Hot answers tagged browser-detecting
Sending a non-interaction parameter with the Event hit type seems to keep the sessions at 0. The only issue I see now is that the "New Users" column still has data in it. This does not affect the graph or the total number of hits/sessions/pageviews, but I wanted to note it. The syntax for a non-interaction is 'ni' (boolean) where 1 is non-interaction, and 0 ...
You want Modernizr, a feature based detection library. Combine that with Browsehappy.org, and you should be able to detect when someone is on a browser that can't support your website, and they'll be able to easily either upgrade or move to a better browser.
Very likely an automated script hitting your site and trigger analytics to fire. PHP can be a valid user agent, at least according to http://www.useragentstring.com/pages/useragentstring.php I would drill down in to the PHP analytics and then view the location of those visitors, time on site, page views and more to try and determine if it's a script or ...
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