diff --git a/Containerfile b/Containerfile
new file mode 100644
index 0000000..4a13f85
--- /dev/null
+++ b/Containerfile
@@ -0,0 +1,7 @@
+FROM php
+
+COPY index.php /app/index.php
+
+WORKDIR /app
+
+CMD php index.php
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..ab5f113
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1755186698,
+        "narHash": "sha256-wNO3+Ks2jZJ4nTHMuks+cxAiVBGNuEBXsT29Bz6HASo=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "fbcf476f790d8a217c3eab4e12033dc4a0f6d23c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..f8fcf16
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,21 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    inputs:
+    let
+      system = "x86_64-linux";
+      pkgs = import inputs.nixpkgs { inherit system; };
+    in
+    {
+      devShells.${system}.default = pkgs.mkShell {
+        packages = with pkgs; [
+          php
+          phpPackages.composer
+          phpactor
+        ];
+      };
+    };
+}
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..e6744ba
--- /dev/null
+++ b/index.php
@@ -0,0 +1,3 @@
+<?php
+
+echo "Hi, PHP Thames Valley!";
diff --git a/notes.adoc b/notes.adoc
new file mode 100644
index 0000000..eb401a7
--- /dev/null
+++ b/notes.adoc
@@ -0,0 +1,105 @@
+= podman
+
+== PHP from the command line
+
+----
+podman run --rm php php -v
+
+PHP 8.4.11 (cli) (built: Aug 12 2025 22:28:40) (NTS)
+Copyright (c) The PHP Group
+Built by https://github.com/docker-library/php
+Zend Engine v4.4.11, Copyright (c) Zend Technologies
+    with Zend OPcache v8.4.11, Copyright (c), by Zend Technologies
+----
+
+=== Running a different PHP version
+
+----
+podman run --rm php:8.3 php -v
+
+PHP 8.3.24 (cli) (built: Aug 12 2025 22:30:04) (NTS)
+Copyright (c) The PHP Group
+Zend Engine v4.3.24, Copyright (c) Zend Technologies
+    with Zend OPcache v8.3.24, Copyright (c), by Zend Technologies
+---
+----
+
+=== Running a file
+
+[,shell]
+----
+podman run --rm -it \
+  -v $(pwd):/app \
+  -w /app \
+  php \
+  php index.php
+----
+
+---
+
+podman build .
+STEP 1/2: FROM php
+STEP 2/2: CMD php -v
+COMMIT
+--> d1ec5296cbf0
+d1ec5296cbf0da21054b4261a0bb72f66449fe8e8f51b071e53df64e6f83eff4
+
+podman run --rm d1ec5296cbf0
+PHP 8.4.11 (cli) (built: Aug 12 2025 22:28:40) (NTS)
+Copyright (c) The PHP Group
+Built by https://github.com/docker-library/php
+Zend Engine v4.4.11, Copyright (c) Zend Technologies
+    with Zend OPcache v8.4.11, Copyright (c), by Zend Technologies
+
+=== Building a container with code inside
+
+podman build .
+
+STEP 1/4: FROM php
+STEP 2/4: COPY index.php /app/index.php
+--> b592e9b3b69f
+STEP 3/4: WORKDIR /app
+--> 8f591440552a
+STEP 4/4: CMD php index.php
+COMMIT
+--> ec4c5890c8a7
+ec4c5890c8a75e93e1bb768f998e49ae7d2bf005e5e7c2a57dd2813b881e9758
+
+podman run --rm ec4c5890c8a7
+
+Hi, PHP Thames Valley!
+
+=== Using shell.nix
+
+nix-shell
+
+[nix-shell:~/php-thames-valley]$ php index.php
+
+Hi, PHP Thames Valley
+
+==== Running a command without entering a shell
+
+nix-shell --run "php index.php"
+
+Hi, PHP Thames Valley!
+
+== Adding PHP tools
+
+nix-shell --run "composer --version"
+
+Composer version 2.8.5 2025-01-21 15:23:40
+PHP version 8.4.11 (/nix/store/s4kv9bzqawhqcyjg9xm2hji3jap6d6kd-php-with-extensions-8.4.11/bin/php)
+
+nix-shell --run "phpactor --version"
+
+Phpactor 2025.07.25.0
+
+---
+
+inputs = {
+  nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+};
+
+is the same as 
+
+inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";