prefork

#/etc/init.d/apache2 stop
#aptitude install apache2-mpm-worker php5-cgi

criar o ficheiro /etc/apache2/conf.d/php5-cgi.conf e introduzir neste:
<IfModule mod_actions.c>
Action application/x-httpd-php /cgi-bin/php5
</IfModule>

activar mod_actions e iniciar servidor:
#a2enmod actions
#/etc/init.d/apache2 start