Php - Your PHP installation appears to be missing the MySQL extension which is required by WordPress

Question

How do I fix the error below?

Your PHP installation appears to be missing the MySQL extension which is required by WordPress.

I

Answer 1

This Error is created by the WP core file /wp-includes/load.php and the function name is wp_check_php_mysql_versions().

The older versions of the WP does not support MySqli. But the latest WP versions support both MySql and MySqli extensions without bothering installed PHP versions.

Solved my problem 100%

In my case, I just updated the Wordpress core files manually and solved the issue :)