update readme

2 files changed, 28 insertions, 2 deletions

diff --git a/README.md b/README.md
index 128b6e3..e48997b 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,32 @@ Hello, World!
 
 The script, [hello.php](./hello.php), is executed on PHPHP on PHP.
 
+### PHPHP on PHPHP on PHP
+
+Edit this line as the following:
+
+```diff
+ if (defined('PHPHP')) {
+-    if (PHPHP < 2) {
++    if (PHPHP < 3) {
+         echo "Running" . str_repeat(" on PHPHP", PHPHP) . " on PHP\n";
+```
+
+Then, execute `index.php`. I recommend that you enable JIT.
+
+```bash
+php -d opcache.enable_cli=on -d opcache.jit=on -d opcache.jit_buffer_size=1G index.php
+```
+
+It will execute hello world on PHPHP on PHPHP on PHP.
+
+```
+Running on PHP
+Running on PHPHP on PHP
+Running on PHPHP on PHPHP on PHP
+Hello, World!
+```
+
 ## Talks
 
 [Talk in PHPerKaigi 2025 (in Japanese)](https://fortee.jp/phperkaigi-2025/proposal/ef8480fc-1403-4020-9f24-aca9361f51e4)
diff --git a/index.php b/index.php
index d8f9ce5..a7c49ee 100644
--- a/index.php
+++ b/index.php
@@ -1195,8 +1195,8 @@ $env['funcs'] = [];
 $env['consts'] = [];
 
 if (defined('PHPHP')) {
-    if (PHPHP === 1) {
-        echo "Running on PHPHP on PHP\n";
+    if (PHPHP < 2) {
+        echo "Running" . str_repeat(" on PHPHP", PHPHP) . " on PHP\n";
         $file = './index.php';
     } else {
         $file = './hello.php';