[1.20] I receive the error "cannot load MySQL extension, please check PHP Configuration".
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.