What role does a reverse proxy like Nginx play in front of a PHP application in a typical production deployment architecture?

Intermediate

Answer

A reverse proxy sits in front of your PHP application, handling tasks such as terminating SSL and TLS encryption, serving static files directly without involving PHP at all, compressing responses, load balancing traffic across multiple application servers, and providing an additional layer of security by controlling exactly what requests actually reach your PHP-FPM processes, all of which significantly improve both performance and security compared to exposing PHP-FPM directly to the internet.

server {
    listen 443 ssl;
    server_name example.com;
    root /var/www/current/public;
    location / { try_files $uri /index.php?$query_string; }
}

Real-world example A production PHP application uses Nginx as a reverse proxy to handle SSL termination and serve static assets like images directly, only forwarding actual PHP page requests to the underlying PHP-FPM process pool, significantly reducing the workload PHP itself needs to handle.

Common follow-ups: What is the difference between a reverse proxy and a load balancer in this context?;How does SSL termination at the reverse proxy improve overall application performance?

Security;Performance Optimization & OPcache

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