PHP GRPC Client

OpenSwoole GRPC client can be used to connect with GRPC services provided by either OpenSwoole GRPC servers or GRPC services implemented with other frameworks and programming languages.

You have to install OpenSwoole GRPC library with composer require openswoole/grpc to use this hook.

Methods

• OpenSwoole\GRPC\Client->__construct
• OpenSwoole\GRPC\Client->set
• OpenSwoole\GRPC\Client->connect
• OpenSwoole\GRPC\Client->stats
• OpenSwoole\GRPC\Client->close
• OpenSwoole\GRPC\Client->send
• OpenSwoole\GRPC\Client->recv
• OpenSwoole\GRPC\Client->push

PHP GRPC Client Example

Generate PHP stub codes with OpenSwoole GRPC Compiler

Then you can generate PHP stub codes from the .proto and OpenSwoole GRPC Compiler.

Then implement the logic of the client in the generated PHP service files like the following Helloworld GreeterClient example:

<?php
declare(strict_types=1);
// src/Helloworld/GreeterClient.php

namespace Helloworld;

class GreeterClient extends \OpenSwoole\GRPC\BaseStub
{
    /**
     * @param mixed $metadata
     *
     * @throws \OpenSwooleGRPC\Exception\InvokeException
     */
    public function SayHello(HelloRequest $request, $metadata = []): HelloReply
    {
        return $this->_simpleRequest('/helloworld.Greeter/SayHello',
            $request,
            ['\Helloworld\HelloReply', 'decode'],
            $metadata);
    }
}

GRPC Client side example:

<?php
declare(strict_types=1);

use Helloworld\HelloRequest;
use OpenSwoole\Constant;
use OpenSwoole\GRPC\Client;

co::set(['log_level' => Constant::LOG_ERROR]);

co::run(function () {
    $conn    = (new Client('127.0.0.1', 9501))->connect();
    $client  = new Helloworld\GreeterClient($conn);
    $message = new HelloRequest();
    $message->setName(str_repeat('x', 10));
    $out = $client->sayHello($message);
    var_dump($out->serializeToJsonString());
    $conn->close();
    echo "closed\n";
});