FINAL SOLUTION!
Hello
Ok. It's me, the last time :-)
> Let say I have a small 4byte file with content "AB#0C"
> (ascii: #65,#66,#0,#67)
> I load it (using binary save fread into $txt)
> When I try to get third character (#0), quess what I get:
> $x = ord(substr($txt,2,1))
>
> $x IS NOT 0!
> $x IS 92, which mean backslash. Fourth char is 48, which
> means "0" and the fifth #67.
>
> So, PHP replaces any #0 with "\0" in every string internally.
OK. THIS is true just for string obtained by fread()
Strings created internally are OK.
So the solution is:
1) get the string from the file using $str=fread($file,filesize($filename));
2) I realize that in string obtained by fread() the following characters are changed:
#0 () -> #92#48 (\0)
#34 (") -> #92#34 (\")
#39 (') -> #92#39 (\')
#92 (\) -> #92#92 (\\)
3) So solution is before put text into base64_encode procedure, do the following:
$str=str_replace(chr(92).chr(48),chr(0),$str);
$str=str_replace(chr(92).chr(34),chr(34),$str);
$str=str_replace(chr(92).chr(39),chr(39),$str);
$str=str_replace(chr(92).chr(92),chr(92),$str);
4) Now you can encode it.
It works.
Futhermore, I was trying to store some string to file using fwrite() method.
fwrite() works fine for all characters except backslash, where you have to
send there double backslash.
So fwrite($file,chr(0)) writes really #0,
but for writing #92 you have to call fwrite($file,chr(92).chr(92));
For writing #0 you can also call fwrite($file,chr(92).chr(48));
( and similary for all four cases stated above in point 3) )
So, a thing, that's all for now
Have a nice day...
Petr Svarc
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