Se mi esce questo errore:
impossibile caricare l'estensione MySQL,
controlla la configurazione di PHP.
significa che:
To connect to a MySQL server, PHP needs a set of MySQL functions called "MySQL extension". This extension may be part of the PHP distribution (compiled-in), otherwise it needs to be loaded dynamically. Its name is probably mysql.so or php_mysql.dll. phpMyAdmin tried to load the extension but failed.

Usually, the problem is solved by installing a software package called "PHP-MySQL" or something similar.
Per cui dovrei caricare le estensioni PHP per MySql, mi spiegate come si fà?