
                    $text = base64_decode($text);
                    break;

                case 'Q':
                    $text = str_replace('_', ' ', $text);
                    preg_match_all('/=([A-F0-9]{2})/', $text, $matches);
                    foreach($matches[1] as $value)
                        $text = str_replace('='.$value, chr(hexdec($value)), $text);
                    break;
            }

            $input = str_replace($encoded, $text, $input);
        }
        
        return $input;
    }

    /**
     * Given a body string and an encoding type, 
     * this function will decode and return it.
     *
     * @param  string Input body to decode
     * @param  string Encoding type to use.
     * @return string Decoded body
     * @access private
     */
    function _decodeBody($input, $encoding = '7bit')
    {
        switch ($encoding) {
            case '7bit':
                return $input;
                break;

            case 'quoted-printable':
                return $this->_quotedPrintableDecode($input);
                break;

            case 'base64':
                return base64_decode($input);
                break;

            default:
                return $input;
        }
    }

    /**
     * Given a quoted-printable string, this
     * function will decode and return it.
     *
     * @param  string Input body to decode
     * @return string Decoded body
     * @access private
     */
    function _quotedPrintableDecode($input)
    {
        // Remove soft line breaks
        $input = preg_replace("/=\r?\n/", '', $input);

        // Replace encoded characters
        if (preg_match_all('/=[A-Z0-9]{2}/', $input, $matches)) {
            $matches = array_unique($matches[0]);
            foreach ($matches as $value) {
                $input = str_replace($value, chr(hexdec(substr($value,1))), $input);
            }
        }

        return $input;
    }

    /**
     * Checks the input for uuencoded files and returns
     * an array of them. Can be called statically, eg:
     *
     * $files =& Mail_mimeDecode::uudecode($some_text);
     *
     * It will check for the begin 666 ... end syntax
     * however and won't just blindly decode whatever you
     * pass it.
     *
     * @param  string Input body to look for attahcments in
     * @return array  Decoded bodies, filenames and permissions
     * @access public
     * @author Unknown
     */
    function &uudecode($input)
    {
        // Find all uuencoded sections
        preg_match_all("/begin ([0-7]{3}) (.+)\r?\n(.+)\r?\nend/Us", $input, $matches);

        for ($j = 0; $j < count($matches[3]); $j++) {

            $str      = $matches[3][$j];
            $filename = $matches[2][$j];
            $fileperm = $matches[1][$j];

            $file = '';
            $str = preg_split("/\r?\n/", trim($str));
            $strlen = count($str);
    
            for ($i = 0; $i < $strlen; $i++) {
                $pos = 1;
                $d = 0;
                $len=(int)(((ord(substr($str[$i],0,1)) -32) - ' ') & 077);
    
                while (($d + 3 <= $len) AND ($pos + 4 <= strlen($str[$i]))) {
                    $c0 = (ord(substr($str[$i],$pos,1)) ^ 0x20);
                    $c1 = (ord(substr($str[$i],$pos+1,1)) ^ 0x20);
                    $c2 = (ord(substr($str[$i],$pos+2,1)) ^ 0x20);
                    $c3 = (ord(substr($str[$i],$pos+3,1)) ^ 0x20);
                    $file .= chr(((($c0 - ' ') & 077) << 2) | ((($c1 - ' ') & 077) >> 4));
        
                    $file .= chr(((($c1 - ' ') & 077) << 4) | ((($c2 - ' ') & 077) >> 2));
        
                    $file .= chr(((($c2 - ' ') & 077) << 6) |  (($c3 - ' ') & 077));
        
                    $pos += 4;
                    $d += 3;
                }
        
                if (($d + 2 <= $len) && ($pos + 3 <= strlen($str[$i]))) {
                    $c0 = (ord(substr($str[$i],$pos,1)) ^ 0x20);
                    $c1 = (ord(substr($str[$i],$pos+1,1)) ^ 0x20);
                    $c2 = (ord(substr($str[$i],$pos+2,1)) ^ 0x20);
                    $file .= chr(((($c0 - ' ') & 077) << 2) | ((($c1 - ' ') & 077) >> 4));
        
                    $file .= chr(((($c1 - ' ') & 077) << 4) | ((($c2 - ' ') & 077) >> 2));
        
                    $pos += 3;
                    $d += 2;
                }
        
                if (($d + 1 <= $len) && ($pos + 2 <= strlen($str[$i]))) {
                    $c0 = (ord(substr($str[$i],$pos,1)) ^ 0x20);
                    $c1 = (ord(substr($str[$i],$pos+1,1)) ^ 0x20);
                    $file .= chr(((($c0 - ' ') & 077) << 2) | ((($c1 - ' ') & 077) >> 4));
        
                }
            }
            $files[] = array('filename' => $filename, 'fileperm' => $fileperm, 'filedata' => $file);
        }

        return $files;
    }

    /**
     * Returns a xml copy of the output of
     * Mail_mimeDecode::decode. Pass the output in as the
     * argument. This function can be called statically. Eg:
     *
     * $output = $obj->decode();
     * $xml    = Mail_mimeDecode::getXML($output);
     *
     * The DTD used for this should have been in the package. Or
     * alternatively you can get it from cvs, or here:
     * http://www.phpguru.org/xmail/xmail.dtd.
     *
     * @param  object Input to convert to xml. This should be the
     *                output of the Mail_mimeDecode::decode function
     * @return string XML version of input
     * @access public
     */
    function getXML($input)
    {
        $crlf    =  "\r\n";
        $output  = '<?xml version=\'1.0\'?>' . $crlf .
                   '<!DOCTYPE email SYSTEM "http://www.phpguru.org/xmail/xmail.dtd">' . $crlf .
                   '<email>' . $crlf .
                   Mail_mimeDecode::_getXML($input) .
                   '</email>';

        return $output;
    }

    /**
     * Function that does the actual conversion to xml. Does a single
     * mimepart at a time.
     *
     * @param  object  Input to convert to xml. This is a mimepart object.
     *                 It may or may not contain subparts.
     * @param  integer Number of tabs to indent
     * @return string  XML version of input
     * @access private
     */
    function _getXML($input, $indent = 1)
    {
        $htab    =  "\t";
        $crlf    =  "\r\n";
        $output  =  '';
        $headers =& $input->headers;

        foreach ($headers as $hdr_name => $hdr_value) {

            // Multiple headers with this name
            if (is_array($headers[$hdr_name])) {
                for ($i = 0; $i < count($hdr_value); $i++) {
                    $output .= Mail_mimeDecode::_getXML_helper($hdr_name, $hdr_value[$i], $indent);
                }

            // Only one header of this sort
            } else {
                $output .= Mail_mimeDecode::_getXML_helper($hdr_name, $hdr_value, $indent);
            }
        }

        if (!empty($input->parts)) {
            for ($i = 0; $i < count($input->parts); $i++) {
                $output .= $crlf . str_repeat($htab, $indent) . '<mimepart>' . $crlf .
                           Mail_mimeDecode::_getXML($input->parts[$i], $indent+1) .
                           str_repeat($htab, $indent) . '</mimepart>' . $crlf;
            }
        } else {
            $output .= $crlf . str_repeat($htab, $indent) . '<body><![CDATA[' .
                       $input->body . ']]></body>' . $crlf;
        }

        return $output;
    }

    /**
     * Helper function to _getXML(). Returns xml of a header.
     *
     * @param  string  Name of header
     * @param  string  Value of header
     * @param  integer Number of tabs to indent
     * @return string  XML version of input
     * @access private
     */
    function _getXML_helper($hdr_name, $hdr_value, $indent)
    {
        $htab   = "\t";
        $crlf   = "\r\n";
        $return = '';

        $new_hdr_value = ($hdr_name != 'received') ? Mail_mimeDecode::_parseHeaderValue($hdr_value) : array('value' => $hdr_value);
        $new_hdr_name  = str_replace(' ', '-', ucwords(str_replace('-', ' ', $hdr_name)));

        // Sort out any parameters
        if (!empty($new_hdr_value['other'])) {
            foreach ($new_hdr_value['other'] as $paramname => $paramvalue) {
                $params[] = str_repeat($htab, $indent) . $htab . '<parameter>' . $crlf .
                            str_repeat($htab, $indent) . $htab . $htab . '<paramname>' . htmlspecialchars($paramname) . '</paramname>' . $crlf .
                            str_repeat($htab, $indent) . $htab . $htab . '<paramvalue>' . htmlspecialchars($paramvalue) . '</paramvalue>' . $crlf .
                            str_repeat($htab, $indent) . $htab . '</parameter>' . $crlf;
            }
            
            $params = implode('', $params);
        } else {
            $params = '';
        }

        $return = str_repeat($htab, $indent) . '<header>' . $crlf .
                  str_repeat($htab, $indent) . $htab . '<headername>' . htmlspecialchars($new_hdr_name) . '</headername>' . $crlf .
                  str_repeat($htab, $indent) . $htab . '<headervalue>' . htmlspecialchars($new_hdr_value['value']) . '</headervalue>' . $crlf .
                  $params .
                  str_repeat($htab, $indent) . '</header>' . $crlf;

        return $return;
    }    

} // End of class
?>