Warning: file_exists(): open_basedir restriction in effect. File(/home/hosting/prv-hosting/prv.pl/a/r/maciejkozyra/../wp-config.php) is not within the allowed path(s): (VIRTUAL_DOCUMENT_ROOT:/home/hosting/doklejka/:/tmp/) in /home/hosting/prv-hosting/prv.pl/a/r/maciejkozyra/wp-admin/setup-config.php on line 56 WordPress › Setup Configuration File

WordPress

Below you should enter your database connection details. If you’re not sure about these, contact your host.

The name of the database you want to run WP in.
Your MySQL username
…and your MySQL password.
You should be able to get this info from your web host, if localhost does not work.
If you want to run multiple WordPress installations in a single database, change this.