Re: [PHP] RE: RE: Sending MIME emails with base64 encoded attachments

[Analysis and Solutions]

Hey Petr:

> 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 (\\)

WAIT A SECOND!  You've got the magic_quotes_runtime configuration variable
turned on!  To solve your problem you can:

a) turn off that feature via the the php.ini or .htaccess file
   http://www.php.net/manual/en/configuration.php#ini.magic-quotes-runtime

OR

b) use stripslashes() on the string you get back from the file
   http://www.php.net/manual/en/function.stripslashes.php 

Enjoy,

--Dan

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[PHP] RE: RE: Sending MIME emails with base64 encoded attachments

[Svarc, Petr]

Title: RE: RE: Sending MIME emails with base64 encoded attachments





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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