Xdebug on VSCode using docker

docker-compose.yml

version; '3.7'

services:
  php:
    volumes:
      - ...
    other_settings:
      - ...
    enviroment:
      ...
      XDEBUG_CONFIG: remote_host=host.docker.internal remote_port=9000 remote_enable=1 remote_connect_back=1
  other_service:
    ...

vscode_launch.json

{
    "version": "0.2.0",
    "configurations": [

        {
            "name": "Listen for XDebug",
            "type": "php",
            "request": "launch",
            "port": 9000,
            "log": true,
            "stopOnEntry": true,
            "pathMappings": {
                "/application": "${workspaceRoot}"
            }
        }
    ]
}

Some notes:

• You need to use the same php-fpm port exposed at Dockerfile
• At launch.json, stopOnEntry will stop request execution but you'll access and check your breakpoints
• At launch.json, patchMappings should follow server_path to local_path order