It would be sweet if we can get auto email notifications whenever someone pushes to our github project. Unfortunately, the default email service hook of github only supports 2 email addresses at most. Although putting everyone into a mailing list is one solution, for small teams like us, it's also convenient to get a quick php script to do this.
The underlying process is, github provides a post-receiving web hook. Whenever it receives a push, a URL specified by the user will be hit with a JSON payload about the details. We then get a php script parsing the payload and send out the summary emails.
mail() function in php may need extra setup.
Check here for a brief introduction about the configuration.
Of course this can be used to do more such as blog deployment. Stephen Zhang got his blog deployed this way.