分析PHP如何快速创建RPC服务（代码演示）

<?php
class RpcServer {
    protected $serv = null;
 
    public function __construct($host, $port, $path) {
        //创建一个tcp socket服务
        $this->serv = stream_socket_server("tcp://{$host}:{$port}", $errno, $errstr);
        if (!$this->serv) {
            exit("{$errno} : {$errstr} \n");
        }
        //判断我们的RPC服务目录是否存在
        $realPath = realpath(__DIR__ . $path);
        if ($realPath === false || !file_exists($realPath)) {
            exit("{$path} error \n");
        }
 
        while (true) {
            $client = stream_socket_accept($this->serv);
 
            if ($client) {
                //这里为了简单，我们一次性读取
                $buf = fread($client, 2048);
                //解析客户端发送过来的协议
                $classRet = preg_match(&#39;/Rpc-Class:\s(.*);\r\n/i&#39;, $buf, $class);
                $methodRet = preg_match(&#39;/Rpc-Method:\s(.*);\r\n/i&#39;, $buf, $method);
                $paramsRet = preg_match(&#39;/Rpc-Params:\s(.*);\r\n/i&#39;, $buf, $params);
                 
                if($classRet && $methodRet) {
                    $class = ucfirst($class[1]);
                    $file = $realPath . &#39;/&#39; . $class . &#39;.php&#39;;
                    //判断文件是否存在，如果有，则引入文件
                    if(file_exists($file)) {
                        require_once $file;
                        //实例化类，并调用客户端指定的方法
                        $obj = new $class();
                        //如果有参数，则传入指定参数
                        if(!$paramsRet) {
                            $data = $obj->$method[1]();
                        } else {
                            $data = $obj->$method[1](json_decode($params[1], true));
                        }
                        //把运行后的结果返回给客户端
                        fwrite($client, $data);
                    }
                } else {
                    fwrite($client, &#39;class or method error&#39;);
                }
                //关闭客户端
                fclose($client);
            }
        }
    }
 
    public function __destruct() {
        fclose($this->serv);
    }
}
 
new RpcServer(&#39;127.0.0.1&#39;, 8888, &#39;./service&#39;);

<?php
 
class RpcClient {
    protected $urlInfo = array();
     
    public function __construct($url) {
        //解析URL
        $this->urlInfo = parse_url($url);
        if(!$this->urlInfo) {
            exit("{$url} error \n");
        }
    }
     
    public function __call($method, $params) {
        //创建一个客户端
        $client = stream_socket_client("tcp://{$this->urlInfo[&#39;host&#39;]}:{$this->urlInfo[&#39;port&#39;]}", $errno, $errstr);
        if (!$client) {
            exit("{$errno} : {$errstr} \n");
        }
        //传递调用的类名
        $class = basename($this->urlInfo[&#39;path&#39;]);
        $proto = "Rpc-Class: {$class};" . PHP_EOL;
        //传递调用的方法名
        $proto .= "Rpc-Method: {$method};" . PHP_EOL;
        //传递方法的参数
        $params = json_encode($params);
        $proto .= "Rpc-Params: {$params};" . PHP_EOL;
        //向服务端发送我们自定义的协议数据
        fwrite($client, $proto);
        //读取服务端传来的数据
        $data = fread($client, 2048);
        //关闭客户端
        fclose($client);
        return $data;
    }
}
 
$cli = new RpcClient(&#39;http://127.0.0.1:8888/test&#39;);
echo $cli->hehe();
echo $cli->hehe2(array(&#39;name&#39; => &#39;test&#39;, &#39;age&#39; => 27));

> php RpcServer.php
> php RpcClient.php

<?php
class Test {
 public function hehe() {
 return &#39;hehe&#39;;
 }
 public function hehe2($params) {
 return json_encode($params);
 }
}