Thanks for replying but I must be doing something wrong

http://imgur.com/a/Eq4IQ

from console

/var/www/html$ php -f install.php
PHP Notice:  Undefined index: doInstall in /var/www/html/install.php on line 9
PHP Notice:  Undefined index: doInstall in /var/www/html/install.php on line 151
PHP Notice:  Undefined index: SCRIPT_URL in /var/www/html/inc/General.php on line 14
PHP Notice:  Undefined index: SCRIPT_URL in /var/www/html/inc/General.php on line 14
PHP Fatal error:  Uncaught Error: Call to a member function query() on null in /var/www/html/inc/General.php:15
Stack trace:
#0 /var/www/html/install.php(246): General->__construct()
#1 {main}
  thrown in /var/www/html/inc/General.php on line 15