I have hosted a journal on OJS version 3.1.0. The PHP version is 7.1.
I now want to upgrade OJS version to 3.1.2 but since the PHP version was 7.1 I tried to upgrade PHP to 7.3. After PHP up gradation the site is not visible. So I changed the PHP version from 7.3 to 7.1 again.
Is it possible to upgrade OJS version 3.1.0 to 3.1.2 in PHP 7.1 itself? If not possible, how to upgrade 7.1 to 7.3 without OJS being disappearing?