Fixed PHP interop tests
diff --git a/src/php/lib/Grpc/ActiveCall.php b/src/php/lib/Grpc/ActiveCall.php
index 836a4b0..e0ea43a 100755
--- a/src/php/lib/Grpc/ActiveCall.php
+++ b/src/php/lib/Grpc/ActiveCall.php
@@ -28,9 +28,9 @@
$this->flags = $flags;
// Invoke the call.
- $this->call->start_invoke($this->completion_queue,
- CLIENT_METADATA_READ,
- FINISHED, 0);
+ $this->call->invoke($this->completion_queue,
+ CLIENT_METADATA_READ,
+ FINISHED, 0);
$metadata_event = $this->completion_queue->pluck(CLIENT_METADATA_READ,
Timeval::inf_future());
$this->metadata = $metadata_event->data;