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quotemeta printf

Last updated: Fri, 26 Jan 2007

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# quoted_printable_decode

(PHP 3 >= 3.0.6, PHP 4, PHP 5)

quoted_printable_decode -- Раскодирует строку, закодированную методом quoted printable

## Описание

string quoted_printable_decode ( string str )

Возращает строку, полученную декодированием `str` методом quoted printable. Эта функция подобна функции imap_qprint(), но не требует для своей работы модуля IMAP.

add a note User Contributed Notes
quoted_printable_decode
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?'.$result.'?=';
}
I hope it helps ;)
?>`
soletan at toxa dot de
20-Feb-2007 03:54
`Be warned! The method below for encoding text does not work as requested by RFC1521!
Consider a line consisting of 75 'A' and a single é (or similar non-ASCII character) ... the method below would encode and return a line of 78 octets, breaking with RFC 1521, 5.1 Rule #5: "The Quoted-Printable encoding REQUIRES that encoded lines be no more than 76 characters long."
Good QP-encoding takes a bit more than this.`
legolas558
12-Feb-2007 10:32
`Please note that in the below encode function there is a bug!
<?php
if (($c==0x3d) || ($c>=0x80) || ($c<0x20))
?>
$c should be checked against less or equal to encode spaces!
so the correct code is
<?php
if (($c==0x3d) || ($c>=0x80) || ($c<=0x20))
?>
Fix the code or post this note, please`
MagicalTux at ookoo dot org
06-Feb-2007 03:44
`I checked Thomas Pequet / Memotoo.com's quoted_printable_encode() function, and it's rather non-respective to standards...
Here's my own, fixed version :
<?php
function quoted_printable_encode($string, $linelen = 0, $linebreak="=\r\n", $breaklen = 0, $encodecrlf = false) {
// Quoted printable encoding is rather simple.
// Each character in the string $string should be encoded if:
// Character code is <0x20 (space)
// Character is = (as it has a special meaning: 0x3d)
// Character is over ASCII range (>=0x80)
$len = strlen($string);
$result = '';
for($i=0;$i<$len;$i++) {
if ($linelen >= 76) { // break lines over 76 characters, and put special QP linebreak
$linelen = $breaklen;
$result.= $linebreak;
}
$c = ord($string[$i]);
if (($c==0x3d) || ($c>=0x80) || ($c<0x20)) { // in this case, we encode...
if ((($c==0x0A) || ($c==0x0D)) && (!$encodecrlf)) { // but not for linebreaks
$result.=chr($c);
$linelen = 0;
continue;
}
$result.='='.str_pad(strtoupper(dechex($c)), 2, '0');
$linelen += 3;
continue;
}
$result.=chr($c); // normal characters aren't encoded
$linelen++;
}
return $result;
}
$test = 'This is a test !! héhéhé ....'."\r\n";
$test.= 'You can write really long pieces of text without having to worry about mail transfert. Quoted printable supports special way to handle such lines, by instering an escaped linebreak. This linebreak, once converted back to 8bit, will disappear.';
echo quoted_printable_encode(utf8_encode($test))."\r\n";
?>
By default, the function encodes text to be used as a quoted-printable-encoded body, however by tweaking the parameters, you can get subject-header encoding and stuff like that.`
Thomas Pequet / Memotoo.com
19-Oct-2006 06:15
`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'été ?"))
-> "c'est quand l'=C3=A9t=C3=A9 ?"`
umu
06-Feb-2006 02:38
`...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
22-Jul-2005 02:08
`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 01:08
`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, $aMatch[0] );
}
?>`
dmitry at koterov dot ru
19-Feb-2005 05:26
`Previous comment has a bug: encoding of short test does not work because of incorrect usage of preg_match_all(). Have somebody read it at all? :-)
Correct version (seems), with additional imap_8bit() function emulation:
if (!function_exists('imap_8bit')) {
function imap_8bit($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 03:32
`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 07:46
`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($output);
}`
pinkpanther at swissonline dot ch
05-Jan-2003 03:31
`Sorry, above I mixed up QP-Decode and UrlDecode, the example I gave above is in fact UrlDecode:
function UrlDecode($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'))", $string);
}
f.e. replaces '=20' with ' '`
pob at medienrecht dot NOSPAM dot org
18-Jul-2001 01:06
`If you do not have access to imap_* and do not want to use
�$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 $encoded;`
madmax at express dot ru
03-Aug-2000 05:41
`Some browser (netscape, for example)
send 8-bit quoted printable text like this:
=C5=DD=A3=D2=C1= =DA
"= =" means continuos word.
php function not detect this situations and translate in string like:
abcde=f`
gustavf at spamstop dot com
07-Jul-2000 10:25
`This function does not recognize lowercase letters as part of the Quoted Printable encoding. RFC 1521 specifies:
Uppercase letters must be used when sending hexadecimal data, though a robust implementation may choose to recognize lowercase letters on receipt.`
thomas at kenne dot dk
12-Apr-2000 04:09
`Try the imap_8bit function, for converting an 8bit string to a quotad printable string.`
sunil at nanjang dot com
11-Oct-1999 07:52
`hi. i'm php developer in korean.
quoted print decode works well,
but <font color=blue>quoted_printable_decode(str_replace("=\r\n","",$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,..`
add a note
quotemeta printf

Last updated: Fri, 26 Jan 2007
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