Help! Updated to PHP5.4 and now site no longer working

Hello,
Did the unthinkable and updated PHP version from 5.3 to 5.4 on a site hosted with GoDaddy... unfortunately they do not support down-versioning back to 5.3 and the update has rendered our website inaccessible.

website address is www.elitepet.com.au
OpenCart 1.5.5.1
PHP 5.4
MySQL 5.0

Current error on the webpage is 'Error: Could not load database file mysqli.php!'
- config.php setting 'is define('DIR_DATABASE', 'system/database/');'
'define('DB_DRIVER', 'mysqli');'
- mysqli.php file does exist in system/database directory

NOTE: I have put a maintenance page up on the site currently though can take down to assist with investigation.

Have researched a number of articles though I feel I am only opening more cans of worms than fixing the actual issue! Any help would be greatly appreciated!!!!

Did you try this solution:

viewtopic.php?f=20&t=163163#p639822

Thanks for the suggestion, yes I have undertaken the fix in the post you have shared though are still getting the error: 'Error: Could not load database file mysqli.php!'

You need the mysqli.php file if you are setting your database as mysqli in config.php

If you dont have it then you can create it copying the content of the file from here

https://github.com/opencart/opencart/bl ... mysqli.php

Hi All,

Many thanks for your suggestions, the mysqli.php file was in the path set in config.php & admin\config.php... unfortunately due to the site downtime I initiated a new site based on 3.0.2.0 and manually migrated. (massive effort but happy with the outcome).

Thanks again.