diff --git a/public/simulate-nis2.php b/public/simulate-nis2.php
index ccb969f..f4e32e1 100644
--- a/public/simulate-nis2.php
+++ b/public/simulate-nis2.php
@@ -52,7 +52,14 @@ if ($simParam === 'sim06') {
 // ── Avvia subprocess (pattern lg231 runCommand) ───────────────────────────────
 $descriptors = [0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'w']];
 $cwd  = dirname($scriptPath);
-$cmd  = PHP_BINARY . ' ' . escapeshellarg($scriptPath);
+// PHP_BINARY in PHP-FPM punta a php-fpm, non al CLI → cerca il binario CLI corretto
+$phpBin = PHP_BINARY;
+if (str_contains($phpBin, 'fpm') || !is_executable($phpBin)) {
+    foreach (['/usr/bin/php' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION, '/usr/bin/php', 'php'] as $try) {
+        if (is_executable($try) || shell_exec("which $try 2>/dev/null")) { $phpBin = $try; break; }
+    }
+}
+$cmd  = $phpBin . ' ' . escapeshellarg($scriptPath);
 $proc = proc_open($cmd, $descriptors, $pipes, $cwd, $env);
 
 if (!is_resource($proc)) {