There are a lot of results on Google for this, but most of them are old more than an year.
I simply want to display some nice charts with jQuery in my admin with visits per day, most visited pages with number of visits, etc. I don't want to store the data for the visits in my database, the one at Google Analytics is perfect :)
Have a look at gapi-google-analytics-php-interface. The code has many examples which should be useful for you.
The code has not been updated in a while, so you should read this bug about what URLs to update inside the source code.
来源：https://stackoverflow.com/questions/15330121/best-api-to-display-google-analytics-data-in-my-admin-panel-with-codeigniter-php