I'm having the same issue as OP, after upgrading to php 7.0 on my host -
I just finished a(nother) support chat with my host and they said -SQL ERROR [ mysql4 ]
mysql_connect function does not exist, is mysql extension installed? 
An sql error occurred while fetching this page. Please contact an administrator if this problem persists.
My config.php -We have MySQL 5.6.33, and also mysqli is in php7, which we do support
It should be mysqli_connect, not mysql_connect
But that is really going beyond our scope of support as we do not support development of the software.
You'll need to contact the creators of the software.
Code: Select all
$dbms = 'phpbb\\db\\driver\\mysqli';