如何在单个shell行中执行多个PHP文件？

Question

I have some PHP files. Each of them start a socket listener, or run an infinite loop. The scripts halt when are executed via php command:

php sock_listener.php ...halt there
php listener2.php ... halt there
...

Currently I use screen command to start all the listener PHP files every time the machine is rebooted. Is there a way I can start all the listener PHP files in single shell line so that I can write a shell script to make it easier to use?

Answer 1

Using screen

Create a detached screen session for the first script:

session='php-test'
screen -S "$session" -d -m -t A php a.php

where -d -m combination causes screen to create a detached session.

Run the rest of the scripts in the same session in separate windows:

screen -S "$session" -X screen -t B php b.php
screen -S "$session" -X screen -t C php c.php

where

• -X sends the built-in screen command to the running session;
• -t sets the window title.

The session will be available in the output of screen -ls command:

There is a screen on:
  8951.php-test (Detached)

Connect to the session using -r option, eg:

screen -r 8951.php-test

List the windows within the screen session with Ctrl - a " shortcut, or windowlist -b command.

Forking Processes to Background

A less convenient way is to send the commands to background by appending an ampersand at the end of each command:

nohup php a.php 2>a.php.err >a.php.out &
nohup php b.php 2>b.php.err >b.php.out &
nohup php c.php 2>c.php.err >c.php.out &

where

• nohup prevents termination of the commands, if the user logs out of the shell. Read this tutorial for more information;
• 2>a.php.err redirects the standard error to a.php.err file;
• >a.php.out redirects the standard output to a.php.out file.

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Is there a way I can start all the listener PHP files in single shell line so that I can write a shell script to make it easier to use?

You can put the above-mentioned commands into a shell script file, eg:

#!/bin/bash -
# Put the commands here

make it executable:

chmod +x /path/to/script

and call it when you need it:

/path/to/script

Modify the shebang as appropriate.

Answer 2

Just run them under circus. Circus will let you define a number of processes and how many instances you want to run, and just keep them running. https://circus.readthedocs.io/en/latest/