Probably the cause is that session file is opened in the text mode. Can anybody with Windows verify that?

I could not reproduce this, please provide a short code
fragment reproducing this behaviour...

well, I tiptoed through the ms documentation fopen and _open and according to them the default mode for the open operations is _O_TEXT. Unless it is explicitly overriden, then it is text mode.

Here is some sample code to reproduce the problem:
<? 
session_start();
session_register("beforeLF");
session_register("testVarLF");
session_register("testVarNoLF");

$beforeLF = "A string before that with linefeeds";
$testVarNoLF = "A string without linefeeds";
$testVarLF = "A string with linefeeds\nmore\nmore\n";

print "click <a href=\"test2.php\">here</a> to continue<br><br>";
?>
beforeLF:
<pre><?= $beforeLF ?></pre>
end;
<br><br>
testVarLF:
<pre><?= $testVarLF ?></pre>
end;
<br><br>
testVarNoLF:
<pre><?= $testVarNoLF ?></pre>
end;

in another file (in this case called test2.php):
<? 
session_start();
?>
beforeLF:
<pre><?= $beforeLF ?></pre>
end;
<br><br>
testVarLF:
<pre><?= $testVar ?></pre>
end of the output of the testVar
<br><br>
testVarNoLF:
<pre><?= $testVarNoLF ?></pre>
end;

On my system, the variables don't print out at all. However, if you comment out the $testVarLF variable in the first file, everything comes out fine. (except of course a value for that variable, because it is not set). Also, if you change it to not include newline characters, it works.

It is an issue of the session files being opened in text mode. I added | O_BINARY to all of the V_OPEN calls in files_mod.c and recompiled, and now the example I just posted works. (this is using the snapshot from yesterday morning). I don't know if this has any implications elsewhere, but it does work now.

thanks

It is an issue of the session files being opened in text mode. I added | O_BINARY to all of the V_OPEN calls in files_mod.c and recompiled, and now the example I just posted works. (this is using the snapshot from yesterday morning). I don't know if this has any implications elsewhere, but it does work now.

thanks

Well, that's bad. Session files should be opened in binary mode. If nobody fixes it, I'll fix it in couple of days.

Fixed in CVS.