Handle case when wikipedia_url or mid does not exist

Author: gogasca

language/src/analyze_entities.php

@@ -25,7 +25,6 @@
 namespace Google\Cloud\Samples\Language;
 
 use Google\Cloud\Language\V1beta2\Document;
-use Google\Cloud\Language\V1beta2\Entity;
 use Google\Cloud\Language\V1beta2\LanguageServiceClient;
 /**
  * Find the entities in text.
@@ -63,8 +62,12 @@ function analyze_entities($text, $projectId = null)
             printf('Name: %s' . PHP_EOL, $entity->getName());
             printf('Type: %s' . PHP_EOL, $entity_types[$entity->getType()]);
             printf('Salience: %s' . PHP_EOL, $entity->getSalience());
-            printf('Wikipedia URL: %s' . PHP_EOL, $entity->getMetadata()->offsetGet('wikipedia_url'));
-            printf('Knowledge Graph MID: %s' . PHP_EOL, $entity->getMetadata()->offsetGet('mid'));
+            if($entity->getMetadata()->offsetExists('wikipedia_url')) {
+                printf('Wikipedia URL: %s' . PHP_EOL, $entity->getMetadata()->offsetGet('wikipedia_url'));
+            }
+            if($entity->getMetadata()->offsetExists('mid')) {
+                printf('Knowledge Graph MID: %s' . PHP_EOL, $mid = $entity->getMetadata()->offsetGet('mid'));
+            }
             printf(PHP_EOL);
         }
 

language/src/analyze_entities_from_file.php

@@ -63,8 +63,12 @@ function analyze_entities_from_file($gcsUri, $projectId = null)
             printf('Name: %s' . PHP_EOL, $entity->getName());
             printf('Type: %s' . PHP_EOL, $entity_types[$entity->getType()]);
             printf('Salience: %s' . PHP_EOL, $entity->getSalience());
-            printf('Wikipedia URL: %s' . PHP_EOL, $entity->getMetadata()->offsetGet('wikipedia_url'));
-            printf('Knowledge Graph MID: %s' . PHP_EOL, $entity->getMetadata()->offsetGet('mid'));
+            if($entity->getMetadata()->offsetExists('wikipedia_url')) {
+                printf('Wikipedia URL: %s' . PHP_EOL, $entity->getMetadata()->offsetGet('wikipedia_url'));
+            }
+            if($entity->getMetadata()->offsetExists('mid')) {
+                printf('Knowledge Graph MID: %s' . PHP_EOL, $mid = $entity->getMetadata()->offsetGet('mid'));
+            }
             printf(PHP_EOL);
         }