Trying To Get Xdebug To Work, But It Just Responds To Requests Containing Index.php

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Troubleshooting Xdebug with FrankenPHP and Laravel

Are you struggling to get Xdebug working with FrankenPHP and Laravel? You're not alone. Many developers face this issue, especially when trying to set up a local development environment. In this article, we'll explore the common pitfalls and provide a step-by-step guide to help you troubleshoot and resolve the issue.

Understanding the Problem

When you try to set up Xdebug with FrankenPHP and Laravel, you might encounter an issue where breakpoints are not triggered when calling a page like https://localhost/{laravel-route}. However, breakpoints are triggered when calling the page like https://localhost/index.php/{laravel-route}. This behavior can be frustrating, especially when you're trying to debug your code.

Analyzing the Dockerfile and docker-compose.yml

Let's take a closer look at the Dockerfile and docker-compose.yml files to understand the configuration.

FROM dunglas/frankenphp

RUN install-php-extensions \
    pcntl \
    bcmath \
    gd \
    opcache \
    pdo_mysql \
    xdebug \
    zip;

ENTRYPOINT ["/bin/sh", "-c" , "php -d variables_order=EGPCS artisan octane:start --server=frankenphp --host=localhost --port=443 --admin-port=2019 --https"]

services:
    laravel.test:
        build:
            context: ./vendor/laravel/sail/runtimes/8.4
            dockerfile: Dockerfile
            args:
                WWWGROUP: '${WWWGROUP}'
        image: sail-8.4/app
        extra_hosts:
            - 'host.docker.internal:host-gateway'
        ports:
            - '${APP_PORT:-80}:80'
            - '${VITE_PORT:-5173}:${VITE_PORT:-5173}'
        environment:
            WWWUSER: '${WWWUSER}'
            LARAVEL_SAIL: 1
        volumes:
            - '.:/var/www/html'
        networks:
            - sail
        depends_on:
            - frankenphp
            - mariadb
            - mailpit
    frankenphp:
        build:
            context: docker/frankenphp
        ports:
            - '443:443'
            - '443:443/udp'
        environment:
            XDG_CONFIG_HOME:  /app/config
            XDG_DATA_HOME:  /app/data
            XDEBUG_MODE: '${SAIL_XDEBUG_MODE:-off}'
            XDEBUG_CONFIG: '${SAIL_XDEBUG_CONFIG:-client_host=host.docker.internal}'
            CADDY_SERVER_EXTRA_DIRECTIVES: 'rewrite * /index.php/{path}?{query}'
        volumes:
            - .:/app
        networks:
          - sail
    mariadb:
        image: 'mariadb:11.7'
        ports:
            - '${FORWARD_DB_PORT:-3306}:3306'
        command: --max_allowed_packet=1073741824
        environment:
            MYSQL_ROOT_PASSWORD: '${DB_PASSWORD}'
            MYSQL_ROOT_HOST: "%"
            MYSQL_DATABASE: '${DB_DATABASE}'
            MYSQL_USER: '${DB_USERNAME}'
            MYSQL_PASSWORD: '${DB_PASSWORD}'
            MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
        volumes:
            - 'sail-mariadb:/var/lib/mysql'
            - './vendor/laravel/sail/database/mysql/create-testing-database.sh:/docker-entrypoint-initdb.d/10-create-testing-database.sh'
        networks:
            - sail
        healthcheck:
            test: ["CMD", "mysqladmin", "ping", "-p${DB_PASSWORD}"]
            retries: 3
            timeout: 5s
    mailpit:
        image: 'axllent/mailpit:latest'
        ports:
          - '8025:8025'
        networks:
          - sail
networks:
    sail:
        driver: bridge
volumes:
    sail-mariadb:
        driver: local

Identifying the Issue

The issue lies in the way Xdebug is configured. By default, Xdebug listens for incoming connections on port 9000. However, in your docker-compose.yml file, you've set the XDEBUG_CONFIG environment variable to client_host=host.docker.internal. This tells Xdebug to listen for incoming connections on the host machine's IP address.

However, when you call a page like https://localhost/{laravel-route}, the request is not sent to the host machine's IP address. Instead, it's sent to the Docker container's IP address. As a result, Xdebug is not able to intercept the request and trigger the breakpoints.

Resolving the Issue

To resolve this issue, you need to configure Xdebug to listen for incoming connections on the Docker container's IP address. You can do this by setting the XDEBUG_CONFIG environment variable to client_host=0.0.0.0.

frankenphp:
    ...
    environment:
        XDEBUG_CONFIG: '${SAIL_XDEBUG_CONFIG:-client_host=0.0.0.0}'
    ...

Additionally, you need to configure the Caddy server to rewrite incoming requests to include the index.php prefix. You can do this by setting the CADDY_SERVER_EXTRA_DIRECTIVES environment variable to rewrite * /index.php/{path}?{query}.

frankenphp:
    ...
    environment:
        CADDY_SERVER_EXTRA_DIRECTIVES: 'rewrite * /index.php/{path}?{query}'
    ...

Conclusion

In this article, we've explored the common pitfalls of setting up Xdebug with FrankenPHP and Laravel. We've identified the issue and provided a step-by-step guide to resolve it. By configuring Xdebug to listen for incoming connections on the Docker container's IP address and configuring the Caddy server to rewrite incoming requests, you should be able to get Xdebug working with FrankenPHP and Laravel.

Additional Tips

  • Make sure to restart the Docker container after making changes to the docker-compose.yml file.
  • Use the docker-compose up -d command to start the Docker container in detached mode.
  • Use the docker-compose exec command to execute a command inside the Docker container.
  • Use the docker-compose logs command to view the logs of the Docker container.

By following these tips and the steps outlined in this article, you should be able to get Xdebug working with FrankenPHP and Laravel. Happy debugging!
Q&A: Troubleshooting Xdebug with FrankenPHP and Laravel

In our previous article, we explored the common pitfalls of setting up Xdebug with FrankenPHP and Laravel. We identified the issue and provided a step-by-step guide to resolve it. However, we know that you may still have questions about troubleshooting Xdebug with FrankenPHP and Laravel. In this article, we'll answer some of the most frequently asked questions about this topic.

Q: What is Xdebug and why do I need it?

A: Xdebug is a popular PHP debugging tool that allows you to step through your code, set breakpoints, and inspect variables. It's an essential tool for any PHP developer, especially when working with complex applications like Laravel.

Q: What is FrankenPHP and how does it relate to Xdebug?

A: FrankenPHP is a Docker-based development environment for PHP applications. It provides a convenient way to set up a local development environment for your PHP projects. Xdebug is a popular debugging tool that can be used with FrankenPHP to debug your PHP code.

Q: Why is Xdebug not working with FrankenPHP and Laravel?

A: There are several reasons why Xdebug may not be working with FrankenPHP and Laravel. Some common issues include:

  • Xdebug is not installed or configured correctly
  • The Caddy server is not configured to rewrite incoming requests
  • The Docker container is not properly configured
  • The XDEBUG_CONFIG environment variable is not set correctly

Q: How do I configure Xdebug with FrankenPHP and Laravel?

A: To configure Xdebug with FrankenPHP and Laravel, you'll need to follow these steps:

  1. Install Xdebug in your Docker container
  2. Configure the Caddy server to rewrite incoming requests
  3. Set the XDEBUG_CONFIG environment variable to client_host=0.0.0.0
  4. Restart the Docker container

Q: What are some common issues with Xdebug and FrankenPHP?

A: Some common issues with Xdebug and FrankenPHP include:

  • Xdebug is not intercepting incoming requests
  • Breakpoints are not being triggered
  • Variables are not being displayed correctly
  • The XDEBUG_CONFIG environment variable is not being set correctly

Q: How do I troubleshoot Xdebug issues with FrankenPHP?

A: To troubleshoot Xdebug issues with FrankenPHP, you can try the following steps:

  1. Check the Xdebug logs for errors
  2. Verify that the Caddy server is configured correctly
  3. Check the Docker container logs for errors
  4. Verify that the XDEBUG_CONFIG environment variable is set correctly

Q: Can I use Xdebug with other PHP frameworks besides Laravel?

A: Yes, you can use Xdebug with other PHP frameworks besides Laravel. Xdebug is a general-purpose debugging tool that can be used with any PHP application.

Q: Are there any other debugging tools available for PHP besides Xdebug?

A: Yes, there are several other debugging tools available for PHP besides Xdebug. Some popular alternatives include:

  • Zend Debugger
  • PHPStorm Debugger
  • NetBeans Debugger

Conclusion

In this article, we've answered some of the most frequently asked questions about troubleshooting Xdebug with FrankenPHP and Laravel. We've covered topics such as Xdebug configuration, common issues, and troubleshooting steps. By following these tips and the steps outlined in this article, you should be able to get Xdebug working with FrankenPHP and Laravel. Happy debugging!