The current version of WordPress may still run on 5.2 but it is intended to be run on 5.5.
On 5.5 it uses the mysqli database interface instead of the mysql one - as you can easily find out by turning the mysql interface off.
The current version of WordPress may still run on 5.2 but it is intended to be run on 5.5.
On 5.5 it uses the mysqli database interface instead of the mysql one - as you can easily find out by turning the mysql interface off.