google/grpc-gcp v0.3.0

The google/grpc-gcp package is a unique Google Cloud Platform (GCP) specific extension for gRPC. gRPC is a high-performance, open-source RPC framework developed by Google. This package essentially enhances the abilities of the gRPC in a GCP environment. With its efficient channel management capabilities, it aids in optimizing the use of gRPC channels, thereby leading to a reduction in resources and improved performance.

To utilize the google/grpc-gcp package, you would need to first install it using the Composer dependency management tool. Add the following line in your composer.json file under the require section:

{
    "require": {
        "google/grpc-gcp": "^0.1.4"
    }
}

Then, run the composer update command.

After this, you can incorporate the google/grpc-gcp package in your PHP application as follows:

<?php

require 'vendor/autoload.php';

use Google\Cloud\Spanner\V1\SpannerClient;
use Google\Cloud\Spanner\V1\Gapic\SpannerGapicClient;
use Google\Cloud\Spanner\V1\Session;

function simpleApiCall()
{
    $spannerClient = new SpannerClient();
    $session = (new Session())->setName('projects/my_project/instances/my_instance/databases/my_database/sessions/my_session');
    $tx = $spannerClient->beginTransaction($session);
    $query = 'SELECT * FROM my_table';
    $resultSet = $spannerClient->executeSql($tx, $query);
    foreach ($resultSet as $row) {
        echo $row;
    }
}

// make the API call
simpleApiCall();

Please replace 'my_project', 'my_instance', 'my_database', 'my_session', and 'my_table' with the applicable values for your GCP project and Spanner database.

To find the detailed documentation for the google/grpc-gcp package, refer to the src directory in the package's GitHub repository. This would contain documents and code snippets providing an in-depth understanding of the package and its usage. Note that since this is a comparatively specialized package, the examples and documentation may not be as complete as with more widely-used packages. For a broader understanding of gRPC as a whole, the main gRPC project may be a useful reference point.