Extension mysqli is missing, phpmyadmin doesn't work

Latest phpMyAdmin versions require mysqli extension and will no longer work with mysql one (note the extra "i" at the end of its name).

For PHP 5

sudo apt-get install php5-mysqli

For PHP 7.3

sudo apt-get install php7.3-mysqli

Will install package containing both old one and the new one, so afterwards all you need to do is to add

extension=mysqli.so

in your php.ini, under the subject Dynamic Extensions.

Restart apache:

sudo systemctl restart apache2

Authenitacate and press enter.

Should be done! If problem still occurs remove the browser cache.

sudo apt-get install php5-mysql
sudo apt-get install php5-mysqlnd 

try both of alternatively it works for me

If you run PHPMyAdmin on localhost uncomment in file /etc/php5/apache2/php.ini this line:

mysqli.allow_local_infile = On

Restart Apache:

sudo /etc/init.d/apache2 restart