RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
# END WordPress
#Before: https://example.com/index.php?user=robert
RewriteEngine On
RewriteRule ^user/([^/]+)?$ index.php?user=$1 [L,QSA]
#After: https://example.com/user/robert?query=value
#You can also use other query too.
#Like: robert?query=value&query2=value2&query3=value3