Problem with PHP and wordpress version

Question

I am trying to learn wordpress and I came across the following problem: I have two notebooks with Windows 7 and in the oldest the most current version of wordpress gave incompatibility with PHP version 5.5.12, in the newer laptop also with windows 7 gave another msg error due to PHP being very current (7.3.10) displaying error: 

Warning: Count(): Parameter must be an array or an Object that Implements Countable in C: xampp htdocs cursoWP wp-includes functions.php on line 1072 . 

I did some research, applied the suggested solution but unsuccessfully.

The question is this: if I update wamp will automatically update php and mysql, will it subscribe to the previous installation? I will lose the existing Bds in mysql?

There’s a Zica this, I’ve never seen it, in one note is too old and in the other is too current, will understand...

Answer 1

If you don’t want to uninstall, you can use another local server like xamp. Anyway to not lose the banks, back up. Anyway, the problem is not the windows version but the version of your wamp, which on a machine is outdated.