How to make PHP flush() work on Azure web apps?

Question

This simple script will run without a problem on a LAMP server (Ubuntu) running on a VM/Azure. However, when ported to Azure web apps (php), the same script will get a 502 or 504 error after 5 minutes, and will show no output. If the number of lines is reduced to less than 300 (about 5 minutes time) it will run, but all lines will appear only when the script ends. Any thoughts?

Answer 1

Hi.

You're probably running on PHP8, so Nginx's default settings make this work.

I tried changing the buffering mode and it worked, so I've posted the steps in the entry below.

https://dev.classmethod.jp/articles/app-service-on-linux-php-flush-buffering/

try it.
Also, I think you should review the timeout value at the beginning from the viewpoint of the Nginx setting value.