Grpc介绍|Grpc介绍 — Go-Service To PHP-Client Grpc介绍—Go-ServiceToPHP-Client

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笔者现在公司项目大部分是PHP进行开发，要完成整体微服务化必须要考虑PHP使用上的可行性，Grpc也是支持PHP作为client端发起Grpc请求，但是依赖的扩展等都相对复杂（毕竟不是亲儿子），那么本文就接受怎么使用PHP调用Grpc服务。
附上:
喵了个咪的博客：w-blog.cn
博文实例demo：GitHub - sunmi-OS/grpc-php-to-golang-demo
grpc官网：grpc / grpc.io
protobuf代码仓库：Releases · protocolbuffers/protobuf · GitHub
一，初始化PHP环境 PHP在使用过程中依赖一下几项内容

grpc.so
protobuf.so 或 composer依赖
grpc_php_plugin 用来生成文件

1、先编译grpc_php_plugin

> git clone https://github.com/grpc/grpc.git > cd grpc > git pull --recurse-submodules && git submodule update --init --recursive > make > sudo make install # make install 会在 /usr/local/bin 目录下生成以下文件 #grpc_cpp_plugin #grpc_csharp_plugin #grpc_node_plugin #grpc_objective_c_plugin #grpc_php_plugin #grpc_python_plugin #grpc_ruby_plugin# 或者只变编译grpc_php_plugin > make grpc_php_plugin Package libcares was not found in the pkg-config search path. Perhaps you should add the directory containing `libcares.pc' to the PKG_CONFIG_PATH environment variable No package 'libcares' found [C]Compiling third_party/address_sorting/address_sorting.c [C]Compiling third_party/address_sorting/address_sorting_posix.c [C]Compiling third_party/address_sorting/address_sorting_windows.c [AR]Creating /Users/wenzhenxi/Downloads/grpc/libs/opt/libaddress_sorting.a [HOSTCXX] Compiling src/compiler/cpp_generator.cc [HOSTCXX] Compiling src/compiler/csharp_generator.cc [HOSTCXX] Compiling src/compiler/node_generator.cc [HOSTCXX] Compiling src/compiler/objective_c_generator.cc [HOSTCXX] Compiling src/compiler/php_generator.cc [HOSTCXX] Compiling src/compiler/python_generator.cc [HOSTCXX] Compiling src/compiler/ruby_generator.cc [AR]Creating /Users/wenzhenxi/Downloads/grpc/libs/opt/libgrpc_plugin_support.a [HOSTCXX] Compiling src/compiler/php_plugin.cc Package libcares was not found in the pkg-config search path. Perhaps you should add the directory containing `libcares.pc' to the PKG_CONFIG_PATH environment variable No package 'libcares' found Package libcares was not found in the pkg-config search path. Perhaps you should add the directory containing `libcares.pc' to the PKG_CONFIG_PATH environment variable No package 'libcares' found [HOSTLD]Linking /Users/wenzhenxi/Downloads/grpc/bins/opt/grpc_php_plugin

最终得到了grpc_php_plugin
2、安装PHP运行依赖
最简单的方式就是直接通过pecl进行安装：

pecl install grpc pecl install protobuf

如果无法使用pecl可以使用编译的方式进行安装，PHP依赖的源文件已经存放在grpc中：

> cd grpc/src/php/ext/grpc > phpize > ./configure > make > sudo make install> git clone https://github.com/allegro/php-protobuf > phpize > ./configure > make > sudo make install

最后需要在php.ini里面增加如下内容：

extension=grpc.so extension=protobuf.so

通过phpinfo(); 可以正常看到这两个模块正常即可

PS：protobuf可以不通过扩展的方式通过composer引入也可，对效率来说更加推荐通过SO扩展，demo中已经准备了7.1和7.2版本的so文件

二，生成 PHP protobuf 文件

> cd $GOPATH/src/grpc-php-to-golang-demo/protobuf > mkdir -p php-client/helloworld > protoc --proto_path=./ --php_out=php-client/helloworld --grpc_out=php-client/helloworld --plugin=protoc-gen-grpc=../grpc_php_plugin-all/osx-64/grpc_php_pluginhelloworld.proto > cd php-client/helloworld/ > ll total 0 drwxr-xr-x4 wenzhenxistaff1282 15 15:09 ./ drwxr-xr-x3 wenzhenxistaff962 15 15:09 ../ drwxr-xr-x3 wenzhenxistaff962 15 15:09 GPBMetadata/ drwxr-xr-x5 wenzhenxistaff1602 15 15:09 Helloworld/

三，使用PHP调用go服务拷贝依赖文件：

cd $GOPATH/src/grpc-php-to-golang-demo mkdir -p php cd php mv $GOPATH/src/grpc-php-to-golang-demo/protobuf/php-client/helloworld helloworld

使用composer获取依赖文件：

> vim composer.json{ "name": "grpc/grpc-demo", "description": "gRPC example for PHP", "require": { "grpc/grpc": "^v1.3.0" }, "autoload": { "psr-4": { "": "route_guide/" } } }>composer install

编写测试文件：

> vim client.phprequire 'vendor/autoload.php'; include_once 'helloworld/Helloworld/GreeterClient.php'; include_once 'helloworld/Helloworld/HelloReply.php'; include_once 'helloworld/Helloworld/HelloRequest.php'; include_once 'helloworld/GPBMetadata/Helloworld.php'; function greet($name) { $client = new Helloworld\GreeterClient('localhost:50051', [ 'credentials' => Grpc\ChannelCredentials::createInsecure(), ]); $request = new Helloworld\HelloRequest(); $request->setName($name); list($reply, $status) = $client->SayHello($request)->wait(); $message = $reply->getMessage(); return $message; }$name = !empty($argv[1]) ? $argv[1] : 'world'; echo greet($name)."\n";

结果：