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Using PHP4 with the Zeus Web Server
-----------------------------------
Zeus fully supports running PHP in combination with our webserver. A
significant improvement in PHP 4 is that you can now run PHP as an
ISAPI module, giving great performance benefits over traditional CGI
code.
Note that you will need to be running at least version 3.3.6 of the
webserver. If you are running an earlier version, please see our
website (http://www.zeus.com) for upgrade instructions.
To build the ISAPI version of PHP, start the configuration with:
./configure --with-zeus=/usr/local/zeus
Obviously, replace /usr/local/zeus with the location of where you have
installed Zeus on your machine. For PHP to build successfully, you
need to have 3.3.6 already installed, because the code relies on the
presence of header files provided with the latest version.
You may have to adjust the environment variable LDFLAGS and EXTRA_LIBS
in order to link in extra libraries. This depends on the platform on
which you are building and also on the compiler used (see below). A
standard GNU/Linux install with GCC should build fine with no changes.
Configuring the webserver
-------------------------
After running 'make' and 'make install', you will have a 'libphp4.so'
file. Copy this file into a directory reserved for ISAPI
binaries. Now, perform the following steps for each virtual server
that you wish to run PHP on:
1) On the Admin server, go to 'edit server->path mapping'
2) Add an alias to the directory with libphp4.so in it, mapped to
/isapi/ (or a location of your choice). Make sure you set the alias
type to ISAPI.
3) Click 'update'
4) Add a handler for file extension 'php' to be run by /isapi/libphp4.so
5) Click 'update', then go back to the previous page.
6) Click on the 'module configuration' button, ensure that ISAPI
support is ticked.
7) Click on the ISAPI link. At the bottom of the page, click the
checkbox for running ISAPI extensions 'out of process'.
8) Click 'update'. Then restart the virtual server. Done!
Troubleshooting
---------------
*) Why does the compile fail at Zend/zend-scanner-cc.cc
or Zend/zend-parser.c ?
These source files are auto-generated from the corresponding .y files.
The default distribution of PHP contains pre-generated versions of these
files that have caused problems for some people. The simplest solution is
to delete the files. They will then be rebuilt correctly. You must have the
following GNU tools to do this:
bison 1.28 or later
flex 2.5.4 or later
*) Why does my PHP library fail to load?
After configuring Zeus, if you get a '502 Bad Gateway' error when
accessing a PHP page, there are problems loading the PHP
library. Check the error log ($ZEUSHOME/web/log/errors) for errors.
Failing to load the PHP ISAPI module is likely to be due to unresolved
symbols in the module. A way to check for this is to visit our support
page at http://support.zeus.com/faq/entries/isapi_error.html and run
the program there on your libphp4.so. It will list any unresolved
symbols.
*) My libphp4.so has unresolved symbols. How do I fix this?
You must ensure that the PHP build process links in the appropriate
libraries that contain these symbols! The libraries required will
depend on the platform you are running PHP on.
You may need to set one or two environment variables before running
the 'configure' program to set up PHP; LDFLAGS and EXTRA_LIBS. Make
sure that you also export these variables to the build process.
(Type 'export LDFLAGS EXTRA_LIBS' in the shell to do this.)
Specific examples:
Solaris + gcc:
Ensure you run ./configure with the `--enable-libgcc' parameter. You
may need to set LDFLAGS to '-L/usr/local/egcs/lib' (path depends on
your gcc installation)
FreeBSD 4.0:
Some people may find they need to run ./configure with the
'--enable-libgcc' compile option too.
For more information and help with Zeus, please visit our website:
http://www.zeus.com
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