Querying a Global Secondary Index using the AWS SDK for PHP

Now, we are going to see how to query a global secondary index using the AWS SDK for PHP.

Getting ready

To perform this operation, you can use the IDE of your choice. To perform a query operation, you should first add items using the AWS Console or SDK, as we have seen in the earlier chapters.

How to do it…

The Query API on a Global Secondary Index is similar to the query API on a DynamoDB table. Perform the following operations in order to query the index:

1. Instantiate the DynamoDB client for PHP. Specify the AWS region in which you wish to create the table:

   $client = DynamoDbClient::factory(array(
       'profile' => 'default',
       'region' => 'us-west-1'  
   ));

2. Invoke the query method from the DynamoDB client by specifying the secondary index keys on which you wish to perform the query. Here, we want to fetch all the products whose name is S3:

   $tableName = 'product';
   
   $response = $client->query(array(
       'TableName' => $tableName...