Add new "dumpdie" function that uses an exception to write to the PSR response and thus still works with RoadRunner.

composer.json

@@ -161,7 +161,10 @@
   "autoload": {
     "psr-4": {
       "App\\": "src"
-    }
+    },
+    "files": [
+      "./config/functions.php"
+    ]
   },
   "minimum-stability": "dev",
   "prefer-stable": true,

config/functions.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+function env(): App\Environment
+{
+    return App\Environment::getInstance();
+}
+
+function logger(): Monolog\Logger
+{
+    return App\Utilities\Logger::getInstance();
+}
+
+/**
+ * @throws App\Exception\DumpException
+ */
+function dumpdie(mixed ...$vars): never
+{
+    if (env()->isCli()) {
+        $dumper = new Symfony\Component\VarDumper\Dumper\CliDumper();
+        $varCloner = new Symfony\Component\VarDumper\Cloner\VarCloner();
+
+        foreach ($vars as $var) {
+            $dumper->dump($varCloner->cloneVar($var), true);
+        }
+        exit(1);
+    }
+
+    $dumper = new Symfony\Component\VarDumper\Dumper\HtmlDumper();
+    $varCloner = new Symfony\Component\VarDumper\Cloner\VarCloner();
+
+    $dumps = [];
+    foreach ($vars as $var) {
+        $dumps[] = $dumper->dump($varCloner->cloneVar($var), true);
+    }
+
+    throw new App\Exception\DumpException(dumps: $dumps);
+}

src/Exception/DumpException.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exception;
+
+use App\Exception;
+use Monolog\Level;
+use Throwable;
+
+final class DumpException extends Exception
+{
+    public function __construct(
+        string $message = 'Debug app dump.',
+        int $code = 200,
+        Throwable $previous = null,
+        Level $loggerLevel = Level::Debug,
+        private readonly array $dumps = []
+    ) {
+        parent::__construct($message, $code, $previous, $loggerLevel);
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getDumps(): array
+    {
+        return $this->dumps;
+    }
+}

src/Http/ErrorHandler.php

@@ -116,6 +116,19 @@ final class ErrorHandler extends SlimErrorHandler
             $locale->register($this->environment);
         }
 
+        if ($this->exception instanceof Exception\DumpException) {
+            $response = $this->responseFactory->createResponse($this->statusCode);
+            $responseBody = $response->getBody();
+            foreach ($this->exception->getDumps() as $dump) {
+                $responseBody->write($dump);
+            }
+            return $response;
+        }
+
+        if (!($this->request instanceof ServerRequest)) {
+            return parent::respond();
+        }
+
         // Special handling for cURL requests.
         $ua = $this->request->getHeaderLine('User-Agent');
 
@@ -134,10 +147,6 @@ final class ErrorHandler extends SlimErrorHandler
             return $response;
         }
 
-        if (!($this->request instanceof ServerRequest)) {
-            return parent::respond();
-        }
-
         if ($this->exception instanceof HttpException) {
             /** @var Response $response */
             $response = $this->responseFactory->createResponse($this->exception->getCode());