php-ask God to answer questions about how PHP projects improve performance

Performance PHP concurrency

The company has a PHP project, but on the line to find the project's concurrent access and security is not very good, now the boss give me the task
, ask me to see if there is any way to improve the concurrency of the project, but I work for more than a year, the performance of this piece is not very understanding,
Online query said nginx+apache+php can increase the concurrency, but I used the Nginx proxy, but the performance of the test is not very ideal,
Ask the great God direction, thank you very much!!!

