Hi,
you can only specify a custom php.ini if you are running php through the CGI interface (not with the built in or shared php).
Create a shell script in your cgi directory (e.g. /home/hosts/host1/cgi-bin):
#!/bin/sh
exec /usr/bin/php -c /home/hosts/host1/conf/php.ini "$@"
Add the following to your httpd.conf:
<Directory /home/hosts/host1/htdocs/>
AddHandler php-host1 .php
Action php-host1 /home/hosts/host1/cgi-bin/myphp.sh
</Directory>
The only way to use custom ini setting when using the built in or shared php module is to use the ini_set() function like mentioned by piersk.
Regards,
Thomas