My collection of usefull apache config elements

.htaccess-env+password

#
# this file should ask for password, but only when we are on develop-domain
# on all other hosts it should allow access without requsting user data
#

# SetEnvIf Host develop.myserver.de passreq
SetEnvIf Host "^develop\.([^\.]*)\.de$" passreqprev

AuthType Basic
AuthName "Password Required"
AuthUserFile /www/my-server-path/public/.htpasswd

<IfModule mod_authz_core.c>
    ## This block currently not works like it should do.
    ## When Env is set it ALWAYS Blocks, and without env it allways allows access. Password is never requested
    # @see: https://wissen.profihost.com/wissen/artikel/wie-kann-ich-den-zugriff-auf-meine-seite-steuern/
    # @see: https://stackoverflow.com/a/30888914/2377961
    <RequireAny>
        <RequireAll>
            Require not env passreq
            Require all granted
        </RequireAll>
        <RequireAll>
            Require valid-user
        </RequireAll>
    </RequireAny>
</IfModule>
<IfModule !mod_authz_core.c>
    Require valid-user
    Order allow,deny
    Allow from all
    Deny from env=passreq
    Satisfy Any
</IfModule>

usefull_apache-examples.conf

## Controll Expire Times according Types:
<IfModule mod_expires.c>
    # Enable expirations
    ExpiresActive On 

    # Default directive
    ExpiresDefault "access plus 1 month"

    # All Images and Icons-Types
    ExpiresByType image/* "access plus 1 month"

    # CSS
    ExpiresByType text/css "access plus 1 month"

    # Javascript
    ExpiresByType application/javascript "access plus 1 year"
</IfModule>


<IfModule mod_alias.c>
    # block access to all files with the listed extension
    RedirectMatch 403 ^/.+\.(rar|zip|gz)$
</IfModule>