[DI] fix preloading script generation

symfony · Mar 17, 2020 · fda0ec7 · fda0ec7
1 parent dad60d9
commit fda0ec7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/EventListener/AddLinkHeaderListener.php b/EventListener/AddLinkHeaderListener.php
@@ -17,6 +17,9 @@
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\WebLink\HttpHeaderSerializer;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(HttpHeaderSerializer::class);
+
 /**
  * Adds the Link HTTP header to the response.
  *