PHP not working in Apache2 after system upgrade

Recently upgraded my system from Karmic to Lucid. This involved Apache and PHP being updated I believe.

Now my server is unable to handle PHP files, any navigation to them is triggering downloading rather than parsing.

The PHP module is still loaded in Apache mods-enabled and I have AddType application/x-httpd-php .php in my httpd.conf.

There are no meaningful messages in Apache access or error logs so I am stumped.

Any help would be appreciated. Thanks.

/var/log/apache2/error.log should show a line like the below if PHP was succesfully loaded:

[Tue Aug 30 12:53:36 2011] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4.9 with Suhosin-Patch configured -- resuming normal operations

Pay attention to the date, if it's something from 2009, you've misconfigured something.

AddType is useless, you need to use:

<FilesMatch "\.php$">
    SetHandler application/x-httpd-php
</FilesMatch>

See also the installation instructions on php.net for Apache 2.x.

You should not have a need to add that manually, the package libapache2-mod-php5 installs /etc/apache2/mods-available/php5.conf containing:

<IfModule mod_php5.c>
    <FilesMatch "\.ph(p3?|tml)$">
        SetHandler application/x-httpd-php
    </FilesMatch>
    <FilesMatch "\.phps$">
        SetHandler application/x-httpd-php-source
    </FilesMatch>
    # To re-enable php in user directories comment the following lines
    # (from <IfModule ...> to </IfModule>.) Do NOT set it to On as it
    # prevents .htaccess files from disabling it.
    <IfModule mod_userdir.c>
        <Directory /home/*/public_html>
            php_admin_value engine Off
        </Directory>
    </IfModule>
</IfModule>

Since it's a conffile, it's possible that it's not installed with the upgrade. To fix that purge it and then install it again:

sudo apt-get purge libapache2-mod-php5
sudo apt-get install libapache2-mod-php5

To enable PHP, you have to run:

sudo a2enmod php5

Restart the webserver after:

sudo /etc/init.d/apache2 restart

Other things to do:

check for conflicting settings in /etc/apache2.
have you built Apache from source?
Run sudo apache2ctl configtest to check your configuration for syntax errors
Open http://localhost/server-info to check the loaded configuration and modules. The status module must be loaded for that. If you're running a remote server, you need to add yourself to the Allow from list in /etc/apache2/mods-enabled/status.conf and restart the server afterwards

Well after nothing else worked and Apache was getting very confusing I finally just purged all of the Apache packages and reinstalled them.

Seems to be working fine now, who knows what was wrong with it....

EDIT

I found out what was wrong when I was setting up my Apache configuration settings again. [This blog entry][1] explains it.

Turns out that although the userdir module is not actively in use, the rest of the sites files reside in my ~/public_html folder, and php was being disabled for everything in there.

I guess this must have been a recent addition to the php module which wasn't present in my Karmic settings.

the php5.conf file in /etc/apache2/mods-enabled has a few lines at the bottom that keep php from executing inside of a user directory, so depending on your configuration, this could be your issue also. You can just comment these lines out and apache2 reload

PHP not working in Apache2 after system upgrade

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