diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index 569b8f417eda..a720e96a4661 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -1176,7 +1176,7 @@ private function registerDebugConfiguration(array $config, ContainerBuilder $con
             $container->setDefinition('debug.log_processor', $definition);
 
             $container->register('debug.debug_logger_configurator', DebugLoggerConfigurator::class)
-                ->setArguments([new Reference('debug.log_processor')]);
+                ->setArguments([new Reference('debug.log_processor'), '%kernel.runtime_mode.web%']);
         }
     }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/debug_prod.php b/src/Symfony/Bundle/FrameworkBundle/Resources/config/debug_prod.php
index af6ca27dcabf..074f0128d976 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/debug_prod.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/debug_prod.php
@@ -32,6 +32,7 @@
             ->tag('monolog.logger', ['channel' => 'php'])
 
         ->set('debug.debug_handlers_listener', DebugHandlersListener::class)
+            ->args([null, param('kernel.runtime_mode.web')])
             ->tag('kernel.event_subscriber')
 
         ->set('debug.file_link_formatter', FileLinkFormatter::class)
diff --git a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
index 40eb4978b1b3..ed90f4716c7f 100644
--- a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
@@ -97,7 +97,7 @@ public static function createSystemCache(string $namespace, int $defaultLifetime
             return $opcache;
         }
 
-        if (\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && !filter_var(\ini_get('apc.enable_cli'), \FILTER_VALIDATE_BOOL)) {
+        if ('cli' === \PHP_SAPI && !filter_var(\ini_get('apc.enable_cli'), \FILTER_VALIDATE_BOOL)) {
             return $opcache;
         }
 
diff --git a/src/Symfony/Component/Cache/Adapter/ChainAdapter.php b/src/Symfony/Component/Cache/Adapter/ChainAdapter.php
index ffaa56f3ed3e..8c2e7e111b00 100644
--- a/src/Symfony/Component/Cache/Adapter/ChainAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/ChainAdapter.php
@@ -53,7 +53,7 @@ public function __construct(array $adapters, int $defaultLifetime = 0)
             if (!$adapter instanceof CacheItemPoolInterface) {
                 throw new InvalidArgumentException(sprintf('The class "%s" does not implement the "%s" interface.', get_debug_type($adapter), CacheItemPoolInterface::class));
             }
-            if (\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && $adapter instanceof ApcuAdapter && !filter_var(\ini_get('apc.enable_cli'), \FILTER_VALIDATE_BOOL)) {
+            if ('cli' === \PHP_SAPI && $adapter instanceof ApcuAdapter && !filter_var(\ini_get('apc.enable_cli'), \FILTER_VALIDATE_BOOL)) {
                 continue; // skip putting APCu in the chain when the backend is disabled
             }
 
diff --git a/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php b/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php
index 4260cf5766dd..41ea8604c495 100644
--- a/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/PhpFilesAdapter.php
@@ -61,7 +61,7 @@ public static function isSupported()
     {
         self::$startTime ??= $_SERVER['REQUEST_TIME'] ?? time();
 
-        return \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOL));
+        return \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOL));
     }
 
     public function prune(): bool
diff --git a/src/Symfony/Component/Cache/Traits/ContractsTrait.php b/src/Symfony/Component/Cache/Traits/ContractsTrait.php
index 476883a679e3..083ce1f9dbd3 100644
--- a/src/Symfony/Component/Cache/Traits/ContractsTrait.php
+++ b/src/Symfony/Component/Cache/Traits/ContractsTrait.php
@@ -44,7 +44,7 @@ public function setCallbackWrapper(?callable $callbackWrapper): callable
         if (!isset($this->callbackWrapper)) {
             $this->callbackWrapper = LockRegistry::compute(...);
 
-            if (\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+            if (\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
                 $this->setCallbackWrapper(null);
             }
         }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 8a5b4b1467a5..ff11062b99b9 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -340,7 +340,7 @@ class %s extends {$options['class']}
 
 use Symfony\Component\DependencyInjection\Dumper\Preloader;
 
-if (in_array(PHP_SAPI, ['cli', 'phpdbg'], true)) {
+if (in_array(PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
     return;
 }
 
@@ -388,6 +388,7 @@ class %s extends {$options['class']}
     'container.build_hash' => '$hash',
     'container.build_id' => '$id',
     'container.build_time' => $time,
+    'container.runtime_mode' => \\in_array(\\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\\DIRECTORY_SEPARATOR.'Container{$hash}');
 
 EOF;
@@ -1591,7 +1592,7 @@ private function addDefaultParametersMethod(): string
             $export = $this->exportParameters([$value], '', 12, $hasEnum);
             $export = explode('0 => ', substr(rtrim($export, " ]\n"), 2, -1), 2);
 
-            if ($hasEnum || preg_match("/\\\$container->(?:getEnv\('(?:[-.\w\\\\]*+:)*+\w++'\)|targetDir\.'')/", $export[1])) {
+            if ($hasEnum || preg_match("/\\\$container->(?:getEnv\('(?:[-.\w\\\\]*+:)*+\w*+'\)|targetDir\.'')/", $export[1])) {
                 $dynamicPhp[$key] = sprintf('%s%s => %s,', $export[0], $this->export($key), $export[1]);
                 $this->dynamicParameters[$key] = true;
             } else {
diff --git a/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php b/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php
index 7c77e1a1490c..bae5e289d7ec 100644
--- a/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php
+++ b/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php
@@ -154,6 +154,9 @@ public function getEnv(string $prefix, string $name, \Closure $getEnv): mixed
 
         $returnNull = false;
         if ('' === $prefix) {
+            if ('' === $name) {
+                return null;
+            }
             $returnNull = true;
             $prefix = 'string';
         }
diff --git a/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php b/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php
index 9c66e1f94416..4719d2126cca 100644
--- a/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php
+++ b/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php
@@ -41,7 +41,7 @@ public function get(string $name): array|bool|string|int|float|\UnitEnum|null
                     return $placeholder; // return first result
                 }
             }
-            if (!preg_match('/^(?:[-.\w\\\\]*+:)*+\w++$/', $env)) {
+            if (!preg_match('/^(?:[-.\w\\\\]*+:)*+\w*+$/', $env)) {
                 throw new InvalidArgumentException(sprintf('Invalid %s name: only "word" characters are allowed.', $name));
             }
             if ($this->has($name) && null !== ($defaultValue = parent::get($name)) && !\is_string($defaultValue)) {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10_as_files.txt
index 25d0b3257f0d..1e6b86f8dcd9 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10_as_files.txt
@@ -154,6 +154,7 @@ return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => %d,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
index 0b367ccb4456..cfe6777b10b6 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
@@ -787,6 +787,7 @@ return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => %d,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt
index 7ef2e555a452..0f64f93ac696 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories.txt
@@ -604,6 +604,7 @@ return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => 1563381341,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories_with_tagged_iterrator.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories_with_tagged_iterrator.txt
index 61ea67f6b952..17bc9ed6e6e8 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories_with_tagged_iterrator.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_inlined_factories_with_tagged_iterrator.txt
@@ -119,6 +119,7 @@ return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => %d,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_lazy_inlined_factories.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_lazy_inlined_factories.txt
index 07dd32230637..909e1dcc15b8 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_lazy_inlined_factories.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_lazy_inlined_factories.txt
@@ -187,6 +187,7 @@ return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => 1563381341,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deprecated_parameters_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deprecated_parameters_as_files.txt
index a16e843217ca..53c99dc7106b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deprecated_parameters_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deprecated_parameters_as_files.txt
@@ -195,6 +195,7 @@ return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => %d,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt
index fd9d7b20c400..c06a6c1458f5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy_as_files.txt
@@ -164,6 +164,7 @@ return new \Container%s\Symfony_DI_PhpDumper_Service_Non_Shared_Lazy_As_File([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => %d,
+    'container.runtime_mode' => \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? 'web=0' : 'web=1',
 ], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/ErrorHandler/Debug.php b/src/Symfony/Component/ErrorHandler/Debug.php
index 641c273446f8..d54a38c4cac1 100644
--- a/src/Symfony/Component/ErrorHandler/Debug.php
+++ b/src/Symfony/Component/ErrorHandler/Debug.php
@@ -22,7 +22,7 @@ public static function enable(): ErrorHandler
     {
         error_reporting(-1);
 
-        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
             ini_set('display_errors', 0);
         } elseif (!filter_var(\ini_get('log_errors'), \FILTER_VALIDATE_BOOL) || \ini_get('error_log')) {
             // CLI - display errors only if they're not already logged to STDERR
diff --git a/src/Symfony/Component/ErrorHandler/ErrorHandler.php b/src/Symfony/Component/ErrorHandler/ErrorHandler.php
index c5339dc1ad12..1ee29e1b8e71 100644
--- a/src/Symfony/Component/ErrorHandler/ErrorHandler.php
+++ b/src/Symfony/Component/ErrorHandler/ErrorHandler.php
@@ -640,7 +640,7 @@ public static function handleFatalError(array $error = null): void
      */
     private function renderException(\Throwable $exception): void
     {
-        $renderer = \in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) ? new CliErrorRenderer() : new HtmlErrorRenderer($this->debug);
+        $renderer = \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? new CliErrorRenderer() : new HtmlErrorRenderer($this->debug);
 
         $exception = $renderer->render($exception);
 
diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index 29db6297f183..dca93df616a0 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -433,7 +433,7 @@ public function send(/* bool $flush = true */): static
             fastcgi_finish_request();
         } elseif (\function_exists('litespeed_finish_request')) {
             litespeed_finish_request();
-        } elseif (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+        } elseif (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
             static::closeOutputBuffers(0, true);
             flush();
         }
diff --git a/src/Symfony/Component/HttpKernel/CHANGELOG.md b/src/Symfony/Component/HttpKernel/CHANGELOG.md
index 5714af6e68dc..65b4a6aadd7e 100644
--- a/src/Symfony/Component/HttpKernel/CHANGELOG.md
+++ b/src/Symfony/Component/HttpKernel/CHANGELOG.md
@@ -11,6 +11,7 @@ CHANGELOG
  * Add argument `$validationFailedStatusCode` to `#[MapQueryString]` and `#[MapRequestPayload]`
  * Add argument `$debug` to `Logger`
  * Add class `DebugLoggerConfigurator`
+ * Add parameters `kernel.runtime_mode` and `kernel.runtime_mode.*`, all set from env var `APP_RUNTIME_MODE`
  * Deprecate `Kernel::stripComments()`
  * Support the `!` character at the beginning of a string as a negation operator in the url filter of the profiler
  * Deprecate `UriSigner`, use `UriSigner` from the HttpFoundation component instead
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index 4f518e7bbc2f..ce02b545bf17 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -42,8 +42,9 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
     private ?RequestStack $requestStack;
     private DataDumperInterface|Connection|null $dumper;
     private mixed $sourceContextProvider;
+    private bool $webMode;
 
-    public function __construct(Stopwatch $stopwatch = null, string|FileLinkFormatter $fileLinkFormat = null, string $charset = null, RequestStack $requestStack = null, DataDumperInterface|Connection $dumper = null)
+    public function __construct(Stopwatch $stopwatch = null, string|FileLinkFormatter $fileLinkFormat = null, string $charset = null, RequestStack $requestStack = null, DataDumperInterface|Connection $dumper = null, bool $webMode = null)
     {
         $fileLinkFormat = $fileLinkFormat ?: \ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format');
         $this->stopwatch = $stopwatch;
@@ -51,6 +52,7 @@ public function __construct(Stopwatch $stopwatch = null, string|FileLinkFormatte
         $this->charset = $charset ?: \ini_get('php.output_encoding') ?: \ini_get('default_charset') ?: 'UTF-8';
         $this->requestStack = $requestStack;
         $this->dumper = $dumper;
+        $this->webMode = $webMode ?? !\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true);
 
         // All clones share these properties by reference:
         $this->rootRefs = [
@@ -231,7 +233,7 @@ public function __destruct()
                 --$i;
             }
 
-            if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && stripos($h[$i], 'html')) {
+            if ($this->webMode) {
                 $dumper = new HtmlDumper('php://output', $this->charset);
                 $dumper->setDisplayOptions(['fileLinkFormat' => $this->fileLinkFormat]);
             } else {
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/LoggerPass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/LoggerPass.php
index cfe35b03f071..aafe59d0011d 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/LoggerPass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/LoggerPass.php
@@ -37,18 +37,7 @@ public function process(ContainerBuilder $container)
             return;
         }
 
-        if ($debug = $container->getParameter('kernel.debug')) {
-            // Build an expression that will be equivalent to `!in_array(PHP_SAPI, ['cli', 'phpdbg'])`
-            $debug = (new Definition('bool'))
-                ->setFactory('in_array')
-                ->setArguments([
-                    (new Definition('string'))->setFactory('constant')->setArguments(['PHP_SAPI']),
-                    ['cli', 'phpdbg'],
-                ]);
-            $debug = (new Definition('bool'))
-                ->setFactory('in_array')
-                ->setArguments([$debug, [false]]);
-        }
+        $debug = $container->getParameter('kernel.debug') && $container->getParameter('kernel.runtime_mode.web');
 
         $container->register('logger', Logger::class)
             ->setArguments([null, null, null, new Reference(RequestStack::class), $debug]);
diff --git a/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php b/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
index 399a69431e1e..4b0d1491811f 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
@@ -32,19 +32,21 @@ class DebugHandlersListener implements EventSubscriberInterface
 {
     private string|object|null $earlyHandler;
     private ?\Closure $exceptionHandler;
+    private bool $webMode;
     private bool $firstCall = true;
     private bool $hasTerminatedWithException = false;
 
     /**
      * @param callable|null $exceptionHandler A handler that must support \Throwable instances that will be called on Exception
      */
-    public function __construct(callable $exceptionHandler = null)
+    public function __construct(callable $exceptionHandler = null, bool $webMode = null)
     {
         $handler = set_exception_handler('is_int');
         $this->earlyHandler = \is_array($handler) ? $handler[0] : null;
         restore_exception_handler();
 
         $this->exceptionHandler = null === $exceptionHandler ? null : $exceptionHandler(...);
+        $this->webMode = $webMode ?? !\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true);
     }
 
     /**
@@ -52,7 +54,7 @@ public function __construct(callable $exceptionHandler = null)
      */
     public function configure(object $event = null): void
     {
-        if ($event instanceof ConsoleEvent && !\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+        if ($event instanceof ConsoleEvent && $this->webMode) {
             return;
         }
         if (!$event instanceof KernelEvent ? !$this->firstCall : !$event->isMainRequest()) {
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index e55cfdf3dca2..ee5cf2756e9e 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -570,6 +570,10 @@ protected function getKernelParameters(): array
             'kernel.project_dir' => realpath($this->getProjectDir()) ?: $this->getProjectDir(),
             'kernel.environment' => $this->environment,
             'kernel.runtime_environment' => '%env(default:kernel.environment:APP_RUNTIME_ENV)%',
+            'kernel.runtime_mode' => '%env(query_string:default:container.runtime_mode:APP_RUNTIME_MODE)%',
+            'kernel.runtime_mode.web' => '%env(bool:default::key:web:default:kernel.runtime_mode:)%',
+            'kernel.runtime_mode.cli' => '%env(not:default:kernel.runtime_mode.web:)%',
+            'kernel.runtime_mode.worker' => '%env(bool:default::key:worker:default:kernel.runtime_mode:)%',
             'kernel.debug' => $this->debug,
             'kernel.build_dir' => realpath($buildDir = $this->warmupDir ?: $this->getBuildDir()) ?: $buildDir,
             'kernel.cache_dir' => realpath($cacheDir = ($this->getCacheDir() === $this->getBuildDir() ? ($this->warmupDir ?: $this->getCacheDir()) : $this->getCacheDir())) ?: $cacheDir,
diff --git a/src/Symfony/Component/HttpKernel/Log/DebugLoggerConfigurator.php b/src/Symfony/Component/HttpKernel/Log/DebugLoggerConfigurator.php
index b3e408af84a0..a6e61f622bf4 100644
--- a/src/Symfony/Component/HttpKernel/Log/DebugLoggerConfigurator.php
+++ b/src/Symfony/Component/HttpKernel/Log/DebugLoggerConfigurator.php
@@ -22,7 +22,7 @@ class DebugLoggerConfigurator
 
     public function __construct(DebugLoggerInterface $processor, bool $enable = null)
     {
-        if ($enable ?? !\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+        if ($enable ?? !\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
             $this->processor = $processor;
         }
     }
diff --git a/src/Symfony/Component/Routing/Router.php b/src/Symfony/Component/Routing/Router.php
index 045a035a2f04..be3db21cc7de 100644
--- a/src/Symfony/Component/Routing/Router.php
+++ b/src/Symfony/Component/Routing/Router.php
@@ -343,7 +343,7 @@ private function getConfigCacheFactory(): ConfigCacheFactoryInterface
 
     private static function getCompiledRoutes(string $path): array
     {
-        if ([] === self::$cache && \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOL))) {
+        if ([] === self::$cache && \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOL))) {
             self::$cache = null;
         }
 
diff --git a/src/Symfony/Component/Runtime/Internal/BasicErrorHandler.php b/src/Symfony/Component/Runtime/Internal/BasicErrorHandler.php
index 63e11973b5a6..3567c99eace1 100644
--- a/src/Symfony/Component/Runtime/Internal/BasicErrorHandler.php
+++ b/src/Symfony/Component/Runtime/Internal/BasicErrorHandler.php
@@ -22,7 +22,7 @@ public static function register(bool $debug): void
     {
         error_reporting(-1);
 
-        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
             ini_set('display_errors', $debug);
         } elseif (!filter_var(\ini_get('log_errors'), \FILTER_VALIDATE_BOOL) || \ini_get('error_log')) {
             // CLI - display errors only if they're not already logged to STDERR
diff --git a/src/Symfony/Component/Runtime/Runner/Symfony/HttpKernelRunner.php b/src/Symfony/Component/Runtime/Runner/Symfony/HttpKernelRunner.php
index a5176a9ca309..13c9037ca853 100644
--- a/src/Symfony/Component/Runtime/Runner/Symfony/HttpKernelRunner.php
+++ b/src/Symfony/Component/Runtime/Runner/Symfony/HttpKernelRunner.php
@@ -12,7 +12,9 @@
 namespace Symfony\Component\Runtime\Runner\Symfony;
 
 use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
+use Symfony\Component\HttpKernel\Kernel;
 use Symfony\Component\HttpKernel\TerminableInterface;
 use Symfony\Component\Runtime\RunnerInterface;
 
@@ -31,7 +33,21 @@ public function __construct(
     public function run(): int
     {
         $response = $this->kernel->handle($this->request);
-        $response->send(!$this->debug);
+
+        if (Kernel::VERSION_ID >= 60400) {
+            $response->send(false);
+
+            if (\function_exists('fastcgi_finish_request') && !$this->debug) {
+                fastcgi_finish_request();
+            } elseif (\function_exists('litespeed_finish_request') && !$this->debug) {
+                litespeed_finish_request();
+            } else {
+                Response::closeOutputBuffers(0, true);
+                flush();
+            }
+        } else {
+            $response->send();
+        }
 
         if ($this->kernel instanceof TerminableInterface) {
             $this->kernel->terminate($this->request, $response);
diff --git a/src/Symfony/Component/Translation/Loader/PhpFileLoader.php b/src/Symfony/Component/Translation/Loader/PhpFileLoader.php
index 93f23cd95fe4..541b6c8322bb 100644
--- a/src/Symfony/Component/Translation/Loader/PhpFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/PhpFileLoader.php
@@ -22,7 +22,7 @@ class PhpFileLoader extends FileLoader
 
     protected function loadResource(string $resource): array
     {
-        if ([] === self::$cache && \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOL))) {
+        if ([] === self::$cache && \function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) || filter_var(\ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOL))) {
             self::$cache = null;
         }
 
diff --git a/src/Symfony/Component/VarDumper/Resources/functions/dump.php b/src/Symfony/Component/VarDumper/Resources/functions/dump.php
index a0e5addff109..f2ff74c0caee 100644
--- a/src/Symfony/Component/VarDumper/Resources/functions/dump.php
+++ b/src/Symfony/Component/VarDumper/Resources/functions/dump.php
@@ -45,7 +45,7 @@ function dump(mixed ...$vars): mixed
 if (!function_exists('dd')) {
     function dd(mixed ...$vars): never
     {
-        if (!in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && !headers_sent()) {
+        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) && !headers_sent()) {
             header('HTTP/1.1 500 Internal Server Error');
         }
 
diff --git a/src/Symfony/Component/VarDumper/VarDumper.php b/src/Symfony/Component/VarDumper/VarDumper.php
index cfc6b2807b4d..baff2115b489 100644
--- a/src/Symfony/Component/VarDumper/VarDumper.php
+++ b/src/Symfony/Component/VarDumper/VarDumper.php
@@ -85,11 +85,11 @@ private static function register(): void
             case 'server' === $format:
             case $format && 'tcp' === parse_url($format, \PHP_URL_SCHEME):
                 $host = 'server' === $format ? $_SERVER['VAR_DUMPER_SERVER'] ?? '127.0.0.1:9912' : $format;
-                $dumper = \in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) ? new CliDumper() : new HtmlDumper();
+                $dumper = \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? new CliDumper() : new HtmlDumper();
                 $dumper = new ServerDumper($host, $dumper, self::getDefaultContextProviders());
                 break;
             default:
-                $dumper = \in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) ? new CliDumper() : new HtmlDumper();
+                $dumper = \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? new CliDumper() : new HtmlDumper();
         }
 
         if (!$dumper instanceof ServerDumper) {
@@ -111,7 +111,7 @@ private static function getDefaultContextProviders(): array
     {
         $contextProviders = [];
 
-        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && class_exists(Request::class)) {
+        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) && class_exists(Request::class)) {
             $requestStack = new RequestStack();
             $requestStack->push(Request::createFromGlobals());
             $contextProviders['request'] = new RequestContextProvider($requestStack);