diff --git a/README.md b/README.md
index 2d5969195..1524a2e91 100644
--- a/README.md
+++ b/README.md
@@ -106,7 +106,7 @@ phpw(string filePath): void
 ```javascript
 const STR = 'string';
 ccall("phpw", null, [STR], ["public/index.php"]);
-console.log(ccall("phpw_exec", STR, [STR], ["phpversion();"]);
+console.log(ccall("phpw_exec", STR, [STR], ["phpversion();"]));
 ```
 
 [More about how to call exposed functions](https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html?highlight=call#interacting-with-code-ccall-cwrap)
diff --git a/demo/.gitignore b/demo/.gitignore
new file mode 100644
index 000000000..ddb38e888
--- /dev/null
+++ b/demo/.gitignore
@@ -0,0 +1,3 @@
+dist/
+public/
+!public/index.html
diff --git a/demo/public/index.html b/demo/public/index.html
new file mode 100644
index 000000000..8f6a4a890
--- /dev/null
+++ b/demo/public/index.html
@@ -0,0 +1,24 @@
+<iframe id="output"></iframe>
+<script type="module">
+	import Module from "./php-web.mjs";
+	const STR = "string";
+	const output = document.getElementById('output');
+	const buffer = ''
+
+	Module({
+		print(data) {
+			buffer += data;
+			// output.setAttribute('srcdoc', data);
+		},
+		printErr(data) {
+			if (data) {
+				console.log("stderr: ", 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"]);
+	});
+</script>
diff --git a/demo/src/index.php b/demo/src/index.php
new file mode 100644
index 000000000..83f154933
--- /dev/null
+++ b/demo/src/index.php
@@ -0,0 +1,3 @@
+<?php
+
+phpinfo();
diff --git a/index.html b/index.html
deleted file mode 100644
index 6e57e3e81..000000000
--- a/index.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<script type="module">
-	import Module from "./build/php-web.mjs";
-
-	const NUM = "number";
-	const STR = "string";
-	let body = "";
-	const show = () => {
-		window.document.body.innerHTML = body;
-	};
-	let timeout = null;
-
-	Module({
-		onAbort(reason) {
-			console.error(`WASM aborted: ${reason}`);
-		},
-		print(data) {
-			if (data) {
-				body += data;
-				clearTimeout(timeout);
-				timeout = setTimeout(() => show());
-			}
-		},
-		printErr(data) {
-			if (data) {
-				console.log("stderr: ", data);
-			}
-		},
-	}).then(({ ccall, FS, IDBFS }) => {
-		ccall("pib_init");
-		const phpVersion = ccall("pib_exec", STR, [STR], ["phpversion();"]);
-		console.log("php version", phpVersion);
-		ccall("pib_exec", STR, [STR], ["phpinfo();"]);
-	});
-</script>