Changed some line in SapiEmitter | removed SapiStreamEmitter for now

composer.json

@@ -37,7 +37,7 @@
         "exclude-from-classmap"                 : ["tests/"]
     },
     "autoload-dev": {
-        "files"                                 : ["tests/sapiEmitterFunctions.php"],
+        "files"                                 : ["tests/OverwritePhpFunctions.php"],
         "psr-4": {
             "Narrowspark\\HttpEmitter\\Tests\\" : "tests/"
         }

src/SapiEmitter.php

@@ -29,27 +29,33 @@ public function setMaxBufferLevel(int $maxBufferLevel)
      */
     public function emit(ResponseInterface $response)
     {
-        if (headers_sent()) {
-            throw new RuntimeException('Unable to emit response: headers already sent.');
+        $file = $line = null;
+
+        if (headers_sent($file, $line)) {
+            throw new RuntimeException(sprintf(
+                'Unable to emit response: Headers already sent in file %s on line %s.',
+                $file,
+                $line
+            ));
         }
 
         $response = $this->injectContentLength($response);
 
-        // Emit the HTTP status line
         $this->emitStatusLine($response);
-        // Emit the HTTP headers
         $this->emitHeaders($response);
-        // Emit the body
-        $this->sendBody($response);
 
-        if (function_exists('fastcgi_finish_request')) {
-            fastcgi_finish_request();
-        } elseif (php_sapi_name() == 'cli' || php_sapi_name() == 'phpdbg') {
-            // Command line output buffering is disabled in cli by default.
+        // Command line output buffering is disabled in cli by default.
+        if (php_sapi_name() == 'cli' || php_sapi_name() == 'phpdbg') {
             $this->collectGarbage();
 
             Util::closeOutputBuffers($this->maxBufferLevel ?? ob_get_level(), true);
         }
+
+        $this->sendBody($response);
+
+        if (function_exists('fastcgi_finish_request')) {
+            fastcgi_finish_request();
+        }
     }
 
     /**