The NetTuts.com Code blog has posted the second part of their series showing how to use the New Relic monitoring service in various kinds of web applications. In the previous article they looked at using it in a Ruby application, but in this new post it's all about PHP.
Today, we will look at how to monitor a PHP application using New Relic. More specifically, we will set up a basic WordPress installation and get some performance data about it, in the New Relic dashboards. [...] With the PHP version of the agent, the environment is a lot more important, as the agent is installed and lives on the box where the application will be deployed, rather than being part of any particular app.
They use an EC2 instance for their example, but the steps can be applied on other systems. They help you get the needed software installed, validate they're correctly configured and do a basic setup of WordPress. Next up is the steps to install the New Relic "newrelic-php5" software and get it fully installed. They also include the updates you'll need to make to your Apache configuration to configure the New Relic instance and how to keep the agent up to date.