phpmyadmin with arch + lighttpd

install phpmyadmin

#yaourt -S phpmyadmin php-mcrypt

edit lighttpd.conf

add alias.url = ( "/phpmyadmin/" => "/usr/share/webapps/phpMyAdmin/") to  /etc/lighttpd/lighttpd.conf

edit .htaccess

#deny from all to /etc/webapps/phpmyadmin/.htaccess

edit php.ini
open_basedir = /srv/http/:/home/:/tmp/:/usr/share/pear/:/usr/share/webapps/:/etc/webapps
in
/etc/php/php.ini

extension=mcrypt.so
extension=mysql.so

works.