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Codeigniter blank page and error 500 in apache log?

I spent over 5 hours yesterday trying to figure out whats wrong with my setup. In the ci213/application/controllers and views directories I have a simple site.php controller and test.php view. I'm out of ideas as to why this site wont load. Anyone have suggestions on what I could look for next? Maybe logging it's working properly? If I could get better log errors I could have more to work with.

I figured it has to be something with codeigniter since I have an index.php and index.html at apaches root (/var/www) and also an index2.php at the sites root (/var/www/vhosts/srp-local/htdocs), when I go to localhost/index.(php|html) or srp-local/index2.php the pages load and display properly so php and apache are working.

Trying to load the site I get a blank page so I figured it has to be something with CI. I'm tailing all the log files and the only one that gets an update is the site access.log with the following error. - - [23/Mar/2013:09:00:28 -0600] "GET / HTTP/1.1" 500 381 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0"

$config['base_url'] = 'http://srp-local/'; # My hosts file is configured for this.
$config['log_threshold'] = 4;
$config['log_path'] = '/var/www/vhosts/srp-local/logs/ci_error.log';

class Site extends CI_Controller
    public function index()

Apache Root

$ ll
drwxrwsr-x  6 krizzo www-data 4096 Mar 22 10:45 it355
drwxrwsr-x  6 krizzo www-data 4096 Mar 22 17:45 srp-local
htdocs is the webroot for srp-local and it's index.php is referred to the ci213 folder.

$ ll srp-local/
drwxrwsr-x 2 krizzo www-data 4096 Mar 22 17:06 cgi-bin
drwxrwsr-x 4 krizzo www-data 4096 Mar 22 17:14 ci213
drwxrwsr-x 2 krizzo www-data 4096 Mar 22 17:19 logs
drwxrwsr-x 5 krizzo www-data 4096 Mar 22 17:26 htdocs
All log locations/permissions

    -rw-rw-rw- 1 www-data adm     0 Mar 23 08:52 php_errors.log
    -rw-r----- 1 root     adm 12191 Mar 23 09:32 access.log
    -rw-r----- 1 root     adm  4858 Mar 23 09:32 error.log

    -rw-r--r-- 1 root   www-data  3227 Mar 22 19:42 error.log
    -rw-rw-r-- 1 krizzo www-data     0 Mar 23 09:37 ci_error.log
    -rw-r--r-- 1 root   www-data 12983 Mar 23 09:38 access.log
php.ini file settings

error_reporting = E_ALL & ~E_DEPRECATED
log_errors = On
error_log = /var/log/apache2/php_errors.log
asked Jun 2, 2015 in codeinither by rajesh
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