Interactive session fails to start when running php-fpm in foreground

[mvasin]

I use docker to run nginx, mysql and php-fpm all in separate containers. And I start php-fpm container not with php-fpm command, but with sleep 1000000, then log in into that container and run php-fpm interactively. Unfortunately, it fails start interactive session:

root@92ce84f482a5:/var/www# php-fpm -F
[17-Nov-2017 07:30:39] NOTICE: fpm is running, pid 135
[17-Nov-2017 07:30:39] NOTICE: ready to handle connections
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "Psy Shell v0.8.15 (PHP 7.1.11 — fpm-fcgi) by Justin Hileman"
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: ""
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "From mu-plugins/for-the-visually-impaired/for-the-visually-impaired.php:375:"
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: ""
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "    373| $imgsz=array('1'=>"16",'2'=>"24",'3'=>"41",'4'=>"58");"
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "    374| 	$color = '#FF0000';"
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "  > 375|   eval(\Psy\sh());"
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "    376| 	$custom_css = ""
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "    377| 		.vi-on-img-button{"
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: ""
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: ""
[17-Nov-2017 07:30:46] WARNING: [pool www] child 136 said into stdout: "Exit:  Ctrl+D"
172.24.0.2 -  17/Nov/2017:07:30:45 +0000 "GET /index.php" 200

I wonder if it's possible to use php-fpm to debug interactively this way. I see that readme says apache/nginx is not supported, but it's not remote debugging.

If it's not possible by now, I guess it makes sense to mention in the readme that starting php-fpm in foreground also won't let you debug.

[bobthecow]

Yeah, even running in the foreground like this, rather than a daemon, php-fpm isn't running the actual PHP process. It's a process manager running a pool of processes.

In order to work interactively, psysh must be the active process, or must be run by a process that pipes stdin and stdout to and from psysh. php-fpm doesn't do that, apache doesn't do that, and nginx doesn't do that, even if you're running them in the foreground.

[bobthecow]

The documentation has been updated to include PHP-FPM :)

[mvasin]

Sounds good, @bobthecow! Can you please give a link?

[bobthecow]

I just updated the "Usage" section to include PHP-FPM as "unsupported":

Unfortunately, debugging through a web server like Apache or nginx or PHP-FPM is also not supported. Debugging is only supported when running PHP scripts from the command line or through PHP's built-in web server. If you're interested in helping add this functionality, see Github issue 121.

[mvasin]

Okay, now it's clear.