test(php): make smoke test bounded via pcntl alarm

Author: zemaj

php/tests/smoke.php

@@ -8,8 +8,29 @@
 $secret = getenv('CODE_BRIDGE_SECRET') ?: 'dev-secret';
 
 $client = new Client(new BridgeConfig($url, $secret, 'php-test'));
-$client->start();
 $client->sendConsole('smoke test console');
 $client->sendError('smoke test error');
-$client->stop();
+
+if (!function_exists('pcntl_fork')) {
+  echo "pcntl not available; skipping php smoke\n";
+  exit(0);
+}
+
+$pid = pcntl_fork();
+if ($pid === -1) {
+  fwrite(STDERR, "fork failed\n");
+  exit(1);
+}
+
+if ($pid === 0) {
+  pcntl_async_signals(true);
+  pcntl_signal(SIGALRM, function () use ($client) {
+    $client->stop();
+  });
+  pcntl_alarm(4);
+  $client->start();
+  exit(0);
+}
+
+pcntl_waitpid($pid, $status);
 echo "php smoke ok\n";