# Google Developers Knowledge V1 Client - Class DeveloperKnowledgeClient (0.1.0)

Reference documentation and code samples for the Google Developers Knowledge V1 Client class DeveloperKnowledgeClient.

Service Description: The Developer Knowledge API provides programmatic access to Google's public
developer documentation, enabling you to integrate this knowledge base into
your own applications and workflows.

The API is designed to be the canonical source for machine-readable access to
Google's developer documentation.

A typical use case is to first use
[DeveloperKnowledge.SearchDocumentChunks](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__searchDocumentChunks__)
to find relevant page URIs based on a query, and then use
[DeveloperKnowledge.GetDocument](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__getDocument__)
or
[DeveloperKnowledge.BatchGetDocuments](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__batchGetDocuments__)
to fetch the full content of the top results.

All document content is provided in Markdown format.

This class provides the ability to make remote calls to the backing service through method
calls that map to API methods.

Many parameters require resource names to be formatted in a particular way. To
assist with these names, this class includes a format method for each type of
name, and additionally a parseName method to extract the individual identifiers
contained within formatted names that are returned by the API.

## Namespace

Google \\ Developers \\ Knowledge \\ V1 \\ Client

## Methods

### __construct

Constructor.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `options` | `array|https://docs.cloud.google.com/php/docs/reference/gax/latest/Options.ClientOptions.html` Optional. Options for configuring the service API wrapper. |
| `↳ apiEndpoint` | `string` The address of the API remote host. May optionally include the port, formatted as " |
| `↳ credentials` | `https://docs.cloud.google.com/php/docs/reference/auth/latest/FetchAuthTokenInterface.html|https://docs.cloud.google.com/php/docs/reference/gax/latest/CredentialsWrapper.html` This option should only be used with a pre-constructed [Google\\Auth\\FetchAuthTokenInterface](https://docs.cloud.google.com/php/docs/reference/auth/latest/FetchAuthTokenInterface.html) or [Google\\ApiCore\\CredentialsWrapper](https://docs.cloud.google.com/php/docs/reference/gax/latest/CredentialsWrapper.html) object. Note that when one of these objects are provided, any settings in $credentialsConfig will be ignored. **Important** : If you are providing a path to a credentials file, or a decoded credentials file as a PHP array, this usage is now DEPRECATED. Providing an unvalidated credential configuration to Google APIs can compromise the security of your systems and data. It is recommended to create the credentials explicitly `use Google\Auth\Credentials\ServiceAccountCredentials; use Google\Developers\Knowledge\V1\DeveloperKnowledgeClient; $creds = new ServiceAccountCredentials($scopes, $json); $options = new DeveloperKnowledgeClient(['credentials' => $creds]);` <https://cloud.google.com/docs/authentication/external/externally-sourced-credentials> |
| `↳ credentialsConfig` | `array` Options used to configure credentials, including auth token caching, for the client. For a full list of supporting configuration options, see [Google\\ApiCore\\CredentialsWrapper::build()](https://docs.cloud.google.com/php/docs/reference/gax/latest/CredentialsWrapper.html#_Google_ApiCore_CredentialsWrapper__build__) . |
| `↳ disableRetries` | `bool` Determines whether or not retries defined by the client configuration should be disabled. Defaults to `false`. |
| `↳ clientConfig` | `string|array` Client method configuration, including retry settings. This option can be either a path to a JSON file, or a PHP array containing the decoded JSON data. By default this settings points to the default client config file, which is provided in the resources folder. |
| `↳ transport` | `string|https://docs.cloud.google.com/php/docs/reference/gax/latest/Transport.TransportInterface.html` The transport used for executing network requests. May be either the string `rest` or `grpc`. Defaults to `grpc` if gRPC support is detected on the system. *Advanced usage* : Additionally, it is possible to pass in an already instantiated [Google\\ApiCore\\Transport\\TransportInterface](https://docs.cloud.google.com/php/docs/reference/gax/latest/Transport.TransportInterface.html) object. Note that when this object is provided, any settings in $transportConfig, and any $apiEndpoint setting, will be ignored. |
| `↳ transportConfig` | `array` Configuration options that will be used to construct the transport. Options for each supported transport type should be passed in a key for that transport. For example: $transportConfig = \[ 'grpc' =\> \[...\], 'rest' =\> \[...\], \]; See the [Google\\ApiCore\\Transport\\GrpcTransport::build()](https://docs.cloud.google.com/php/docs/reference/gax/latest/Transport.GrpcTransport.html#_Google_ApiCore_Transport_GrpcTransport__build__) and [Google\\ApiCore\\Transport\\RestTransport::build()](https://docs.cloud.google.com/php/docs/reference/gax/latest/Transport.RestTransport.html#_Google_ApiCore_Transport_RestTransport__build__) methods for the supported options. |
| `↳ clientCertSource` | `callable` A callable which returns the client cert as a string. This can be used to provide a certificate and private key to the transport layer for mTLS. |
| `↳ logger` | `false|Psr\Log\LoggerInterface` A PSR-3 compliant logger. If set to false, logging is disabled, ignoring the 'GOOGLE_SDK_PHP_LOGGING' environment flag |
| `↳ universeDomain` | `string` The service domain for the client. Defaults to 'googleapis.com'. |

### batchGetDocuments

Retrieves multiple documents, each with its full Markdown content.

The async variant is [DeveloperKnowledgeClient::batchGetDocumentsAsync()](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__batchGetDocumentsAsync__) .

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.BatchGetDocumentsRequest` A request to house fields associated with the call. |
| `callOptions` | `array` Optional. |
| `↳ retrySettings` | `https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html|array` Retry settings to use for this call. Can be a [Google\\ApiCore\\RetrySettings](https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html) object, or an associative array of retry settings parameters. See the documentation on [Google\\ApiCore\\RetrySettings](https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html) for example usage. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.BatchGetDocumentsResponse` |   |

**Example**

    use Google\ApiCore\ApiException;
    use Google\Developers\Knowledge\V1\BatchGetDocumentsRequest;
    use Google\Developers\Knowledge\V1\BatchGetDocumentsResponse;
    use Google\Developers\Knowledge\V1\Client\DeveloperKnowledgeClient;

    /**
     * @param string $formattedNamesElement Specifies the names of the documents to retrieve. A maximum of 20
     *                                      documents can be retrieved in a batch. The documents are returned in the
     *                                      same order as the `names` in the request.
     *
     *                                      Format: `documents/{uri_without_scheme}`
     *                                      Example: `documents/docs.cloud.google.com/storage/docs/creating-buckets`
     *                                      Please see {@see DeveloperKnowledgeClient::documentName()} for help formatting this field.
     */
    function batch_get_documents_sample(string $formattedNamesElement): void
    {
        // Create a client.
        $developerKnowledgeClient = new DeveloperKnowledgeClient();

        // Prepare the request message.
        $formattedNames = [$formattedNamesElement,];
        $request = (new BatchGetDocumentsRequest())
            ->setNames($formattedNames);

        // Call the API and handle any network failures.
        try {
            /** @var BatchGetDocumentsResponse $response */
            $response = $developerKnowledgeClient->batchGetDocuments($request);
            printf('Response data: %s' . PHP_EOL, $response->serializeToJsonString());
        } catch (ApiException $ex) {
            printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
        }
    }

    /**
     * Helper to execute the sample.
     *
     * This sample has been automatically generated and should be regarded as a code
     * template only. It will require modifications to work:
     *  - It may require correct/in-range values for request initialization.
     *  - It may require specifying regional endpoints when creating the service client,
     *    please see the apiEndpoint client configuration option for more details.
     */
    function callSample(): void
    {
        $formattedNamesElement = DeveloperKnowledgeClient::documentName('[DOCUMENT]');

        batch_get_documents_sample($formattedNamesElement);
    }

### getDocument

Retrieves a single document with its full Markdown content.

The async variant is [DeveloperKnowledgeClient::getDocumentAsync()](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__getDocumentAsync__) .

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.GetDocumentRequest` A request to house fields associated with the call. |
| `callOptions` | `array` Optional. |
| `↳ retrySettings` | `https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html|array` Retry settings to use for this call. Can be a [Google\\ApiCore\\RetrySettings](https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html) object, or an associative array of retry settings parameters. See the documentation on [Google\\ApiCore\\RetrySettings](https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html) for example usage. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Document` |   |

**Example**

    use Google\ApiCore\ApiException;
    use Google\Developers\Knowledge\V1\Client\DeveloperKnowledgeClient;
    use Google\Developers\Knowledge\V1\Document;
    use Google\Developers\Knowledge\V1\GetDocumentRequest;

    /**
     * @param string $formattedName Specifies the name of the document to retrieve.
     *                              Format: `documents/{uri_without_scheme}`
     *                              Example: `documents/docs.cloud.google.com/storage/docs/creating-buckets`
     *                              Please see {@see DeveloperKnowledgeClient::documentName()} for help formatting this field.
     */
    function get_document_sample(string $formattedName): void
    {
        // Create a client.
        $developerKnowledgeClient = new DeveloperKnowledgeClient();

        // Prepare the request message.
        $request = (new GetDocumentRequest())
            ->setName($formattedName);

        // Call the API and handle any network failures.
        try {
            /** @var Document $response */
            $response = $developerKnowledgeClient->getDocument($request);
            printf('Response data: %s' . PHP_EOL, $response->serializeToJsonString());
        } catch (ApiException $ex) {
            printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
        }
    }

    /**
     * Helper to execute the sample.
     *
     * This sample has been automatically generated and should be regarded as a code
     * template only. It will require modifications to work:
     *  - It may require correct/in-range values for request initialization.
     *  - It may require specifying regional endpoints when creating the service client,
     *    please see the apiEndpoint client configuration option for more details.
     */
    function callSample(): void
    {
        $formattedName = DeveloperKnowledgeClient::documentName('[DOCUMENT]');

        get_document_sample($formattedName);
    }

### searchDocumentChunks

Searches for developer knowledge across Google's developer documentation.

Returns [DocumentChunk](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.DocumentChunk)s
based on the user's query. There may be many chunks from the same
[Document](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Document). To retrieve full
documents, use
[DeveloperKnowledge.GetDocument](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__getDocument__)
or
[DeveloperKnowledge.BatchGetDocuments](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__batchGetDocuments__)
with the
[DocumentChunk.parent](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.DocumentChunk#_Google_Developers_Knowledge_V1_DocumentChunk__getParent__)
returned in the
[SearchDocumentChunksResponse.results](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.SearchDocumentChunksResponse#_Google_Developers_Knowledge_V1_SearchDocumentChunksResponse__getResults__).

The async variant is
[DeveloperKnowledgeClient::searchDocumentChunksAsync()](https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Client.DeveloperKnowledgeClient#_Google_Developers_Knowledge_V1_Client_DeveloperKnowledgeClient__searchDocumentChunksAsync__) .

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.SearchDocumentChunksRequest` A request to house fields associated with the call. |
| `callOptions` | `array` Optional. |
| `↳ retrySettings` | `https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html|array` Retry settings to use for this call. Can be a [Google\\ApiCore\\RetrySettings](https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html) object, or an associative array of retry settings parameters. See the documentation on [Google\\ApiCore\\RetrySettings](https://docs.cloud.google.com/php/docs/reference/gax/latest/RetrySettings.html) for example usage. |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.cloud.google.com/php/docs/reference/gax/latest/PagedListResponse.html` |   |

**Example**

    use Google\ApiCore\ApiException;
    use Google\ApiCore\PagedListResponse;
    use Google\Developers\Knowledge\V1\Client\DeveloperKnowledgeClient;
    use Google\Developers\Knowledge\V1\DocumentChunk;
    use Google\Developers\Knowledge\V1\SearchDocumentChunksRequest;

    /**
     * @param string $query Provides the raw query string provided by the user, such as "How
     *                      to create a Cloud Storage bucket?".
     */
    function search_document_chunks_sample(string $query): void
    {
        // Create a client.
        $developerKnowledgeClient = new DeveloperKnowledgeClient();

        // Prepare the request message.
        $request = (new SearchDocumentChunksRequest())
            ->setQuery($query);

        // Call the API and handle any network failures.
        try {
            /** @var PagedListResponse $response */
            $response = $developerKnowledgeClient->searchDocumentChunks($request);

            /** @var DocumentChunk $element */
            foreach ($response as $element) {
                printf('Element data: %s' . PHP_EOL, $element->serializeToJsonString());
            }
        } catch (ApiException $ex) {
            printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
        }
    }

    /**
     * Helper to execute the sample.
     *
     * This sample has been automatically generated and should be regarded as a code
     * template only. It will require modifications to work:
     *  - It may require correct/in-range values for request initialization.
     *  - It may require specifying regional endpoints when creating the service client,
     *    please see the apiEndpoint client configuration option for more details.
     */
    function callSample(): void
    {
        $query = '[QUERY]';

        search_document_chunks_sample($query);
    }

### batchGetDocumentsAsync

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.BatchGetDocumentsRequest` |
| `optionalArgs` | `array` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-GuzzleHttp.Promise.Promise.html<https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.BatchGetDocumentsResponse>` |   |

### getDocumentAsync

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.GetDocumentRequest` |
| `optionalArgs` | `array` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-GuzzleHttp.Promise.Promise.html<https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.Document>` |   |

### searchDocumentChunksAsync

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `request` | `https://docs.cloud.google.com/php/docs/reference/developers-knowledge/latest/V1.SearchDocumentChunksRequest` |
| `optionalArgs` | `array` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-GuzzleHttp.Promise.Promise.html<https://docs.cloud.google.com/php/docs/reference/gax/latest/PagedListResponse.html>` |   |

### static::documentName

Formats a string containing the fully-qualified path to represent a document
resource.

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `document` | `string` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `string` | The formatted document resource. |

### static::parseName

Parses a formatted name string and returns an associative array of the components in the name.

The following name formats are supported:
Template: Pattern

- document: documents/{document}

The optional $template argument can be supplied to specify a particular pattern,
and must match one of the templates listed above. If no $template argument is
provided, or if the $template argument does not match one of the templates
listed, then parseName will check each of the supported templates, and return
the first match.

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `formattedName` | `string` The formatted name string |
| `template` | `?string` Optional name of template to match |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `array` | An associative array from name component IDs to component values. |