fixes potential dialogflow fatal error (GoogleCloudPlatform#806)

Author: bshaffer

dialogflow/src/detect_intent_stream.php

@@ -71,7 +71,7 @@ function detect_intent_stream($projectId, $path, $sessionId, $languageCode = 'en
         $request->setInputAudio($chunk);
         $requests[] = $request;
     }
-    
+
     // intermediate transcript info
     print(PHP_EOL . str_repeat("=", 20) . PHP_EOL);
     $stream = $sessionsClient->streamingDetectIntent();
@@ -85,22 +85,24 @@ function detect_intent_stream($projectId, $path, $sessionId, $languageCode = 'en
             printf('Intermediate transcript: %s' . PHP_EOL, $transcript);
         }
     }
-    print(str_repeat("=", 20) . PHP_EOL);
 
     // get final response and relevant info
-    $queryResult = $response->getQueryResult();
-    $queryText = $queryResult->getQueryText();
-    $intent = $queryResult->getIntent();
-    $displayName = $intent->getDisplayName();
-    $confidence = $queryResult->getIntentDetectionConfidence();
-    $fulfilmentText = $queryResult->getFulfillmentText();
+    if ($response) {
+        print(str_repeat("=", 20) . PHP_EOL);
+        $queryResult = $response->getQueryResult();
+        $queryText = $queryResult->getQueryText();
+        $intent = $queryResult->getIntent();
+        $displayName = $intent->getDisplayName();
+        $confidence = $queryResult->getIntentDetectionConfidence();
+        $fulfilmentText = $queryResult->getFulfillmentText();
 
-    // output relevant info
-    printf('Query text: %s' . PHP_EOL, $queryText);
-    printf('Detected intent: %s (confidence: %f)' . PHP_EOL, $displayName,
-        $confidence);
-    print(PHP_EOL);
-    printf('Fulfilment text: %s' . PHP_EOL, $fulfilmentText);
+        // output relevant info
+        printf('Query text: %s' . PHP_EOL, $queryText);
+        printf('Detected intent: %s (confidence: %f)' . PHP_EOL, $displayName,
+            $confidence);
+        print(PHP_EOL);
+        printf('Fulfilment text: %s' . PHP_EOL, $fulfilmentText);
+    }
 
     $sessionsClient->close();
 }

dialogflow/test/contextTest.php

@@ -29,7 +29,7 @@ class contextTest extends \PHPUnit_Framework_TestCase
 
     public static function setUpBeforeClass()
     {
-        self::$contextId = 'fake_context' . time();
+        self::$contextId = sprintf('fake_context_%s_%s', rand(100, 999), time());
     }
 
     public function testCreateContext()

dialogflow/test/entityTypeTest.php

@@ -28,7 +28,7 @@ class entityTypeTest extends \PHPUnit_Framework_TestCase
 
     public function setUp()
     {
-        self::$entityTypeDisplayName = 'fake_display' . time();
+        self::$entityTypeDisplayName = sprintf('fake_display_%s_%s', rand(100, 999), time());
     }
 
     public function testCreateEntityType()

dialogflow/test/intentTest.php

@@ -30,7 +30,7 @@ class intentTest extends \PHPUnit_Framework_TestCase
 
     public static function setUpBeforeClass()
     {
-        self::$displayName = 'fake_display' . time();
+        self::$displayName = sprintf('fake_display_%s_%s', rand(100, 999), time());
     }
 
     public function testCreateIntent()

dialogflow/test/sessionEntityTypeTest.php

@@ -30,7 +30,7 @@ class sessionEntityTypeTest extends \PHPUnit_Framework_TestCase
 
     public static function setUpBeforeClass()
     {
-        self::$entityTypeDisplayName = 'fake_display' . time();
+        self::$entityTypeDisplayName = sprintf('fake_display_%s_%s', rand(100, 999), time());
     }
 
     public function testCreateSessionEntityType()