title: Update PHP and MySQL server instances
body: <p>I am working on a mobile application that communicates with an IIS server to synchronize data among application users. 
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     The server is implemented in PHP and MySQL. The final procuct will consist of the server and the application. In other words, every client (company) is going to use a different server and the employees of each company will be the users of the mobile application. As soon as the application is released, bugs are expected to come up. Therefore, each synchronization server will require updates. The db schema and the PHP code will probably need to be altered. Using git to have clients fetch the most recent version of the server is not an option since the clients are not able to handle issues such as merge conflicts. 
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     I need to automate the update process as much as possible. Is there any tool or piece of advice that would help me do so?</p>
  
  <p>Thank you in advance for your assistance.</p>