apply code suggestions

Co-authored-by: John Paul E. Balandan, CPA <paulbalandan@gmail.com>

Author: michalsn

system/Boot.php

@@ -102,8 +102,8 @@ public static function bootWorker(Paths $paths): CodeIgniter
         static::setExceptionHandler();
         static::initializeKint();
 
-        // Note: We skip config caching in worker mode
-        // as it may cause issues with state between requests
+        static::checkOptimizationsForWorker();
+
         static::autoloadHelpers();
 
         return Boot::initializeCodeIgniter();
@@ -366,6 +366,20 @@ protected static function checkMissingExtensions(): void
         exit(EXIT_ERROR);
     }
 
+    protected static function checkOptimizationsForWorker(): void
+    {
+        if (class_exists(Optimize::class)) {
+            $optimize = new Optimize();
+
+            if ($optimize->configCacheEnabled || $optimize->locatorCacheEnabled) {
+                echo 'Optimization settings (configCacheEnabled, locatorCacheEnabled) '
+                    . 'must be disabled in Config\Optimize when running in Worker Mode.';
+
+                exit(EXIT_ERROR);
+            }
+        }
+    }
+
     protected static function initializeKint(): void
     {
         service('autoloader')->initializeKint(CI_DEBUG);

system/Database/BaseConnection.php

@@ -512,7 +512,7 @@ abstract protected function _close();
      */
     public function ping(): bool
     {
-        if (! $this->connID) {
+        if ($this->connID === false) {
             return false;
         }
 

system/Database/Config.php

@@ -161,10 +161,6 @@ protected static function ensureFactory()
      */
     public static function reconnectForWorkerMode(): void
     {
-        if (static::$instances === []) {
-            return;
-        }
-
         foreach (static::$instances as $connection) {
             $connection->reconnect();
         }

system/Session/Handlers/RedisHandler.php

@@ -305,7 +305,7 @@ public function close(): bool
             try {
                 $pingReply = $this->redis->ping();
 
-                if (in_array($pingReply, [true, '+PONG'], true) && (isset($this->lockKey) && ! $this->releaseLock())) {
+                if (in_array($pingReply, [true, '+PONG'], true) && isset($this->lockKey) && ! $this->releaseLock()) {
                     return false;
                 }
             } catch (RedisException $e) {

user_guide_src/source/installation/running.rst

@@ -164,6 +164,9 @@ Worker Mode with FrankenPHP
 
 .. versionadded:: 4.7.0
 
+.. important:: Worker Mode is currently **experimental**. The only officially supported
+    worker implementation is **FrankenPHP**, which is backed by the PHP Foundation.
+
 FrankenPHP is a modern PHP application server that supports Worker Mode, allowing
 your application to handle multiple requests within the same PHP process for
 improved performance.