It's first time using OpenCart. A strange issue appeared, when I've tried to install OpenCart version 1.5.4 on my computer. I've searched for an answer on forums, but community is not as large as WP's one.
I am using
Linux (Elementary OS - so Debian based), with
LAMPP installed on my machine.
10.1.13-MariaDB (innodb_version 5.6.28-76.1),
I realised that the 1.5.x branch of this system is quite old. If you take a look at the source for the installer file, it insists on the
mysql extension. You could try hacking that, but my guess would be that it uses
mysql_ calls throughout, and the whole product won't work.
As soon as you move to the 2.0.x tree, the number of permissible database extensions grows quite a bit. From this version, you can use any of these:
mysql, mysqli, pgsql, pdo
mysql has been deprecated for quite a while, and in PHP 7 it was finally removed. You therefore are unlikely to be able to use OC 1.5 together with PHP 7.
Your possible solutions are: