create grpc client server in php

To create a gRPC client and server in PHP, you will need to follow these steps:

Install gRPC PHP extension:


pecl install grpc
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Install protobuf PHP extension:


pecl install protobuf
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Create a .proto file that contains the service definition. For example, let's create a file example.proto with the following content:


syntax = "proto3";
 
service ExampleService {
  rpc SayHello (HelloRequest) returns (HelloReply) {}
}
 
message HelloRequest {
  string name = 1;
}
 
message HelloReply {
  string message = 1;
}
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Generate the gRPC code from the .proto file. To do this, you need to use the protoc compiler and the grpc_php_plugin. For example:


protoc --php_out=./ --grpc_out=./ --plugin=protoc-gen-grpc=/path/to/grpc_php_plugin example.proto
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This will generate two files: example.pb.php and example.grpc.php.
Create a gRPC server. Here is an example server that implements the ExampleService:


main.php
<?php
require 'vendor/autoload.php';
require 'example.grpc.php';
 
class ExampleServiceHandler implements example\ExampleServiceServer {
 
    public function SayHello(example\HelloRequest $request): example\HelloReply {
        return new example\HelloReply(['message' => 'Hello, ' . $request->getName() . '!']);
    }
}
 
$server = new \Grpc\Server();
$server->addHttp2Port('0.0.0.0:50051');
$server->handle(new ExampleServiceHandler());
$server->run();
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Create a gRPC client to connect to the server. Here is an example client that sends a SayHello request:


main.php
<?php
require 'vendor/autoload.php';
require 'example.grpc.php';
 
$client = new example\ExampleServiceClient('localhost:50051', [
   'credentials' => \Grpc\ChannelCredentials::createInsecure(),
]);
 
$request = new example\HelloRequest(['name' => 'World']);
$response = $client->SayHello($request)->wait();
list($reply, $status) = $response;
echo $reply->getMessage() . "\n";
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You can find more information and examples in the official gRPC PHP documentation.

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