diff --git a/.github/workflows/demo.yml b/.github/workflows/demo.yml
new file mode 100644
index 00000000..092979b1
--- /dev/null
+++ b/.github/workflows/demo.yml
@@ -0,0 +1,60 @@
+# Simple workflow for deploying static content to GitHub Pages
+name: Deploy static content to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Build PHP WASM
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: false
+          tags: soyuka/php-wasm:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+      - name: Setup Pages
+        uses: actions/configure-pages@v3
+      - name: Build website
+				working-directory: demo
+				run: |
+					docker create --name=php-wasm soyuka/php-wasm:latest
+					mkdir -p public/ dist/
+					docker cp php-wasm:/build/php-web.mjs ./dist
+					docker cp php-wasm:/build/php-web.wasm ./public
+          docker run -v $(pwd)/src:/src -v $(pwd)/public:/public -v $(pwd)/dist:/dist php-wasm python3 /emsdk/upstream/emscripten/tools/file_packager.py /public/php-web.data --use-preload-cache --lz4 --preload "/src" --js-output=/dist/php-web.data.js --no-node --exclude '*/.*' --export-name=createPhpModule
+          sed '/--pre-js/r dist/php-web.data.js' dist/php-web.mjs > public/php-web.mjs
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: 'demo/public'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v2
diff --git a/Dockerfile b/Dockerfile
index bfc4c0d1..05b84f68 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -40,7 +40,7 @@ WORKDIR /src/sqlite
 RUN emcc -Oz -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_DISABLE_LFS -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_THREADSAFE=0 -DSQLITE_ENABLE_NORMALIZE -c sqlite3.c -o sqlite3.o
 
 FROM build_tool as php_src
-ARG PHP_BRANCH=PHP-8.2.9
+ARG PHP_BRANCH=PHP-8.2.10
 RUN git clone https://github.com/php/php-src.git php-src \
 		--branch $PHP_BRANCH \
 		--single-branch \
@@ -49,7 +49,7 @@ RUN git clone https://github.com/php/php-src.git php-src \
 FROM php_src AS php-wasm
 ARG WASM_ENVIRONMENT=web
 ARG ASSERTIONS=0
-ARG OPTIMIZE=-O2
+ARG OPTIMIZE=-O1
 # TODO: find a way to keep this, it can't be empty if defined...
 # ARG PRE_JS=
 ARG INITIAL_MEMORY=256mb
@@ -60,8 +60,7 @@ ENV LIBXML_LIBS "-L/src/usr/lib"
 ENV LIBXML_CFLAGS "-I/src/usr/include/libxml2"
 ENV SQLITE_CFLAGS "-I/src/usr/include/sqlite3"
 ENV SQLITE_LIBS "-L/src/usr/lib"
-WORKDIR /src/php-src
-RUN ./buildconf --force \
+RUN cd /src/php-src && ./buildconf --force \
     && emconfigure ./configure \
 		--enable-embed=static \
 		--with-layout=GNU  \
@@ -90,11 +89,11 @@ RUN ./buildconf --force \
 		--enable-pdo       \
 		--with-pdo-sqlite  \
 		--with-sqlite3
-RUN emmake make -j8
+RUN cd /src/php-src && emmake make -j8
 # PHP7 outputs a libphp7 whereas php8 a libphp
-RUN bash -c '[[ -f .libs/libphp7.la   ]] && mv .libs/libphp7.la .libs/libphp.la && mv .libs/libphp7.a .libs/libphp.a && mv .libs/libphp7.lai .libs/libphp.lai || exit 0'
+RUN cd /src/php-src && bash -c '[[ -f .libs/libphp7.la ]] && mv .libs/libphp7.la .libs/libphp.la && mv .libs/libphp7.a .libs/libphp.a && mv .libs/libphp7.lai .libs/libphp.lai || exit 0'
 COPY ./source /src/source
-RUN emcc $OPTIMIZE \
+RUN cd /src/php-src && emcc $OPTIMIZE \
 		-I .     \
 		-I Zend  \
 		-I main  \
@@ -103,7 +102,7 @@ RUN emcc $OPTIMIZE \
 		/src/source/phpw.c \
 		-o /src/phpw.o \
 		-s ERROR_ON_UNDEFINED_SYMBOLS=0
-RUN mkdir /build && emcc $OPTIMIZE \
+RUN mkdir /build && cd /src/php-src && emcc $OPTIMIZE \
 	-o /build/php-$WASM_ENVIRONMENT.mjs \
 	--llvm-lto 2                     \
 	-s EXPORTED_FUNCTIONS='["_phpw", "_phpw_flush", "_phpw_exec", "_phpw_run", "_chdir", "_setenv", "_php_embed_init", "_php_embed_shutdown", "_zend_eval_string"]' \
@@ -123,3 +122,4 @@ RUN mkdir /build && emcc $OPTIMIZE \
 	# -s DECLARE_ASM_MODULE_EXPORTS=0 \
 	-lidbfs.js                       \
 		/src/phpw.o /src/usr/lib/sqlite3.o .libs/libphp.a /src/usr/lib/libxml2.a
+RUN rm -r /src/*
diff --git a/demo/.gitignore b/demo/.gitignore
index ddb38e88..de3b0dc5 100644
--- a/demo/.gitignore
+++ b/demo/.gitignore
@@ -1,3 +1,4 @@
 dist/
-public/
-!public/index.html
+public/php-web.mjs
+public/php-web.data
+public/php-web.wasm
diff --git a/demo/public/index.html b/demo/public/index.html
index 8f6a4a89..ae5901d4 100644
--- a/demo/public/index.html
+++ b/demo/public/index.html
@@ -1,24 +1,43 @@
-<iframe id="output"></iframe>
+<iframe id="output" width="100%" height="50%" frameBorder="0"></iframe>
 <script type="module">
-	import Module from "./php-web.mjs";
-	const STR = "string";
-	const output = document.getElementById('output');
-	const buffer = ''
+	import phpBinary from "./php-web.mjs";
 
-	Module({
-		print(data) {
-			buffer += data;
-			// output.setAttribute('srcdoc', data);
-		},
-		printErr(data) {
-			if (data) {
-				console.log("stderr: ", data);
+	async function main() {
+		const output = document.getElementById('output')
+		const buffer = [];
+		const {ccall, FS} = await phpBinary({
+			print(data) {
+				buffer.push(data);
 			}
-		},
-	}).then(({ ccall, FS, IDBFS }) => {
-		console.log(ccall("phpw_exec", STR, [STR], ["phpversion();"]));
+		})
 
-		// Note that `/src` is the path we used when preloading!
-		// ccall("phpw", null, [STR], ["/src/index.php"]);
+		console.log(ccall("phpw_exec", "string", ["string"], ["phpversion();"]));
+
+		window.FS = FS;
+		window.run = () => {
+			// Note that `/src` is the path we used when preloading!
+			ccall("phpw", null, ["string"], ["/src/index.php"]);
+			output.contentWindow.document.body.innerHTML = buffer.join('');
+			buffer.length = 0;
+		}
+
+		run();
+	}
+
+	main();
+</script>
+<div id="monaco" style="min-height: 100px"></div>
+<script type="module">
+	import * as monaco from 'https://cdn.jsdelivr.net/npm/monaco-editor@0.39.0/+esm';
+	const editor = monaco.editor.create(document.getElementById('monaco'));
+	// FS is documented at https://emscripten.org/docs/api_reference/Filesystem-API.html
+	// everything is synchronous
+	const model = editor.getModel();
+	model.setLanguage('php');
+	model.setValue(window.FS.readFile('/src/index.php', {encoding: 'utf8'}).toString());
+	model.onDidChangeContent((v) => {
+		window.FS.unlink('/src/index.php')
+		window.FS.writeFile('/src/index.php', model.getValue());
+		window.run();
 	});
 </script>
diff --git a/demo/src/index.php b/demo/src/index.php
index 83f15493..61ace196 100644
--- a/demo/src/index.php
+++ b/demo/src/index.php
@@ -1,3 +1,2 @@
 <?php
-
 phpinfo();
diff --git a/source/phpw.c b/source/phpw.c
index 4b60591c..4a7c3238 100644
--- a/source/phpw.c
+++ b/source/phpw.c
@@ -13,13 +13,13 @@ int main() {
 void phpw_flush()
 {
   fprintf(stdout, "\n");
-  fflush(stdout);
   fprintf(stderr, "\n");
-  fflush(stderr);
 }
 
 char *EMSCRIPTEN_KEEPALIVE phpw_exec(char *code)
 {
+  // This sets USE_ZEND_ALLOC=0 to avoid nunmap errors
+  setenv("USE_ZEND_ALLOC", "0", 1);
   php_embed_init(0, NULL);
   char *retVal = NULL;
 
@@ -43,6 +43,7 @@ char *EMSCRIPTEN_KEEPALIVE phpw_exec(char *code)
 
 void EMSCRIPTEN_KEEPALIVE phpw_run(char *code)
 {
+  setenv("USE_ZEND_ALLOC", "0", 1);
   php_embed_init(0, NULL);
   zend_try
   {
@@ -63,6 +64,7 @@ int EMBED_SHUTDOWN = 1;
 
 void phpw(char *file)
 {
+  setenv("USE_ZEND_ALLOC", "0", 1);
   if (EMBED_SHUTDOWN == 0) {
 	  php_embed_shutdown();
   }