DynamoDB. AWS SDK for PHP.

Download and install DynamoDB from official site. For older versions connect with code below:

$client = \Aws\DynamoDb\DynamoDbClient::factory(array(
    'region' => 'us-west-2',
    'base_url' => 'http://localhost:8000',
    'key' => 'x',
    'secret' => 'y',
));

For 3.3.1 version:

$client = \Aws\DynamoDb\DynamoDbClient::factory(array(
    'region' => 'us-west-2',
    'endpoint' => 'http://localhost:8000',
    'credentials' => [
        'key' => 'x',
        'secret' => 'y',
    ],
    'version' => 'latest'
));

Search in nested arrays:

$client->putItem([
    'TableName' => $this->model,
    'Item' => [
        'Id' => ['S' => uniqid()],
        'Attrs' => [
            'M' => [
                'ComponentName' => ['S' => 'Beer'],
                'CAS' => [ 'S' => '3432-2-123']
            ]
        ]
    ]
]);


// search by nested key

$iterator = $client->getIterator('Scan', [
    'TableName' => $this->model,
    'FilterExpression' => 'Attrs.ComponentName = :name',
    "ExpressionAttributeValues" => [
        ":name" => ["S" => "Beer"]
    ],
]);