fix header within termination

1 files changed, 3 insertions, 0 deletions

diff --git a/php-src/Worker.php b/php-src/Worker.php
index 5835baf2..3e013090 100644
--- a/php-src/Worker.php
+++ b/php-src/Worker.php
@@ -56,6 +56,9 @@ class Worker
                 return $this->receive($header);
             }
 
+            // no context for the termination.
+            $header = null;
+
             // Expect process termination
             return null;
         }