ID: 27573
User updated by: ib at wupperonline dot de
Reported By: ib at wupperonline dot de
Status: Bogus
Bug Type: Documentation problem
Operating System: Windows 2000
PHP Version: 4.3.4
New Comment:
Why is fopen mode "r" working in binary mode more portable?
It would be more portable if I could use the same mode ("r") on all
platforms - as text mode (which is, for example, what the gcc port for
Windows does as well). There is already a special mode ("rb") for
systems distinguishing between the modes (which is well documented,
even for POSIX fopen, if I remember well). No need for another ("rt")
one.
Previous Comments:
------------------------------------------------------------------------
[2004-03-11 13:34:45] [EMAIL PROTECTED]
ah, already documented then :-)
------------------------------------------------------------------------
[2004-03-11 13:32:13] [EMAIL PROTECTED]
That is correct; fopen was changed to work in binary mode by default in
order to be more portable.
I thought this was mentioned in the NEWS file, but apparently not.
The change was made in PHP 4.3.2.
The undocumented 't' mode has been a feature of the MSVCRT
since forever.
This stuff needs documenting fairly prominently.
------------------------------------------------------------------------
[2004-03-11 13:27:57] [EMAIL PROTECTED]
>From http://www.php.net/fopen
Windows offers a text-mode translation flag ('t') which will
transparently translate \n to \r\n when working with the file. In
contrast, you can also use 'b' to force binary mode, which will not
translate your data. To use these flags, specify either 'b' or 't' as
the last character of the mode parameter.
As of PHP 4.3.2, the default mode is set to binary for all platforms
that distinguish between binary and text mode. If you are having
problems with your scripts after upgrading, try using the 't' flag as a
workaround until you have made your script more portable as mentioned
above.
------------------------------------------------------------------------
[2004-03-11 12:31:46] ib at wupperonline dot de
Description:
------------
Using mode "r" to fopen files under Windows doesn't open them in text
mode (as it should), but in binary mode, thus working exactly like
"rb". Reading these files, you'll get "\r\n" instead of "\n" for new
line character.
Surprisingly, fopen accepts mode "rt" which isn't documented but works
as "r" should. It opens in text mode and returns "\n" instead of
"\r\n".
Reproduce code:
---------------
Create a file named dat.txt containing 4 bytes: "1", CR, LF, "2", LF.
$f = fopen("dat.txt", "r");
$d = fread($f, 1);
echo ord($d) . " ";
$d = fread($f, 1);
echo ord($d) . " ";
$d = fread($f, 1);
echo ord($d) . " ";
$d = fread($f, 1);
echo ord($d) . " ";
fclose($f);
Expected result:
----------------
49 10 50 10
Actual result:
--------------
49 13 10 50
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=27573&edit=1
