quoted_printable

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Thomas Pequet / Memotoo.com
19-Oct-2006 09:15


If you want a function to do the reverse of "quoted_printable_decode()", follow the link you will find the "quoted_printable_encode()" function:

http://www.memotoo.com/softs/public/PHP/quoted printable_encode.inc.php



Compatible "ENCODING=QUOTED-PRINTABLE"

Example: 

quoted_printable_encode(ut8_encode("c'est quand l't ?")) 

-> "c'est quand l'=C3=A9t=C3=A9 ?"

umu
07-Feb-2006 06:38


...deed.ztinmehc-ut.zrh@umuumu@hrz.tu-chemnitz.deed...



and write [^=]{0,2} in the last regular expression

to avoid the soft linebreak "=" being the 77th char in line,

see my imap_8bit() emulation at    

http://www.php.net/manual/en/function.imap-8bit.php#61216

steffen dot weber at computerbase dot de
23-Jul-2005 05:08


As the two digit hexadecimal representation SHOULD be in uppercase you want to use "=%02X" (uppercase X) instead of "=%02x" as the first argument to sprintf().

bendi at interia dot pl
29-Mar-2005 05:08


This function appeared twice already and in both versions it's got error in rule replacing chunk_split, because it misses the last line in encoded text if it's shorter than 73 characters. 



My solution (got rid of replace_callback)

<?

function quoted_printable_encode( $sString ) {

   /*instead of replace_callback i used <b>e</b> modifier for regex rule, which works as eval php function*/

   $sString = preg_replace( '/[^\x21-\x3C\x3E-\x7E\x09\x20]/e', 'sprintf( "=%02x", ord ( "$0" ) ) ;',  $sString );

   /*now added to this rule one or more chars which lets last line to be matched and included in results*/

   preg_match_all( '/.{1,73}([^=]{0,3})?/', $sString, $aMatch );

   return implode( '=' . CR, $aMatch[0] );

}



?>

dmitry at koterov dot ru
19-Feb-2005 09:26


Previous comment has a bug: encoding of short test does not work because of incorrect usage of preg_match_all(). Have somebody read it at all? :-)



Correct version (seems), with additional imap_8bit() function emulation:



if (!function_exists('imap_8bit')) {

 function imap_8bit($text) {

   return quoted_printable_encode($text);

 }

}



function quoted_printable_encode_character ( $matches ) {

   $character = $matches[0];

   return sprintf ( '=%02x', ord ( $character ) );

}



// based on http://www.freesoft.org/CIE/RFC/1521/6.htm

function quoted_printable_encode ( $string ) {

   // rule #2, #3 (leaves space and tab characters in tact)

   $string = preg_replace_callback (

     '/[^\x21-\x3C\x3E-\x7E\x09\x20]/',

     'quoted_printable_encode_character',

     $string

   );

   $newline = "=\r\n"; // '=' + CRLF (rule #4)

   // make sure the splitting of lines does not interfere with escaped characters

   // (chunk_split fails here)

   $string = preg_replace ( '/(.{73}[^=]{0,3})/', '$1'.$newline, $string);

   return $string;

}

drm at melp dot nl
09-Feb-2005 07:32


A easier, improved way of encoding for quoted-printable transfer:



------

function quoted_printable_encode_character ( $matches ) {

   $character = end ( $matches );

   return sprintf ( '=%02x', ord ( $character ) );

}



// based on http://www.freesoft.org/CIE/RFC/1521/6.htm

function quoted_printable_encode ( $string ) {

   // rule #2, #3 (leaves space and tab characters in tact)

   $string = preg_replace_callback ( 

      '/[^\x21-\x3C\x3E-\x7E\x09\x20]/', 

      'quoted_printable_encode_character',

      $string 

   ); 

   

   $newline = "=\r\n"; // '=' + CRLF (rule #4)



   // make sure the splitting of lines does not interfere with escaped characters 

   // (chunk_split fails here)

   preg_match_all ( '/.{73}([^=]{0,3})/', $string, $match ); // Rule #1

   return implode ( $newline, $match[0] );

}

-----

tamas dot tompa at kirowski dot com
20-Feb-2004 11:46


i have found a bug in pob at medienrecht dot NOSPAM dot org

's qp_enc function. in quoted printable messages need to convert the first pont in the lines too...

here is the fixed code:



function qp_enc( $input = "", $line_max = 76, $space_conv = false ) {



    $hex = array('0','1','2','3','4','5','6','7','8','9',

'A','B','C','D','E','F');

    $lines = preg_split("/(?:\r\n|\r|\n)/", $input);

    $eol = "\r\n";

    $escape = "=";

    $output = "";



        while( list(, $line) = each($lines) ) {

                //$line = rtrim($line); // remove trailing white 

space -> no =20\r\n necessary

                $linlen = strlen($line);

                $newline = "";

                for($i = 0; $i < $linlen; $i++) {

                        $c = substr( $line, $i, 1 );

                        $dec = ord( $c );

                        if ( ( $i == 0 ) && ( $dec == 46 ) ) { // 

convert first point in the line into =2E

                                $c = "=2E";

                        }

                        if ( $dec == 32 ) {

                                if ( $i == ( $linlen - 1 ) ) { // convert

 space at eol only

                                        $c = "=20";

                                } else if ( $space_conv ) {

                                        $c = "=20";

                                }

                        } elseif ( ($dec == 61) || ($dec < 32 ) || 

($dec > 126) ) { // always encode "\t", which is *not* required

                                $h2 = floor($dec/16);

                                $h1 = floor($dec%16);

                                $c = $escape.$hex["$h2"].$hex["$h1"];

                        }

                        if ( (strlen($newline) + strlen($c)) >= 

$line_max ) { // CRLF is not counted

                                $output .= $newline.$escape.$eol; // 

soft line break; " =\r\n" is okay

                                $newline = "";

                                // check if newline first character will 

be point or not

                                if ( $dec == 46 ) {

                                        $c = "=2E";

                                }

                        }

                        $newline .= $c;

                } // end of for

                $output .= $newline.$eol;

        } // end of while

        return trim($output);

}

pinkpanther at swissonline dot ch
05-Jan-2003 07:31


Sorry, above I mixed up QP-Decode and UrlDecode, the example I gave above is in fact UrlDecode:



function UrlDecode($string) {

return preg_replace("/%([0-9A-Fa-f]{2})/e", "chr(hexdec('\\1'))", $string);

}



f.e. replaces '%3F' with '?'



Quoted-printable would be:



function qp_decode($string) {

return preg_replace("/=([0-9A-F]{2})/e", "chr(hexdec('\\1'))", $string);

}



f.e. replaces '=20' with ' '

pob at medienrecht dot NOSPAM dot org
19-Jul-2001 04:06


If you do not have access to imap_* and do not want to use 


$message = chunk_split( base64_encode($message) );


because you want to be able to read the source of your mails, you might want to try this:


(any suggestions very welcome!)








function qp_enc($input = "quoted-printable encoding test string", $line_max = 76) {





    $hex = array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F');


    $lines = preg_split("/(?:\r\n|\r|\n)/", $input);


    $eol = "\r\n";


    $escape = "=";


    $output = "";





    while( list(, $line) = each($lines) ) {


        //$line = rtrim($line); // remove trailing white space -> no =20\r\n necessary


        $linlen = strlen($line);


        $newline = "";


        for($i = 0; $i < $linlen; $i++) {


            $c = substr($line, $i, 1);


            $dec = ord($c);


            if ( ($dec == 32) && ($i == ($linlen - 1)) ) { // convert space at eol only


                $c = "=20"; 


            } elseif ( ($dec == 61) || ($dec < 32 ) || ($dec > 126) ) { // always encode "\t", which is *not* required


                $h2 = floor($dec/16); $h1 = floor($dec%16); 


                $c = $escape.$hex["$h2"].$hex["$h1"]; 


            }


            if ( (strlen($newline) + strlen($c)) >= $line_max ) { // CRLF is not counted


                $output .= $newline.$escape.$eol; // soft line break; " =\r\n" is okay


                $newline = "";


            }


            $newline .= $c;


        } // end of for


        $output .= $newline.$eol;


    }


    return trim($output);





}





$eight_bit = "\xA7 \xC4 \xD6 \xDC \xE4 \xF6 \xFC \xDF         =          xxx             yyy       zzz          \r\n"


            ." \xA7      \r \xC4 \n \xD6 \x09    "; 


print $eight_bit."\r\n---------------\r\n";


$encoded = qp_enc($eight_bit); 


print $encoded;

madmax at express dot ru
04-Aug-2000 08:41


Some  browser (netscape, for example)


send 8-bit quoted printable text like this:


=C5=DD=A3=D2=C1= =DA





"= =" means continuos word.


 php function not detect this situations and translate in string like:


 abcde=f

gustavf at spamstop dot com
08-Jul-2000 01:25


This function does not recognize lowercase letters as part of the Quoted Printable encoding. RFC 1521 specifies:





Uppercase letters must be used when sending hexadecimal data, though a robust implementation may choose to recognize lowercase letters on receipt.

thomas at kenne dot dk
12-Apr-2000 07:09


Try the imap_8bit function, for converting an 8bit string to a quotad printable string.

sunil at nanjang dot com
12-Oct-1999 10:52


hi. i'm php developer in korean.





quoted print decode works well,





but <font color=blue>quoted_printable_decode(str_replace("=\r\n","",$string)</font> works better when MIME email decode.





MIME mail feeds every 76 char (maybe).


and feeding line tlanslate "=\r\n"





so, it better that use <font color=blue>quoted_printable_decode(str_replace("=\r\n","",$line)</font>


when quoted printable MIME decoding.





I test under php3.0.11,..

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quoted_printable_decode

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