Previous behaviour was bugged from somewhere between 1.11.3 and 1.12.0:
```bash
❯❯ frankenphp git:(main) 10:46 ./frankenphp php-server
2026/03/08 03:46:36.541 WARN admin admin endpoint disabled
2026/03/08 03:46:36.541 WARN http.auto_https server is listening only on the HTTP port, so no automatic HTTPS will be applied to this server {"server_name": "php", "http_port": 80}
2026/03/08 03:46:36.542 INFO tls.cache.maintenance started background certificate maintenance {"cache": "0x182aaec16500"}
2026/03/08 03:46:36.582 INFO frankenphp FrankenPHP started 🐘 {"php_version": "8.6.0-dev", "num_threads": 32, "max_threads": 32}
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x30 pc=0xb436bf]
goroutine 1 [running]:
github.com/caddyserver/caddy/v2.(*Context).Value(0x182aaedbe078?, {0x1e2d340?, 0x25e0c90?})
<autogenerated>:1 +0x1f
github.com/caddyserver/caddy/v2/modules/caddyhttp.(*extraFieldsSlogHandler).Handle(_, {_, _}, {{0xc2635a2724e776c5, 0x67b02fd, 0x3ca5000}, {0x22f7b13, 0x17}, 0x0, 0x1b7943e, ...})
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/modules/caddyhttp/logging.go:308 +0x4c
log/slog.(*Logger).logAttrs(0x182aaea2bc30, {0x260a170?, 0x182aae96ad20?}, 0x0, {0x22f7b13, 0x17}, {0x0, 0x0, 0x0})
/home/m/static-php-cli/pkgroot/x86_64-linux/go-xcaddy/src/log/slog/logger.go:276 +0x277
log/slog.(*Logger).LogAttrs(...)
/home/m/static-php-cli/pkgroot/x86_64-linux/go-xcaddy/src/log/slog/logger.go:194
github.com/dunglas/frankenphp/caddy.(*FrankenPHPApp).Stop(0x182aae844300)
/home/m/frankenphp/caddy/app.go:182 +0x14b
github.com/caddyserver/caddy/v2.run.func2(...)
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/caddy.go:460
github.com/caddyserver/caddy/v2.run(0x25d1e48?, 0x1)
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/caddy.go:471 +0x977
github.com/caddyserver/caddy/v2.unsyncedDecodeAndRun({0x182aaee76400, 0x3ad, 0x400}, 0x1)
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/caddy.go:364 +0x17a
github.com/caddyserver/caddy/v2.changeConfig({0x22c19cb, 0x4}, {0x22c7b94, 0x7}, {0x182aaee76000, 0x3ad, 0x400}, {0x0, 0x0}, 0x1)
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/caddy.go:248 +0x959
github.com/caddyserver/caddy/v2.Load({0x182aaee76000, 0x3ad, 0x400}, 0x1)
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/caddy.go:137 +0x225
github.com/caddyserver/caddy/v2.Run(0x1fdb7a0?)
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/caddy.go:109 +0x3b
github.com/dunglas/frankenphp/caddy.cmdPHPServer({0x0?})
/home/m/frankenphp/caddy/php-server.go:320 +0x27b6
github.com/dunglas/frankenphp/caddy.init.4.func1.WrapCommandFuncForCobra.1(0x182aaee53808, {0x22c1a77?, 0x4?, 0x22c1a03?})
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/cmd/cobra.go:151 +0x2f
github.com/spf13/cobra.(*Command).execute(0x182aaee53808, {0x3cc96a0, 0x0, 0x0})
/home/m/go/pkg/mod/github.com/spf13/cobra@v1.10.2/command.go:1015 +0xb14
github.com/spf13/cobra.(*Command).ExecuteC(0x182aae7fbb08)
/home/m/go/pkg/mod/github.com/spf13/cobra@v1.10.2/command.go:1148 +0x465
github.com/spf13/cobra.(*Command).Execute(...)
/home/m/go/pkg/mod/github.com/spf13/cobra@v1.10.2/command.go:1071
github.com/caddyserver/caddy/v2/cmd.Main()
/home/m/go/pkg/mod/github.com/caddyserver/caddy/v2@v2.11.2/cmd/main.go:72 +0x65
main.main()
/home/m/frankenphp/caddy/frankenphp/main.go:14 +0xf
```
This restores it to exit cleanly again:
```bash
/home/m/frankenphp/caddy/frankenphp/main.go:14 +0xf
❯❯ frankenphp git:(main) 10:46 go build
❯❯ frankenphp git:(main) 10:58 ./frankenphp php-server
2026/03/08 03:58:01.533 WARN admin admin endpoint disabled
2026/03/08 03:58:01.533 WARN http.auto_https server is listening only on the HTTP port, so no automatic HTTPS will be applied to this server {"server_name": "php", "http_port": 80}
2026/03/08 03:58:01.533 INFO tls.cache.maintenance started background certificate maintenance {"cache": "0x850ebf79280"}
2026/03/08 03:58:01.556 INFO tls.cache.maintenance stopped background certificate maintenance {"cache": "0x850ebf79280"}
2026/03/08 03:58:01.556 INFO http servers shutting down with eternal grace period
Error: loading new config: http app module: start: listening on :80: listen tcp :80: bind: permission denied
```
FrankenPHP: Modern App Server for PHP
FrankenPHP is a modern application server for PHP built on top of the Caddy web server.
FrankenPHP gives superpowers to your PHP apps thanks to its stunning features: Early Hints, worker mode, real-time capabilities, hot reloading, automatic HTTPS, HTTP/2, and HTTP/3 support...
FrankenPHP works with any PHP app and makes your Laravel and Symfony projects faster than ever thanks to their official integrations with the worker mode.
FrankenPHP can also be used as a standalone Go library to embed PHP in any app using net/http.
Learn more on frankenphp.dev and in this slide deck:
Getting Started
Install Script
On Linux and macOS, copy this line into your terminal to automatically install an appropriate version for your platform:
curl https://frankenphp.dev/install.sh | sh
On Windows, run this in PowerShell:
irm https://frankenphp.dev/install.ps1 | iex
Standalone Binary
We provide FrankenPHP binaries for Linux, macOS and Windows containing PHP 8.5.
Linux binaries are statically linked, so they can be used on any Linux distribution without installing any dependency. macOS binaries are also self-contained. They contain most popular PHP extensions. Windows archives contain the official PHP binary for Windows.
rpm Packages
Our maintainers offer rpm packages for all systems using dnf. To install, run:
sudo dnf install https://rpm.henderkes.com/static-php-1-0.noarch.rpm
sudo dnf module enable php-zts:static-8.5 # 8.2-8.5 available
sudo dnf install frankenphp
Installing extensions: sudo dnf install php-zts-<extension>
For extensions not available by default, use PIE:
sudo dnf install pie-zts
sudo pie-zts install asgrim/example-pie-extension
deb Packages
Our maintainers offer deb packages for all systems using apt. To install, run:
VERSION=85 # 82-85 available
sudo curl https://pkg.henderkes.com/api/packages/${VERSION}/debian/repository.key -o /etc/apt/keyrings/static-php${VERSION}.asc
echo "deb [signed-by=/etc/apt/keyrings/static-php${VERSION}.asc] https://pkg.henderkes.com/api/packages/${VERSION}/debian php-zts main" | sudo tee -a /etc/apt/sources.list.d/static-php${VERSION}.list
sudo apt update
sudo apt install frankenphp
Installing extensions: sudo apt install php-zts-<extension>
For extensions not available by default, use PIE:
sudo apt install pie-zts
sudo pie-zts install asgrim/example-pie-extension
apk Packages
Our maintainers offer apk packages for all systems using apk. To install, run:
VERSION=85 # 82-85 available
echo "https://pkg.henderkes.com/api/packages/${VERSION}/alpine/main/php-zts" | sudo tee -a /etc/apk/repositories
KEYFILE=$(curl -sJOw '%{filename_effective}' https://pkg.henderkes.com/api/packages/${VERSION}/alpine/key)
sudo mv ${KEYFILE} /etc/apk/keys/ &&
sudo apk update &&
sudo apk add frankenphp
Installing extensions: sudo apk add php-zts-<extension>
For extensions not available by default, use PIE:
sudo apk add pie-zts
sudo pie-zts install asgrim/example-pie-extension
Homebrew
FrankenPHP is also available as a Homebrew package for macOS and Linux.
brew install dunglas/frankenphp/frankenphp
Installing extensions: Use PIE.
Usage
To serve the content of the current directory, run:
frankenphp php-server
You can also run command-line scripts with:
frankenphp php-cli /path/to/your/script.php
For the deb and rpm packages, you can also start the systemd service:
sudo systemctl start frankenphp
Docker
Alternatively, Docker images are available:
docker run -v .:/app/public \
-p 80:80 -p 443:443 -p 443:443/udp \
dunglas/frankenphp
Go to https://localhost, and enjoy!
Tip
Do not attempt to use
https://127.0.0.1. Usehttps://localhostand accept the self-signed certificate. Use theSERVER_NAMEenvironment variable to change the domain to use.
Docs
- Classic mode
- Worker mode
- Early Hints support (103 HTTP status code)
- Real-time
- Logging
- Hot reloading
- Efficiently Serving Large Static Files
- Configuration
- Writing PHP Extensions in Go
- Docker images
- Deploy in production
- Performance optimization
- Create standalone, self-executable PHP apps
- Create static binaries
- Compile from sources
- Monitoring FrankenPHP
- WordPress integration
- Laravel integration
- Known issues
- Demo app (Symfony) and benchmarks
- Go library documentation
- Contributing and debugging

