Don't attempt to blindly flush buffer.

This may destroy output buffering e.g. in Horde_View. Only flush buffers if we are sure that content has been sent to the browser already.
horde · Mar 4, 2016 · fe7e6b7 · fe7e6b7
1 parent e234847
commit fe7e6b7
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/framework/Core/lib/Horde/PageOutput.php b/framework/Core/lib/Horde/PageOutput.php
@@ -726,8 +726,10 @@ public function header(array $opts = array())
         // Send what we have currently output so the browser can start
         // loading CSS/JS. See:
         // http://developer.yahoo.com/performance/rules.html#flush
-        echo Horde::endBuffer();
-        flush();
+        if (Horde::contentSent()) {
+            echo Horde::endBuffer();
+            flush();
+        }
     }
 
     /**