I’ve used new relic with my rails apps for over a year now and like the service a lot. I recently noticed that they have integration with php so I decided to get the php agent configured on my server so I could get stats on an upcoming symfony 2 app.
I use Nginx / PHP-fpm to run my php apps on ubuntu. The install instructions on the new relic site worked pretty well except for one minor quirk.
I had to install php5-dev so that the new relic install script had php-config to execute to find out information about my install. After that, the install script kept complaining that it could not find a valid php install on the system.
With this particular setup, new relic would look for php in /usr/bin/php (from the php-config script) but that did not exist. There was /usr/bin/php5-fpm and /usr/bin/php5-cgi.
I created a symlink for /usr/bin/php and reran the install script.