To use PHP5 on your shared hosting server running both php4 and php5, create a file containing exactly the following contents: #!/bin/sh PHP_FCGI_CHILDREN=2 export PHP_FCGI_CHILDREN PHP_FCGI_MAX_REQUESTS=5000 export PHP_FCGI_MAX_REQUESTS exec /usr/local/php5/bin/php-cgi Name the file php5.fcgi, place it in your /public_html directory and make it executable (chmod 777). This script tells fastcgi to use the /php/bin/php-cgi program to run php5 files.