With Nginx as the Load Balancer server, where is the PHP code (there are many upstream PHP servers)?

PHP code is to be placed on the Nginx server above a copy, or on the PHP server to put a copy?

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PHP code is to be placed on the Nginx server above a copy, or on the PHP server to put a copy?

What is PHP's code doing on Nginx? Let Nginx explain? The PHP code should be placed on the server where the interpreter resides ~

The application server and the balanced load server are separate. You can use Nginx as an application server or as a server for load balancing. The role of the server is 2 selected 1, can not be balanced load, but also application analysis.

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