Premature end of script headers: php

[Stephen Woodbridge]

Hi Guys,

Anytime you start recompiling components it is a good idea to recompile 
all the components in the order that you would normally build things.

Like in the following order:

1) libraries
2) apache
3) php
4) mapserver and/or mapscript

If you change things at any level you need to rebuild all the items 
below it in the tree. For most cases, you can just do

make clean
make
make install

if you add or remove libraries then you probably want to redo you 
./configure scripts.

This is complex and infrequent enough that is REALLY pays off to build a 
script with the commands that you used last time so you can rebuild in a 
consistent and complete manner.

My $0.02, and I rarely have problems like that and I support systems on 
debian and freeBSD, over 10 in all.

-Steve W.

Donald Harter wrote:
> On Wed, 29 Dec 2004 11:33:11 -0500, Jeff Portwine <jdport at VERITIME.COM> wrote:
> 
> 
>>Premature end of script headers: php
>>
>>Has anybody come across this error before, or have any suggestions on what
>>it could mean or how to resolve it?    PHP definately works otherwise...
>>
>>Thanks for any suggestions.
>>
>>Regards,
>>Jeff
> 
> 
> I have been having this problem today.  I had my mapserv wroking and decided
> to rebuild some of the dependent programs such as apache, php and postgres.
> 
> For a while I got the following message:
> 
>  [Mon Jun 27 12:23:01 2005] [error] PHP Warning:  dl(): MapScript: Unable to
> initialize module\nModule compiled with module API=20020429, de
> bug=0, thread-safety=0\nPHP    compiled with module API=20020429, debug=1,
> thread-safety=0\nThese options need to match\n in /var/www/html/
> test_mapserv.php on line 11
> 
> I fixced this by recompiling php and mapserv without the debug options.  It
> seems that they did not see a match even though both were compiled with debug.
> 
> Then I got these errors:
> [Mon Jun 27 18:07:17 2005] [error] [client 127.0.0.1] Premature end of
> script headers: /var/www/cgi-bin/mapserv
> [Mon Jun 27 18:08:17 2005] [error] [client 127.0.0.1] Premature end of
> script headers: /var/www/cgi-bin/php
> 
> Each corresponds to the mapscript cgi program and php_mapscript.so
> I finally was able to get my cgi mapscript working again.  All I had to do
> was recompile without this option "--with-php=/ext2e/php-4.3.11". I don't
> have a mapscript version, but my cgi mapscript works again.  It seems that
> when this option gets selected, it corrupts the build of the cgi mapscript.
>  At one time I had both of them working.  I have found conflicting
> information on how to build PHP for mapscript. One says not to build it as a
> dynamic module.  Another person said he built it with the
> "--with-apxs=/usr/local/apache/bin/apxs " option.  Yet with that option PHP
> is not built as a standalone cgi program according to another person.
> 
> Here is what versions I am using and thier configure options:
> mapserver-4.4.2
>   $ ./configure --with-freetype=/usr/bin --with-png --with-jpeg --with-gd
> --with-proj --with-gdal=/usr/local/bin/gdal-config --with-postgis
> =/usr/local/pqsql/bin --with-xpm=/usr/X11R6/lib
> 
> There is an error in the makefile that is generated with the postgis option.
>    It generates a sole "-I" as a command line option. Also I had to add
> "-I/usr/local/pgsql/include" so that it could find some include files.
> 
> 
> postgresql-8.0.3
> ./configure -with-ssl
> 
> php-4.3.11
> ./configure  --without-mysql --with-pgsql -enable-force-cgi-redirect
> --with-cgi --without-debug
> 
> apache_1.3.33
> CFLAGS="-g" \
> ./configure \
> "--with-layout=RedHat" \
> "--enable-module=so" \
> 
> I would like to get my mapscript working again.
> I would appreciate any suggestions on how to get it working.
> Also I am looking for some techniques on how to troubleshoot/debug this.
> Before I took out the --with-php option in the mapserv config, I put a sleep
> statement in the main routine, and tried a printf statement.  I then tried
> to attach the process using gdb.  I wasn't able to trace the flow since it
> seemed to crash soon after and I could not get to a break point.
> 
> Here is what I got for that:
> (gdb) step
> Single stepping until exit from function sleep,
> which has no line number information.
> 0x0805109e in main ()
> (gdb)
> Single stepping until exit from function main,
> which has no line number information.
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x42080f40 in strncpy () from /lib/i686/libc.so.6
> (gdb) bt
> #0  0x42080f40 in strncpy () from /lib/i686/libc.so.6
> #1  0x0807e9a9 in msSetError ()
> 
> Perhaps If I had a suitable input file I could do something like this:
> 
> "gdb mapserv <inputfile"  Mapserv complains if it is executed on a command
> line.  Something similar could be done for php with php_mapscript.so.  Then
> perhaps someone could find out what is going on.
>