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Bug #47164 uncomfortable (binary)char() append to binary string
Submitted: 2009-01-20 10:59 UTC Modified: 2010-06-13 19:01 UTC
From: lunter at interia dot pl Assigned: scottmac (profile)
Status: Wont fix Package: Unicode Engine related
PHP Version: 6CVS-2009-01-20 (snap) OS: *
Private report: No CVE-ID: None
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 [2009-01-20 10:59 UTC] lunter at interia dot pl
Description:
------------
uncomfortable (binary)char() append to a binary string

Reproduce code:
---------------
$b=(binary)'';

$b.=chr(255);
$b.=chr(254);
$b.=chr(253);
$b.=chr(252);
$b.=chr(251);
...
$b.=chr(0);

Expected result:
----------------
detect $b type as binary string and adding chr() in binary mode

like this:

$b=(binary)'';

$b.=(binary)chr(255);
$b.=(binary)chr(254);
$b.=(binary)chr(253);
$b.=(binary)chr(252);
$b.=(binary)chr(251);
...
$b.=(binary)chr(0);

Actual result:
--------------
adding chr() in unicode

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 [2009-01-21 11:12 UTC] johannes@php.net
Actually we need a function doing "binary chr" - chr() in PHP 6 takes a codepoint not the byte value, so  (binary)chr($c) will give the wrong result.
 [2009-01-21 11:26 UTC] johannes@php.net
$b = sprintf("%c%c%c", 255, 254, 253);

should work, but having a simple function might still be helpful
 [2009-01-21 12:31 UTC] lunter at interia dot pl
johannes@php.net "(binary)chr($c) will give the wrong result"

hmmmmmmm....... try code above.

b1.dat consists utf-8 data
b2.dat consists binary chars 0 - 255 step 1, file length is correct - 256B & chars are correct...

<?
 if(substr(phpversion(),0,1)!='6'){trigger_error('only PHP 6',E_USER_ERROR);}

// unicode.semantics = off
// unicode.runtime_encoding = iso-8859-1
// unicode.script_encoding = utf-8
// unicode.output_encoding = utf-8
// unicode.from_error_mode = U_INVALID_SUBSTITUTE
// unicode.from_error_subst_char = 3f

 $b1=(binary)'';
 for($z=0;$z<256;$z++){$b1.=chr($z);}
 file_put_contents('b1.dat',$b1);

 $b2=(binary)'';
 for($z=0;$z<256;$z++){$b2.=(binary)chr($z);}
 file_put_contents('b2.dat',$b2);
?>
 [2009-01-21 16:24 UTC] johannes@php.net
Scott said he'd look into this :-)
 [2010-06-13 19:01 UTC] felipe@php.net
-Status: Assigned +Status: Wont fix
 
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