All PHP Pages are showing up completely blank

Question

I programmed a website, no need to get into more detail about it but it works and does not require any DB or something like that. But on my new Ubuntu 10.04.4 LTS Server all PHP pages show up blank. I have installed Apache2, PHP5 and something I don't know what it is for with the following commands:

sudo apt-get install apache2
sudo apt-get install php5
sudo apt-get install libapache2-mod-php5
sudo /etc/init.d/apache2 restart

I have tried to deinstall and reinstall all of these components without and luck. None of the PHP pages show up in my browser, they show up blank and with a blank source, whereas all my pure .html pages work fine.

Is there any way to get it working, I would be happy to post more information but I do not know where I should get that.

Error Log:

PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/apache2/conf.d/mcrypt.ini on line 1 in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/curl.so' - /usr/lib/php5/20090626/curl.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/gd.so' - /usr/lib/php5/20090626/gd.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mcrypt.so' - /usr/lib/php5/20090626/mcrypt.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mysql.so' - /usr/lib/php5/20090626/mysql.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mysqli.so' - /usr/lib/php5/20090626/mysqli.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/pdo_mysql.so' - /usr/lib/php5/20090626/pdo_mysql.so: cannot open shared object file: No such file or directory in Unknown on line 0
[Mon Jul 23 00:36:05 2012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4.15 with Suhosin-Patch configured -- resuming normal operations
[Mon Jul 23 00:36:16 2012] [error] [client 217.227.25.35] PHP Parse error:  syntax error, unexpected ')' in /var/www/vtest5532/Header.php on line 19
[Mon Jul 23 00:36:17 2012] [error] [client 217.227.25.35] PHP Parse error:  syntax error, unexpected ')' in /var/www/vtest5532/Header.php on line 19
[Mon Jul 23 00:38:09 2012] [notice] caught SIGTERM, shutting down
PHP Deprecated:  Comments starting with '#' are deprecated in /etc/php5/apache2/conf.d/mcrypt.ini on line 1 in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/curl.so' - /usr/lib/php5/20090626/curl.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/gd.so' - /usr/lib/php5/20090626/gd.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mcrypt.so' - /usr/lib/php5/20090626/mcrypt.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mysql.so' - /usr/lib/php5/20090626/mysql.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/mysqli.so' - /usr/lib/php5/20090626/mysqli.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20090626/pdo_mysql.so' - /usr/lib/php5/20090626/pdo_mysql.so: cannot open shared object file: No such file or directory in Unknown on line 0
[Mon Jul 23 00:38:10 2012] [notice] Apache/2.2.14 (Ubuntu) PHP/5.3.2-1ubuntu4.15 with Suhosin-Patch configured -- resuming normal operations
[Mon Jul 23 00:38:59 2012] [error] [client 180.76.5.62] File does not exist: /var/www/Forum
[Mon Jul 23 01:10:36 2012] [error] [client 66.249.68.165] File does not exist: /var/www/Forum
[Mon Jul 23 01:10:36 2012] [error] [client 66.249.68.165] File does not exist: /var/www/Forum

Answer 1

PHP is configured not to display errors by default. If you check the Apache error log at /var/log/apache2/error.log you should see the cause of the problem. If this is a development machine you should also change your php.ini file to a more dev-friendly setup (show errors, error_reporting at max). If it's a production server then leave the php.ini as-is.