Although Drupals 7+ run smoothly on PHP 5.3, Drupal 6 still feels much better with PHP 5.2. Even though D6 core is compatible with PHP 5.3 for quite some time now, a lot of contributes modules still get nasty hiccup when asked to run on the newer version. Therefore developing for both D7 and D6 at the same time becomes much less painful when running both versions of PHP in parallel.
One way of doing it is using mod_php5 Apache module to serve PHP 5.3 applications, while running PHP 5.2 applications using fastcgi module. Under Ubuntu 12.04 this can be achieved by installing PHP 5.3 from the repositories and manually compiling and installing PHP 5.2 afterwards.
Installing PHP 5.3 from repositories is fairly easy process, which you most probably already have under your belt, so let's just say that it looks more or less like this:
sudo apt-get install php5 php5-common php5-cli php5-dev php5-mysql phpmyadmin php5-pgsql phppgadmin php5-gd php5-mcrypt php5-curl php-pear libapache2-mod-php5 php5-xdebug php5-codesniffer
What is much more interesting though, and what this post will focus on, is how to add PHP 5.2 to the whole picture and make both those versions work nicely together.
Download PHP sources
Let's then start with downloading PHP 5.2 sources from Unsupported Historical Releases list.
I have originally started with version 5.2.10 (as it is the same version that we have on our production servers), but then was stopped short by OpenSSL error during configuration stage:
/usr/include/openssl/conf.h:132:7: note: expected 'struct lhash_st_CONF_VALUE *' but argument is of type 'int *'
make: *** [ext/openssl/openssl.lo] Error 1
to which I was not able to find any good fix (relatively easy to apply anyway), so finally ended up with the most recent version from 5.2 branch - 5.2.17, where those errors haven't occured anymore.
Let's then download and uncompress PHP sources into
mkdir -p ~/Downloads/php-5.2.17
tar zxf php-5.2.17.tar.gz
Time to configure the package. Example
./configure call could look as follows:
sudo ./configure \
--enable-force-cgi-redirect --enable-fastcgi \
Obviously you need to adapt it to yur specific needs by adding and/or removing relevant options. You can read more about options you want (or don't want) to include in PHP core configure options documentation.
Now, that probably didn't work out of the box, did it?
In most cases quite a lot of dependencies will be missing. You can try to take care of them in one shot, if you don't care too much about installing a little too much compared to what is really needed:
sudo apt-get install libxml2-dev libpcre3-dev libbz2-dev libcurl4-openssl-dev libdb4.8-dev libjpeg-dev libpng12-dev libxpm-dev libfreetype6-dev libmysqlclient-dev postgresql-server-dev-9.1 libt1-dev libgd2-xpm-dev libgmp-dev libsasl2-dev libmhash-dev unixodbc-dev freetds-dev libpspell-dev libsnmp-dev libtidy-dev libxslt1-dev libmcrypt-dev
You can also remedy missing dependencies one by one, and install only those packages that are really needed.
Let's go through some of the possible errors then (you can skip to the next section if your
./configure finished without any errors and displayed nice Thank you for using PHP at the end of its execution):
configure: error: xml2-config not found. Please check your libxml2 installation.
This error message suggests you don't have libxml2 installed. What it really means though is that you don't have its development version installed!
Let's then search what we can find in available packages, what could help us resolve this issue:
$ apt-cache search libxml2 | grep dev
libcroco3-dev - Cascading Style Sheet (CSS) parsing and manipulation toolkit
libxml++2.6-dev - C++ interface to the GNOME XML library (libxml2)
libxml2-dev - Development files for the GNOME XML library
libgdome2-cpp-smart-dev - C++ bindings for GDome2 DOM implementation
libgdome2-dev - Development files for libgdome2
libgdome2-ocaml-dev - OCaml bindings for GDome2 DOM implementation
libgtkmathview-dev - rendering engine for MathML documents
libsp-gxmlcpp-dev - S+P C++ wrapper for Gnome libxml2/libxslt
What we are interested in here is
libxml2-dev, let's install it then:
sudo apt-get install libxml2-dev
The same procedure applies to all other missing libraries as well, so I will include only final install calls from now on.
configure: error: Could not find pcre.h in /usr
sudo apt-get install libpcre3-dev
configure: error: Please reinstall the BZip2 distribution
sudo apt-get install libbz2-dev
configure: error: Please reinstall the libcurl distribution - easy.h should be in
sudo apt-get install libcurl4-openssl-dev
configure: error: DBA: Could not find necessary header file(s).
checking for db4 major version... configure: error: Header contains different version
sudo apt-get install libdb4.8-dev
configure: error: libjpeg.(a|so) not found.
sudo apt-get install libjpeg-dev
configure: error: libpng.(a|so) not found.
sudo apt-get install libpng12-dev
configure: error: libXpm.(a|so) not found.
sudo apt-get install libxpm-dev
configure: error: freetype.h not found.
sudo apt-get install libfreetype6-dev
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
configure: error: Cannot find libpq-fe.h. Please specify correct PostgreSQL installation path
sudo apt-get install postgresql-server-dev-9.1
Make sure you check result of
apt-cache searchespecially in case of this error, as there could be later version of PostgreSQL available.
checking for FreeType 1 support... no - FreeType 2.x is to be used instead
configure: error: Your t1lib distribution is not installed correctly. Please reinstall it.
sudo apt-get install libt1-dev
configure: error: Unable to find gd.h anywhere under /usr
sudo apt-get install libgd2-xpm-dev
configure: error: Unable to locate gmp.h
sudo apt-get install libgmp-dev
configure: error: Cannot find MySQL header files under /usr.
Note that the MySQL client library is not bundled anymore!
sudo apt-get install libmysqlclient-dev
configure: error: sasl.h not found!
sudo apt-get install libsasl2-dev
configure: error: Please reinstall libmhash - I cannot find mhash.h
sudo apt-get install libmhash-dev
checking for unixODBC support... configure: error: ODBC header file '/usr/include/sqlext.h' not found!
sudo apt-get install unixodbc-dev
configure: error: Directory /usr is not a FreeTDS installation directory
sudo apt-get install freetds-dev
configure: error: Cannot find pspell
sudo apt-get install libpspell-dev
configure: error: SNMP sanity check failed. Please check config.log for more information.
sudo apt-get install libsnmp-dev
configure: error: Cannot find libtidy
sudo apt-get install libtidy-dev
configure: error: xslt-config not found. Please reinstall the libxslt >= 1.1.0 distribution
sudo apt-get install libxslt1-dev
configure: error: mcrypt.h not found. Please reinstall libmcrypt.
sudo apt-get install libmcrypt-dev
configure: error: Cannot find OpenSSL's libraries
Add following switch to your
./configureoptions (optionally updating the path to reflect your system):
configure: error: You've configured extension pdo_sqlite to build statically, but it depends on extension pdo, which you've configured to build shared. You either need to build pdo_sqlite shared or build pdo statically for the build to be successful.
Add following switches to your
Everything configured properly and without errors? Then it is time to compile (and go for a coffee while it is running):
Now sipping your coffee wait for approaching errors...
Yes, things can go awry here too. And most probably will.
There are two make errors and one warning you are most probably going to experience:
ext/openssl/.libs/xp_ssl.o: In function `php_openssl_setup_crypto':
ext/openssl/xp_ssl.c:357: undefined reference to `SSLv2_server_method'
ext/openssl/xp_ssl.c:337: undefined reference to `SSLv2_client_method'
This is due to PHP bug #54736, which could be easily resolved using patch debian_patches_disable_SSLv2_for_openssl_1_0_0.patch attached to that bug report.
Download this patch to your
~/Downloads/php-5.2.17directory, and execute:
patch -p1 < debian_patches_disable_SSLv2_for_openssl_1_0_0.patch.patch
You should see friendly success messages like these:
patching file ext/openssl/xp_ssl.c
Hunk #1 succeeded at 332 (offset 4 lines).
Hunk #2 succeeded at 354 (offset 4 lines).
Hunk #3 succeeded at 583 (offset -50 lines).
Hunk #4 succeeded at 819 (offset -98 lines).
ext/gmp/gmp.c: In function ‘zif_gmp_random’:
ext/gmp/gmp.c:1399:69: error: ‘__GMP_BITS_PER_MP_LIMB’ undeclared (first use in this function)
ext/gmp/gmp.c:1399:69: note: each undeclared identifier is reported only once for each function it appears in
This time it's PHP bug #50990. In one of comments there susan dot smith dot dev at gmail dot com suggested solution which works and does its magic:
I solved replacing the outdated __GMP_BITS_PER_MP_LIMB defined constant with GMP_LIMB_BITS. The latter is present in all previous versions, and MPIR define it too.
You have to edit file
ext/gmp/gmp.cand replace one occurence of
GMP_LIMB_BITS, in my case it was in line 1399.
ext/zip/lib/.libs/zip_dirent.o: In function `memset':
/usr/include/x86_64-linux-gnu/bits/string3.h:82: warning: memset used with constant zero length parameter; this could be due to transposed parameters
Finally PHP bug #53568, with a pretty easy fix: edit file
ext/zip/lib/zip_dirent.cand in line 478 replace:
memset(&tm, sizeof(tm), 0);
memset(&tm, 0, sizeof(tm));
There, no more errors!
The simplest way of installing your new shiny PHP 5.2 now is:
sudo make install
Alternatively, if you plan to repeat the same installation again on other machines, or just want to keep the installation package file for the future, you can run:
which, together with installing new PHP, would also create
.debpackage file in your current directory.
Whichever way you choose, now you have PHP 5.2 installed in
Apache conf files
/etc/php52/apache2/ configuration directory for PHP 5.2 should have already been created during the installation process (create it now if it is not the case). Now you need to let PHP 5.2 use the same extensions as your version 5.3 is using:
sudo ln -s /etc/php5/conf.d /etc/php52
sudo ln -s /etc/php5/cli /etc/php52
php.ini-recommended file provided with PHP installation into its new directory (which will be defined in the next step):
sudo cp php.ini-recommended /etc/php52/apache2/php.ini
and make required amends to it if need be.
Apache and FastCGI
Next thing to do is to set up Apache to run PHP 5.2 using FastCGI. Start with installing
sudo apt-get install libapache2-mod-fastcgi
Make sure all required modules are enabled and restart Apache:
sudo a2enmod cgi fastcgi actions
sudo service apache2 restart
Create a wrapper script called
php52-cgi to run the fastcgi enabled version of PHP and place it under
/usr/lib/cgi-bin/, with the following content:
PHPRC parameter tells PHP 5.2 where to look for a
PHP_FCGI_CHILDREN pre-forks threads with the FastCGI process manager.
PHP_FCGI_MAX_REQUESTS limits the requests.
exec executes php. You can read more about this on FastCGI site.
Make sure the file is executable:
sudo chmod +x /usr/lib/cgi-bin/php52-cgi
Finally create new include file
/etc/apache2/php52.conf, which will be used by those virtual hosts that need to run off PHP 5.2. Add the following content to it:
# Include file for virtual hosts that need to run PHP 5.2
ScriptAlias /php52-cgi /usr/lib/cgi-bin/php52-cgi
Action application/x-httpd-php5 /php52-cgi
AddHandler application/x-httpd-php5 .php
FilesMatch forces the handler to execute files with the suffix
.php. This must be set, because if mod_php with PHP 5.3 is installed, the module interprets the php file and not the cgi script.
ScriptAlias sets the path to the cgi script.
AddHandler registers a new handler.
Action activates the cgi script for the files passed from the handler.
Only one thing left to do now - for all hosts which you want to be running on PHP 5.2 , edit their configuration file and add the following line inside their
and reload new configuration:
sudo service apache2 reload
Final result? For all you Drupallers out there - you successfully managed to change this:
- Baddý and Christoph's Blog: PHP-5.2 and PHP-5.3 for Drupal applications under Apache on Ubuntu 10.04 LTS
- Klausi's blog: Running PHP 5.3 and 5.2 in parallel with nginx
- Dave Perrish: Ubuntu 10.04 Lucid LAMP server running php 5.2 and 5.3
- Brettic.us: PHP 5.2 and 5.3 side-by-side on Apache and Ubuntu 10.10
- DiscussWire: Running PHP 5.2 and 5.3 On The Same Server