Imported Upstream version 5.1.2upstream/5.1.2

1 files changed, 645 insertions, 83 deletions

diff --git a/INSTALL b/INSTALL
index be2cac112..957b6fac4 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,4 +1,3 @@
-
 Installing PHP
      _________________________________________________________________
 
@@ -17,6 +16,7 @@ Installing PHP
         OpenBSD installation notes
         Solaris specific installation tips
         Gentoo installation notes
+        Debian GNU/Linux installation notes
 
    3. Installation on Mac OS X
 
@@ -43,6 +43,8 @@ Installing PHP
 
         The configuration file
         How to change configuration settings
+
+   7. Installation FAQ
      _________________________________________________________________
 
 Preface
@@ -164,7 +166,7 @@ Apache 1.3.x on Unix systems
    your files.
 
    Example 2-1. Installation Instructions (Apache Shared Module Version)
-   for PHP 
+   for PHP
 1.  gunzip apache_xxx.tar.gz
 2.  tar -xvf apache_xxx.tar
 3.  gunzip php-xxx.tar.gz
@@ -248,14 +250,14 @@ Apache 1.3.x on Unix systems
    Alternatively, to install PHP as a static object:
 
    Example 2-2. Installation Instructions (Static Module Installation for
-   Apache) for PHP 
+   Apache) for PHP
 1.  gunzip -c apache_1.3.x.tar.gz | tar xf -
 2.  cd apache_1.3.x
 3.  ./configure
 4.  cd ..
 
-5.  gunzip -c php-4.x.y.tar.gz | tar xf -
-6.  cd php-4.x.y
+5.  gunzip -c php-5.x.y.tar.gz | tar xf -
+6.  cd php-5.x.y
 7.  ./configure --with-mysql --with-apache=../apache_1.3.x
 8.  make
 9.  make install
@@ -269,15 +271,17 @@ Apache 1.3.x on Unix systems
 12. make
     (you should now have an httpd binary which you can copy to your Apache bin
 dir if
-    is is your first install then you need to "make install" as well)
+    it is your first install then you need to "make install" as well)
 
-13. cd ../php-4.x.y
+13. cd ../php-5.x.y
 14. cp php.ini-dist /usr/local/lib/php.ini
 
 15. You can edit /usr/local/lib/php.ini file to set PHP options.
     Edit your httpd.conf or srm.conf file and add:
     AddType application/x-httpd-php .php
 
+     Note: Replace php-5 by php-4 and php5 by php4 in PHP 4.
+
    Depending on your Apache install and Unix variant, there are many
    possible ways to stop and restart the server. Below are some typical
    lines used in restarting the server, for different apache/unix
@@ -309,13 +313,13 @@ stop and start:
 
    ./configure --with-apxs --with-pgsql
 
-   This will create a libphp5.so shared library that is loaded into
-   Apache using a LoadModule line in Apache's httpd.conf file. The
-   PostgreSQL support is embedded into this libphp5.so library.
+   This will create a libphp5.so (or libphp4.so in PHP 4) shared library
+   that is loaded into Apache using a LoadModule line in Apache's
+   httpd.conf file. The PostgreSQL support is embedded into this library.
 
    ./configure --with-apxs --with-pgsql=shared
 
-   This will create a libphp5.so shared library for Apache, but it will
+   This will create a libphp4.so shared library for Apache, but it will
    also create a pgsql.so shared library that is loaded into PHP either
    by using the extension directive in php.ini file or by loading it
    explicitly in a script using the dl() function.
@@ -327,9 +331,9 @@ stop and start:
    in the Apache source tree. Then you compile Apache using
    --activate-module=src/modules/php5/libphp5.a and the Apache build
    system will create libphp5.a and link it statically into the httpd
-   binary. The PostgreSQL support is included directly into this httpd
-   binary, so the final result here is a single httpd binary that
-   includes all of Apache and all of PHP.
+   binary (replace php5 by php4 in PHP 4). The PostgreSQL support is
+   included directly into this httpd binary, so the final result here is
+   a single httpd binary that includes all of Apache and all of PHP.
 
    ./configure --with-apache=/path/to/apache_source --with-pgsql=shared
 
@@ -403,7 +407,7 @@ Apache 2.0 on Unix systems
    files.
 
    Example 2-4. Installation Instructions (Apache 2 Shared Module
-   Version) 
+   Version)
 1.  gzip -d httpd-2_0_NN.tar.gz
 2.  tar xvf httpd-2_0_NN.tar
 3.  gunzip php-NN.tar.gz
@@ -461,11 +465,11 @@ Apache 2.0 on Unix systems
 
     For PHP 4:
 
-      LoadModule php4_module libexec/libphp4.so
+      LoadModule php4_module modules/libphp4.so
 
     For PHP 5:
 
-      LoadModule php5_module libexec/libphp5.so
+      LoadModule php5_module modules/libphp5.so
 
 15. Tell Apache to parse certain extensions as PHP.  For example,
     let's have Apache parse the .php extension as PHP.  You could
@@ -1097,6 +1101,121 @@ Common Problems
        "Apache PHP".
      _________________________________________________________________
 
+Debian GNU/Linux installation notes
+
+   This section contains notes and hints specific to installing PHP on
+   Debian GNU/Linux.
+     _________________________________________________________________
+
+Using APT
+
+   While you can just download the PHP source and compile it yourself,
+   using Debian's packaging system is the simplest and cleanest method of
+   installing PHP. If you are not familiar with building software on
+   Linux, this is the way to go.
+
+   The first decision you need to make is whether you want to install
+   Apache 1.3.x or Apache 2.x. The corresponding PHP packages are
+   respectively named libapache-mod-php* and libapache2-mod-php*. The
+   steps given below will use Apache 1.3.x. Please note that, as of this
+   writing, there is no official Debian packages of PHP 5. Then the steps
+   given below will install PHP 4.
+
+   PHP is available in Debian as CGI or CLI flavour too, named
+   respectively php4-cgi and php4-cli. If you need them, you'll just have
+   to reproduce the following steps with the good package names. Another
+   special package you'd want to install is php4-pear. It contains a
+   minimal PEAR installation and the pear commandline utility.
+
+   If you need more recent packages of PHP than the Debian's stable ones
+   or if some PHP modules lacks the Debian official repository, perhaps
+   you should take a look at http://www.apt-get.org/. One of the results
+   found should be Dotdeb. This unofficial repository is maintained by
+   Guillaume Plessis and contains Debian packages of the most recent
+   versions of PHP 4 and PHP 5. To use it, just add the to following two
+   lines to your /etc/apt/sources.lists and run apt-get update :
+
+   Example 2-10. The two Dotdeb related lines
+deb http://packages.dotdeb.org stable all
+deb-src http://packages.dotdeb.org stable all
+
+   The last thing to consider is whether your list of packages is up to
+   date. If you have not updated it recently, you need to run apt-get
+   update before anything else. This way, you will be using the most
+   recent stable version of the Apache and PHP packages.
+
+   Now that everything is in place, you can use the following example to
+   install Apache and PHP:
+
+   Example 2-11. Debian Install Example with Apache 1.3
+   # apt-get install libapache-mod-php4
+
+   APT will automatically install the PHP 4 module for Apache 1.3, and
+   all its dependencies and then activate it. If you're not asked to
+   restart Apache during the install process, you'll have to do it
+   manually :
+
+   Example 2-12. Stopping and starting Apache once PHP 4 is installed
+# /etc/init.d/apache stop
+# /etc/init.d/apache start
+     _________________________________________________________________
+
+Better control on configuration
+
+   In the last section, PHP was installed with only core modules. This
+   may not be what you want and you will soon discover that you need more
+   activated modules, like MySQL, cURL, GD, etc.
+
+   When you compile PHP from source yourself, you need to activate
+   modules via the configure command. With APT, you just have to install
+   additional packages. They're all named 'php4-*' (or 'php5-*' if you
+   installed PHP 5 from a third party repository).
+
+   Example 2-13. Getting the list of PHP additional packages
+   # dpkg -l 'php4-*'
+
+   As you can see from the last output, there's a lot of PHP modules that
+   you can install (excluding the php4-cgi, php4-cli or php4-pear special
+   packages). Look at them closely and choose what you need. If you
+   choose a module and you do not have the proper libraries, APT will
+   automatically install all the dependencies for you.
+
+   If you choose to add the MySQL, cURL and GD support to PHP the command
+   will look something like this:
+
+   Example 2-14. Install PHP with MySQL, cURL and GD
+   # apt-get install php4-mysql php4-curl php4-gd
+
+   APT will automatically add the appropriate lines to your different
+   php.ini (/etc/php4/apache/php.ini, /etc/php4/cgi/php.ini, etc).
+
+   Example 2-15. These lines activate MySQL, cURL and GD into PHP
+extension=mysql.so
+extension=curl.so
+extension=gd.so
+
+   You'll only have to stop/start Apache as previously to activate the
+   modules.
+     _________________________________________________________________
+
+Common Problems
+
+     * If you see the PHP source instead of the result the script should
+       produce, APT has probably not included /etc/apache/conf.d/php4 in
+       your Apache 1.3 configuration. Please ensure that the following
+       line is present in your /etc/apache/httpd.conf file then
+       stop/start Apache:
+
+   Example 2-16. This line activates PHP 4 into Apache
+# Include /etc/apache/conf.d/
+
+     * If you installed an additional module and if its functions are not
+       available in your scripts, please ensure that the appropriate line
+       is present in your php.ini, as seen before. APT may fail during
+       the installation of the additional module, due to a confusing
+       debconf configuration.
+     _________________________________________________________________
+
 Chapter 3. Installation on Mac OS X
 
    This section contains notes and hints specific to installing PHP on
@@ -1119,7 +1238,7 @@ Using Packages
 
 Compiling for OS X Server
 
-   Mac OS X Server install. 
+   Mac OS X Server install.
 
     1. Get the latest distributions of Apache and PHP.
     2. Untar them, and run the configure program on Apache like so.
@@ -1221,24 +1340,24 @@ Chapter 4. Installation of PECL extensions
 
 Introduction to PECL Installations
 
-   PHP extensions may be installed in a variety of ways. PECL is a
-   repository of PHP extensions living within the PEAR structure, and the
-   following demonstrates how to install these extensions.
+   PECL is a repository of PHP extensions that are made available to you
+   via the PEAR packaging system. This section of the manual is intended
+   to demonstrate how to obtain and install PECL extensions.
 
    These instructions assume /your/phpsrcdir/ is the path to the PHP
-   source, and extname is the name of the PECL extension. Adjust
-   accordingly. These instructions also assume a familiarity with the
-   pear command.
-
-   Shared extensions may be installed by including them inside of php.ini
-   using the extension PHP directive. See also the extensions_dir
-   directive, and dl(). The installation methods described below do not
-   automatically configure PHP to include these extensions, this step
-   must be done manually.
-
-   When building PHP modules, it's important to have the appropriate
-   versions of the required tools (autoconf, automake, libtool, etc.) See
-   the Anonymous CVS Instructions for details on the required tools, and
+   source distribution, and that extname is the name of the PECL
+   extension. Adjust accordingly. These instructions also assume a
+   familiarity with the pear command.
+
+   To be useful, a shared extension must be built, installed, and loaded.
+   The methods described below provide you with various instructions on
+   how to build and install the extensions, but they do not automatically
+   load them. Extensions can be loaded by adding an extension directive.
+   To this php.ini file, or through the use of the dl() function.
+
+   When building PHP modules, it's important to have known-good versions
+   of the required tools (autoconf, automake, libtool, etc.) See the
+   Anonymous CVS Instructions for details on the required tools, and
    required versions.
      _________________________________________________________________
 
@@ -1247,16 +1366,19 @@ Downloading PECL extensions
    There are several options for downloading PECL extensions, such as:
 
      * http://pecl.php.net
-       Listed here is information like the ChangeLog, release
-       information, requirements, revisions, etc. Although not every PECL
-       extension has a webpage, most do.
+       The PECL web site contains information about the different
+       extensions that are offered by the PHP Development Team. The
+       information available here includes: ChangeLog, release notes,
+       requirements and other similar details.
      * pear download extname
-       The pear command may also be used to download source files.
+       PECL extensions that have releases listed on the PECL web site are
+       available for download and installation using the pear command.
        Specific revisions may also be specified.
      * CVS
-       All PECL files reside in CVS. A web-based view may be seen at
-       http://cvs.php.net/pecl/. To download straight from CVS, consider
-       the following where phpfi is the password for user cvsread:
+       Most PECL extensions also reside in CVS. A web-based view may be
+       seen at http://cvs.php.net/pecl/. To download straight from CVS,
+       the following sequence of commands may be used. Note that phpfi is
+       the password for user cvsread:
 
 $ cvs -d:pserver:cvsread@cvs.php.net:/repository login
 $ cvs -d:pserver:cvsread@cvs.php.net:/repository co pecl/extname
@@ -1270,9 +1392,10 @@ $ cvs -d:pserver:cvsread@cvs.php.net:/repository co pecl/extname
 
 PECL for Windows users
 
-   Like with any other PHP extension DLL, to install move the PECL
-   extension DLLs into the extension_dir folder and include them within
-   php.ini. For example:
+   As with any other PHP extension DLL, installation is as simple as
+   copying the PECL extension DLLs into the extension_dir folder and
+   loading them from php.ini. For example, add the following line to your
+   php.ini:
 
    extension=php_extname.dll
 
@@ -1286,67 +1409,76 @@ Compiling shared PECL extensions with PEAR
 
    $ pear install extname
 
-   That will download the source for extname, and compile it on the
-   system. This results in an extname.so file that may then be included
-   in php.ini
+   This will download the source for extname, compile, and install
+   extname.so into your extension_dir. extname.so may then be loaded via
+   php.ini
 
-   In case the systems preferred_state is set higher than an available
-   extname version, like it's set to stable and the extension is still in
-   beta, either alter the preferred_state via pear config-set or specify
-   a specific version of the PECL extension. For example:
+   By default, the pear command will not install packages that are marked
+   with the alpha or beta state. If no stable packages are available, you
+   may install a beta package using the following command:
 
-   $ pear install extname-0.1.1
+   $ pear install extname-beta
 
-   Regardless, pear will copy this extname.so into the extensions
-   directory. Adjust php.ini accordingly.
+   You may also install a specific version using this variant:
+
+   $ pear install extname-0.1
      _________________________________________________________________
 
 Compiling shared PECL extensions with phpize
 
-   If using pear is not an option, like for building shared PECL
-   extensions from CVS, or for unreleased PECL packages, then creating a
-   shared extension may also be done by manually using the phpize
-   command. The pear command essentially does this but it may also be
-   done manually. Assuming the source file is named extname.tgz, and that
-   it was downloaded into the current directory, consider the following:
+   Sometimes, using the pear installer is not an option. This could be
+   because you're behind a firewall, or it could be because the extension
+   you want to install is not available as a PEAR compatible package,
+   such as unreleased extensions from CVS. If you need to build such an
+   extension, you can use the lower-level build tools to perform the
+   build manually.
+
+   The phpize command is used to prepare the build environment for a PHP
+   extension. In the following sample, the sources for an extension are
+   in a directory named extname:
 
-$ pear download extname
-$ gzip -d < extname.tgz | tar -xvf -
 $ cd extname
 $ phpize
-$ ./configure && make
+$ ./configure
+$ make
+# make install
 
-   Upon success, this will create extname.so and put it into the modules/
-   and/or .libs/ directory within the extname/ source. Move this shared
-   extension (extname.so) into the PHP extensions directory, and adjust
-   php.ini accordingly.
+   A successful install will have created extname.so and put it into the
+   PHP extensions directory. You'll need to and adjust php.ini and add an
+   extension=extname.so line before you can use the extension.
      _________________________________________________________________
 
 Compiling PECL extensions statically into PHP
 
-   To statically include the extension within the PHP build, put the
-   extensions source into the ext/ directory found in the PHP source. For
-   example:
+   You might find that you need to build a PECL extension statically into
+   your PHP binary. To do this, you'll need to place the extension source
+   under the php-src/ext/ directory and tell the PHP build system to
+   regenerate its configure script.
 
 $ cd /your/phpsrcdir/ext
 $ pear download extname
 $ gzip -d < extname.tgz | tar -xvf -
 $ mv extname-x.x.x extname
-$ rm package.xml
 
    This will result in the following directory:
 
    /your/phpsrcdir/ext/extname
 
-   From here, build PHP as normal:
+   From here, force PHP to rebuild the configure script, and then build
+   PHP as normal:
 
 $ cd /your/phpsrcdir
-$ ./buildconf
+$ rm configure
+$ ./buildconf --force
 $ ./configure --help
 $ ./configure --with-extname --enable-someotherext --with-foobar
 $ make
 $ make install
 
+     Note: To run the 'buildconf' script you need autoconf 2.13 and
+     automake 1.4+ (newer versions of autoconf may work, but are not
+     supported).
+
    Whether --enable-extname or --with-extname is used depends on the
    extension. Typically an extension that does not require external
    libraries uses --enable. To be sure, run the following after
@@ -1403,14 +1535,23 @@ The configuration file
    versions of PHP, this happens only once when the web server is
    started. For the CGI and CLI version, it happens on every invocation.
 
-   The default location of php.ini is a compile time option (see the FAQ
-   entry), but can be changed for the CGI and CLI version with the -c
-   command line switch, see the chapter about using PHP from the command
-   line. You can also use the environment variable PHPRC for an
-   additional path to search for a php.ini file.
+   php.ini is searched in these locations (in order):
+
+     * SAPI module specific location (PHPIniDir directive in Apache 2, -c
+       command line option in CGI and CLI, php_ini parameter in NSAPI,
+       PHP_INI_PATH environment variable in THTTPD)
+     * HKEY_LOCAL_MACHINE\SOFTWARE\PHP\IniFilePath (Windows Registry
+       location)
+     * The PHPRC environment variable
+     * Current working directory (for CLI)
+     * The web server's directory (for SAPI modules), or directory of PHP
+       (otherwise in Windows)
+     * Windows directory (C:\windows or C:\winnt) (for Windows), or
+       --with-config-file-path compile time option
 
    If php-SAPI.ini exists (where SAPI is used SAPI, so the filename is
    e.g. php-cli.ini or php-apache.ini), it's used instead of php.ini.
+   SAPI name can be determined by php_sapi_name().
 
      Note: The Apache web server changes the directory to root at
      startup causing PHP to attempt to read php.ini from the root
@@ -1418,11 +1559,11 @@ The configuration file
 
    The php.ini directives handled by extensions are documented
    respectively on the pages of the extensions themselves. The list of
-   the core directives is available in the appendix. Probably not all the
-   PHP directives are documented in the manual though. For a completel
-   list of directives available in your PHP version, please read your
-   well commented php.ini file. Alternatively, you may find the the
-   latest php.ini from CVS helpful too.
+   the core directives is available in the appendix. Probably not all PHP
+   directives are documented in the manual though. For a complete list of
+   directives available in your PHP version, please read your well
+   commented php.ini file. Alternatively, you may find the the latest
+   php.ini from CVS helpful too.
 
    Example 6-1. php.ini example
 ; any text on a line after an unquoted semicolon (;) is ignored
@@ -1438,6 +1579,10 @@ include_path = ".:/usr/local/lib/php"
 
 ; backslashes are treated the same as any other character
 include_path = ".;c:\php\lib"
+
+   Since PHP 5.1.0, it is possible to refer to existing .ini variables
+   from within .ini files. Example: open_basedir = ${open_basedir}
+   ":/new/dir".
      _________________________________________________________________
 
 How to change configuration settings
@@ -1533,3 +1678,420 @@ Other interfaces to PHP
    function, and review the resulting page. You can also access the
    values of individual configuration directives at runtime using
    ini_get() or get_cfg_var().
+     _________________________________________________________________
+
+Chapter 7. Installation FAQ
+
+   This section holds common questions about the way to install PHP. PHP
+   is available for almost any OS (except maybe for MacOS before OSX),
+   and almost any web server.
+
+   To install PHP, follow the instructions in the INSTALL file located in
+   the distribution. Windows users should also read the install.txt file.
+   There are also some helpful hints for Windows users here.
+
+   1. Why shouldn't I use Apache2 with a threaded MPM in a production
+          environment?
+
+   2. Unix/Windows: Where should my php.ini file be located?
+   3. Unix: I installed PHP, but every time I load a document, I get the
+          message 'Document Contains No Data'! What's going on here?
+
+   4. Unix: I installed PHP using RPMS, but Apache isn't processing the
+          PHP pages! What's going on here?
+
+   5. Unix: I installed PHP 3 using RPMS, but it doesn't compile with the
+          database support I need! What's going on here?
+
+   6. Unix: I patched Apache with the FrontPage extensions patch, and
+          suddenly PHP stopped working. Is PHP incompatible with the
+          Apache FrontPage extensions?
+
+   7. Unix/Windows: I have installed PHP, but when I try to access a PHP
+          script file via my browser, I get a blank screen.
+
+   8. Unix/Windows: I have installed PHP, but when try to access a PHP
+          script file via my browser, I get a server 500 error.
+
+   9. Some operating systems: I have installed PHP without errors, but
+          when I try to start apache I get undefined symbol errors:
+
+[mybox:user /src/php4] root# apachectl configtest
+ apachectl: /usr/local/apache/bin/httpd Undefined symbols:
+  _compress
+  _uncompress
+
+   10. Windows: I have installed PHP, but when I to access a PHP script
+          file via my browser, I get the error:
+
+cgi error:
+ The specified CGI application misbehaved by not
+ returning a complete set of HTTP headers.
+ The headers it did return are:
+
+   11. Windows: I've followed all the instructions, but still can't get
+          PHP and IIS to work together!
+
+   12. When running PHP as CGI with IIS, PWS, OmniHTTPD or Xitami, I get
+          the following error: Security Alert! PHP CGI cannot be accessed
+          directly..
+
+   13. How do I know if my php.ini is being found and read? It seems like
+          it isn't as my changes aren't being implemented.
+
+   14. How do I add my PHP directory to the PATH on Windows?
+   15. How do I make the php.ini file available to PHP on windows?
+   16. Is it possible to use Apache content negotiation (MultiViews
+          option) with PHP?
+
+   17. Is PHP limited to process GET and POST request methods only?
+
+   1. Why shouldn't I use Apache2 with a threaded MPM in a production
+   environment?
+
+   PHP is glue. It is the glue used to build cool web applications by
+   sticking dozens of 3rd-party libraries together and making it all
+   appear as one coherent entity through an intuitive and easy to learn
+   language interface. The flexibility and power of PHP relies on the
+   stability and robustness of the underlying platform. It needs a
+   working OS, a working web server and working 3rd-party libraries to
+   glue together. When any of these stop working PHP needs ways to
+   identify the problems and fix them quickly. When you make the
+   underlying framework more complex by not having completely separate
+   execution threads, completely separate memory segments and a strong
+   sandbox for each request to play in, feet of clay are introduced into
+   PHP's system.
+
+   If you feel you have to use a threaded MPM, look at a FastCGI
+   configuration where PHP is running in its own memory space.
+
+   And finally, this warning against using a threaded MPM is not as
+   strong for Windows systems because most libraries on that platform
+   tend to be threadsafe.
+
+   2. Unix/Windows: Where should my php.ini file be located?
+
+   By default on Unix it should be in /usr/local/lib which is
+   <install-path>/lib. Most people will want to change this at
+   compile-time with the --with-config-file-path flag. You would, for
+   example, set it with something like:
+   --with-config-file-path=/etc
+
+   And then you would copy php.ini-dist from the distribution to
+   /etc/php.ini and edit it to make any local changes you want.
+   --with-config-file-scan-dir=PATH
+
+   On Windows the default path for the php.ini file is the Windows
+   directory. If you're using the Apache webserver, php.ini is first
+   searched in the Apaches install directory, e.g. c:\program
+   files\apache group\apache. This way you can have different php.ini
+   files for different versions of Apache on the same machine.
+
+   See also the chapter about the configuration file.
+
+   3. Unix: I installed PHP, but every time I load a document, I get the
+   message 'Document Contains No Data'! What's going on here?
+
+   This probably means that PHP is having some sort of problem and is
+   core-dumping. Look in your server error log to see if this is the
+   case, and then try to reproduce the problem with a small test case. If
+   you know how to use 'gdb', it is very helpful when you can provide a
+   backtrace with your bug report to help the developers pinpoint the
+   problem. If you are using PHP as an Apache module try something like:
+
+     * Stop your httpd processes
+     * gdb httpd
+     * Stop your httpd processes
+     * > run -X -f /path/to/httpd.conf
+     * Then fetch the URL causing the problem with your browser
+     * > run -X -f /path/to/httpd.conf
+     * If you are getting a core dump, gdb should inform you of this now
+     * type: bt
+     * You should include your backtrace in your bug report. This should
+       be submitted to http://bugs.php.net/
+
+   If your script uses the regular expression functions (ereg() and
+   friends), you should make sure that you compiled PHP and Apache with
+   the same regular expression package. This should happen automatically
+   with PHP and Apache 1.3.x
+
+   4. Unix: I installed PHP using RPMS, but Apache isn't processing the
+   PHP pages! What's going on here?
+
+   Assuming you installed both Apache and PHP from RPM packages, you need
+   to uncomment or add some or all of the following lines in your
+   httpd.conf file:
+# Extra Modules
+AddModule mod_php.c
+AddModule mod_php3.c
+AddModule mod_perl.c
+
+# Extra Modules
+LoadModule php_module         modules/mod_php.so
+LoadModule php3_module        modules/libphp3.so     # for PHP 3
+LoadModule php4_module        modules/libphp4.so     # for PHP 4
+LoadModule perl_module        modules/libperl.so
+
+   And add:
+AddType application/x-httpd-php3 .php3    # for PHP 3
+AddType application/x-httpd-php .php      # for PHP 4
+
+   ... to the global properties, or to the properties of the
+   VirtualDomain you want to have PHP support added to.
+
+   5. Unix: I installed PHP 3 using RPMS, but it doesn't compile with the
+   database support I need! What's going on here?
+
+   Due to the way PHP 3 built, it is not easy to build a complete
+   flexible PHP RPM. This issue is addressed in PHP 4. For PHP 3, we
+   currently suggest you use the mechanism described in the
+   INSTALL.REDHAT file in the PHP distribution. If you insist on using an
+   RPM version of PHP 3, read on...
+
+   The RPM packagers are setting up the RPMS to install without database
+   support to simplify installations and because RPMS use /usr/ instead
+   of the standard /usr/local/ directory for files. You need to tell the
+   RPM spec file which databases to support and the location of the
+   top-level of your database server.
+
+   This example will explain the process of adding support for the
+   popular MySQL database server, using the mod installation for Apache.
+
+   Of course all of this information can be adjusted for any database
+   server that PHP supports. We will assume you installed MySQL and
+   Apache completely with RPMS for this example as well.
+
+     * First remove mod_php3 :
+
+rpm -e mod_php3
+
+     * Then get the source rpm and INSTALL it, NOT --rebuild
+
+rpm -Uvh mod_php3-3.0.5-2.src.rpm
+
+     * Then edit the /usr/src/redhat/SPECS/mod_php3.spec file
+       In the %build section add the database support you want, and the
+       path.
+       For MySQL you would add --with-mysql=/usr The %build section will
+       look something like this:
+
+./configure --prefix=/usr \
+--with-apxs=/usr/sbin/apxs \
+--with-config-file-path=/usr/lib \
+--enable-debug=no \
+--enable-safe-mode \
+--with-exec-dir=/usr/bin \
+--with-mysql=/usr \
+--with-system-regex
+
+     * Once this modification is made then build the binary rpm as
+       follows:
+
+rpm -bb /usr/src/redhat/SPECS/mod_php3.spec
+
+     * Then install the rpm
+
+rpm -ivh /usr/src/redhat/RPMS/i386/mod_php3-3.0.5-2.i386.rpm
+
+   Make sure you restart Apache, and you now have PHP 3 with MySQL
+   support using RPM's. Note that it is probably much easier to just
+   build from the distribution tarball of PHP 3 and follow the
+   instructions in INSTALL.REDHAT found in that distribution.
+
+   6. Unix: I patched Apache with the FrontPage extensions patch, and
+   suddenly PHP stopped working. Is PHP incompatible with the Apache
+   FrontPage extensions?
+
+   No, PHP works fine with the FrontPage extensions. The problem is that
+   the FrontPage patch modifies several Apache structures, that PHP
+   relies on. Recompiling PHP (using 'make clean ; make') after the FP
+   patch is applied would solve the problem.
+
+   7. Unix/Windows: I have installed PHP, but when I try to access a PHP
+   script file via my browser, I get a blank screen.
+
+   Do a 'view source' in the web browser and you will probably find that
+   you can see the source code of your PHP script. This means that the
+   web server did not send the script to PHP for interpretation.
+   Something is wrong with the server configuration - double check the
+   server configuration against the PHP installation instructions.
+
+   8. Unix/Windows: I have installed PHP, but when try to access a PHP
+   script file via my browser, I get a server 500 error.
+
+   Something went wrong when the server tried to run PHP. To get to see a
+   sensible error message, from the command line, change to the directory
+   containing the PHP executable (php.exe on Windows) and run php -i. If
+   PHP has any problems running, then a suitable error message will be
+   displayed which will give you a clue as to what needs to be done next.
+   If you get a screen full of HTML codes (the output of the phpinfo()
+   function) then PHP is working, and your problem may be related to your
+   server configuration which you should double check.
+
+   9. Some operating systems: I have installed PHP without errors, but
+   when I try to start apache I get undefined symbol errors:
+[mybox:user /src/php4] root# apachectl configtest
+ apachectl: /usr/local/apache/bin/httpd Undefined symbols:
+  _compress
+  _uncompress
+
+   This has actually nothing to do with PHP, but with the MySQL client
+   libraries. Some need --with-zlib, others do not. This is also covered
+   in the MySQL FAQ.
+
+   10. Windows: I have installed PHP, but when I to access a PHP script
+   file via my browser, I get the error:
+cgi error:
+ The specified CGI application misbehaved by not
+ returning a complete set of HTTP headers.
+ The headers it did return are:
+
+   This error message means that PHP failed to output anything at all. To
+   get to see a sensible error message, from the command line, change to
+   the directory containing the PHP executable (php.exe on Windows) and
+   run php -i. If PHP has any problems running, then a suitable error
+   message will be displayed which will give you a clue as to what needs
+   to be done next. If you get a screen full of HTML codes (the output of
+   the phpinfo() function) then PHP is working.
+
+   Once PHP is working at the command line, try accessing the script via
+   the browser again. If it still fails then it could be one of the
+   following:
+
+     * File permissions on your PHP script, php.exe, php4ts.dll, php.ini
+       or any PHP extensions you are trying to load are such that the
+       anonymous internet user ISUR_<machinename> cannot access them.
+     * The script file does not exist (or possibly isn't where you think
+       it is relative to your web root directory). Note that for IIS you
+       can trap this error by ticking the 'check file exists' box when
+       setting up the script mappings in the Internet Services Manager.
+       If a script file does not exist then the server will return a 404
+       error instead. There is also the additional benefit that IIS will
+       do any authentication required for you based on the NTLanMan
+       permissions on your script file.
+
+   11. Windows: I've followed all the instructions, but still can't get
+   PHP and IIS to work together!
+
+   Make sure any user who needs to run a PHP script has the rights to run
+   php.exe! IIS uses an anonymous user which is added at the time IIS is
+   installed. This user needs rights to php.exe. Also, any authenticated
+   user will also need rights to execute php.exe. And for IIS4 you need
+   to tell it that PHP is a script engine. Also, you will want to read
+   this faq.
+
+   12. When running PHP as CGI with IIS, PWS, OmniHTTPD or Xitami, I get
+   the following error: Security Alert! PHP CGI cannot be accessed
+   directly..
+
+   You must set the cgi.force_redirect directive to 0. It defaults to 1
+   so be sure the directive isn't commented out (with a ;). Like all
+   directives, this is set in php.ini
+
+   Because the default is 1, it's critical that you're 100% sure that the
+   correct php.ini file is being read. Read this faq for details.
+
+   13. How do I know if my php.ini is being found and read? It seems like
+   it isn't as my changes aren't being implemented.
+
+   To be sure your php.ini is being read by PHP, make a call to phpinfo()
+   and near the top will be a listing called Configuration File
+   (php.ini). This will tell you where PHP is looking for php.ini and
+   whether or not it's being read. If just a directory PATH exists than
+   it's not being read and you should put your php.ini in that directory.
+   If php.ini is included within the PATH than it is being read.
+
+   If php.ini is being read and you're running PHP as a module, then be
+   sure to restart your web server after making changes to php.ini
+
+   14. How do I add my PHP directory to the PATH on Windows?
+
+   On Windows NT, 2000, XP and 2003:
+
+     * Go to Control Panel and open the System icon (Start -> Settings ->
+       Control Panel -> System, or just Start -> Control Panel -> System
+       for Windows XP/2003)
+     * Go to the Advanced tab
+     * Click on the 'Environment Variables' button
+     * Look into the 'System Variables' pane
+     * Find the Path entry (you may need to scroll to find it)
+     * Double click on the Path entry
+     * Enter your PHP directory ant the end, including ';' before (e.g.
+       ;C:\php)
+     * Press OK and restart your computer
+
+   On Windows 98/Me you need to edit the autoexec.bat file:
+
+     * Open the Notepad (Start -> Run and enter notepad)
+     * Open the C:\autoexec.bat file
+     * Locate the line with PATH=C:\WINDOWS;C:\WINDOWS\COMMAND;..... and
+       add: ;C:\php to the end of the line
+     * Save the file and restart your computer
+
+     Note: Be sure to reboot after following the steps above to ensure
+     that the PATH changes are applied.
+
+   The PHP manual used to promote the copying of files into the Windows
+   system directory, this is because this directory (C:\Windows,
+   C:\WINNT, etc.) is by default in the systems PATH. Copying files into
+   the Windows system directory has long since been deprecated and may
+   cause problems.
+
+   15. How do I make the php.ini file available to PHP on windows?
+
+   There are several ways of doing this. If you are using Apache, read
+   their installation specific instructions (Apache 1, Apache 2),
+   otherwise you must set the PHPRC environment variable:
+
+   On Windows NT, 2000, XP and 2003:
+
+     * Go to Control Panel and open the System icon (Start -> Settings ->
+       Control Panel -> System, or just Start -> Control Panel -> System
+       for Windows XP/2003)
+     * Go to the Advanced tab
+     * Click on the 'Environment Variables' button
+     * Look into the 'System variables' pane
+     * Click on 'New' and enter 'PHPRC' as the variable name and the
+       directory where php.ini is located as the variable value (e.g.
+       C:\php)
+     * Press OK and restart your computer
+
+   On Windows 98/Me you need to edit the autoexec.bat file:
+
+     * Open the Notepad (Start -> Run and enter notepad)
+     * Open the C:\autoexec.bat file
+     * Add a new line to the end of the file: set PHPRC=C:\php (replace
+       C:\php with the directory where php.ini is located). Please note
+       that the path cannot contain spaces. For instance, if you have
+       installed PHP in C:\Program Files\PHP, you would enter
+       C:\PROGRA~1\PHP instead.
+     * Save the file and restart your computer
+
+   16. Is it possible to use Apache content negotiation (MultiViews
+   option) with PHP?
+
+   If links to PHP files include extension, everything works perfect.
+   This FAQ is only for the case when links to PHP files don't include
+   extension and you want to use content negotiation to choose PHP files
+   from URL with no extension. In this case, replace the line AddType
+   application/x-httpd-php .php with:
+# PHP 4
+AddHandler php-script php
+AddType text/html php
+
+# PHP 5
+AddHandler php5-script php
+AddType text/html php
+
+   This solution doesn't work for Apache 1 as PHP module doesn't catch
+   php-script.
+
+   17. Is PHP limited to process GET and POST request methods only?
+
+   No, it is possible to handle any request method, e.g. CONNECT. Proper
+   response status can be sent with header(). If only GET and POST
+   methods should be handled, it can be achieved with this Apache
+   configuration:
+<LimitExcept GET POST>
+Deny from all
+</LimitExcept>