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quoted_printable_decode

ludwig at gramberg-webdesign dot de
24-Sep-2007 12:13


my approach for quoted printable encode using the stream converting abilities



<?php

/**

 * @param string $str

 * @return string

 * */

function quoted_printable_encode($str) {

    $fp = fopen('php://temp', 'w+');

    stream_filter_append($fp, 'convert.quoted-printable-encode');

    fwrite($fp, $str);    

    fseek($fp, 0);

    $result = '';

    while(!feof($fp))

        $result .= fread($fp, 1024);

    fclose($fp);

    return $result;

}

?>

roelof
24-Jul-2007 07:06


I modified the below version of legolas558 at users dot sausafe dot net and added a wrapping option.



<?php

/**

 *    Codeer een String naar zogenaamde 'quoted printable'. Dit type van coderen wordt

 *    gebruikt om de content van 8 bit e-mail berichten als 7 bits te versturen.

 *

 *    @access public

 *    @param string    $str    De String die we coderen

 *    @param bool      $wrap   Voeg linebreaks toe na 74 tekens?

 *    @return string

 */



function quoted_printable_encode($str, $wrap=true)

{

    $return = '';

    $iL = strlen($str);

    for($i=0; $i<$iL; $i++)

    {

        $char = $str[$i];

        if(ctype_print($char) && !ctype_punct($char)) $return .= $char;

        else $return .= sprintf('=%02X', ord($char));

    }

    return ($wrap === true)

        ? wordwrap($return, 74, " =\n")

        : $return;

}



?>

legolas558 at users dot sausafe dot net
21-Feb-2007 11:09


As soletan at toxa dot de reported, that function is very bad and does not provide valid enquoted printable strings. While using it I saw spam agents marking the emails as QP_EXCESS and sometimes the email client did not recognize the header at all; I really lost time :(. This is the new version (we use it in the Drake CMS core) that works seamlessly:



<?php



//L: note $encoding that is uppercase

//L: also your PHP installation must have ctype_alpha, otherwise write it yourself

function quoted_printable_encode($string, $encoding='UTF-8') {

// use this function with headers, not with the email body as it misses word wrapping

       $len = strlen($string);

       $result = '';

       $enc = false;

       for($i=0;$i<$len;++$i) {

        $c = $string[$i];

        if (ctype_alpha($c))

            $result.=$c;

        else if ($c==' ') {

            $result.='_';

            $enc = true;

        } else {

            $result.=sprintf("=%02X", ord($c));

            $enc = true;

        }

       }

       //L: so spam agents won't mark your email with QP_EXCESS

       if (!$enc) return $string;

       return '=?'.$encoding.'?q?'.$result.'?=';

}



I hope it helps ;)



?>

soletan at toxa dot de
20-Feb-2007 03:54


Be warned! The method below for encoding text does not work as requested by RFC1521!



Consider a line consisting of 75 'A' and a single

quoted_printable_decode

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