I upgraded my server from Apache 1.3.20 and PHP 4.0.6 to 
Apache 2.0.44 and PHP 4.3.1.  Now my app which was working 
does not, and I can't figure out why. 
 
The code generating output is simply this: 
 
header("Content-type: application/pdf"); 
$bytes = @readfile($fulldoc); 
 
Those two lines are back-to-back, and the "header" has to be 
first or I would get an error, so I know there's nothing else in the 
output stream. 
 
With Mozilla there are no problems, but with MSIE the PDF 
document will load once then on subsequent reloads it displays 
"### sec.<br>" ("###" being an integer) before file's actual 
content.  This causes MSIE to display the unformatted (raw) 
content of the PDF file. 
 
Apparently this is showing the number of seconds for 
something?  If I keep clicking back-arrow then reload the PDF 
file, the number of seconds keeps increasing.  Once 60 
seconds has elapsed since the first load, it again loads 
properly.  So I can go back-and-forth (back-arrow, click the 
document, back-arrow, click the document) and watch the 
seconds rise, then it reaches 60 and the document again 
displays properly using Acrobat. 
 
I've tried readfile() with "@" and with & without assigning result 
to a variable; no difference. 
 
I am running a mostly "stock" PHP.INI file copied from the 
"recommended" distribution file -- I just changed "safe_mode" to 
and "expose_php" to "Off" and "register_globals" to "On". 
 
My configure line is as follows: 
 
./configure --prefix=/usr/share --datadir=/usr/share/php 
--bindir=/usr/bin --libdir=/usr/share --with-config-file-path=/etc 
--with-exec-dir=/usr/lib/php/bin --with-mysql=/usr --with-gd=yes 
--enable-gd-native-ttf --enable-gd-imgstrttf --with-tiff-dir=/usr 
--with-jpeg-dir=/usr --with-png-dir=/usr 
--with-xpm-dir=/usr/X11R6 --with-zlib=yes --with-bz2 --with-gmp 
--with-xml --with-ttf --with-t1lib --with-mcal=/usr --with-imap=yes 
--with-sablot --with-readline --with-ftp --with-ndbm --with-gdbm 
--with-mcrypt --with-gettext --with-mm --with-gd=yes 
--enable-versioning --enable-yp --enable-bcmath 
--enable-trans-sid --enable-inline-optimization 
--enable-track-vars --enable-magic-quotes --enable-safe-mode 
--enable-sockets --enable-sysvsem --enable-sysvshm 
--enable-calendar --enable-ftp --enable-memory-limit 
--enable-force-cgi-redirect --with-openssl --with-curl 
--with-imap-ssl --with-gd=yes 
--with-apxs2=/usr/local/apache2/bin/apxs --with-snmp 
--disable-ipv6 --with-pear 
 
Thank you in advance for any help in solving this.