When the PHP hanlder is set to suPHP user can create their own php.ini files in public_html folder and modify the PHP variables. In case of DSO handler you have directly add php_value & php_flag lines to .htaccess. But fcgi doesn’t provide this option directly. So we will have to create a custom PHP wrapper for the fcgi.
First of all copy the server php.ini to cgi-bin folder of the user account.
cp -a /usr/local/lib/php.ini /home/smp/public_html/cgi-bin/ chown smp:smp /home/smp/public_html/cgi-bin/php.ini
Now create the wrapper script /home/smp/public_html/cgi-bin/php53.fcgi and add the below lines to it.
#!/bin/sh export PHP_FCGI_CHILDREN=1 export PHP_FCGI_MAX_REQUESTS=10 exec /usr/local/cpanel/cgi-sys/php5
Fix ownership and set the permission to 755 to make it executable.
chown smp:smp /home/smp/public_html/cgi-bin/php53.fcgi chmod 755 /home/smp/public_html/cgi-bin/php53.fcgi
Now add below lines to .htaccess files
AddHandler php53-fastcgi .php Action php53-fastcgi /cgi-bin/php53.fcgi
NOTE: The account should have CGI Privilege for this to work.