php编写socket服务TCP/IP

一、开启socket

默认PHP是没有开启Socket的

phpinfo();查看是否开启了socket扩展，否则在php.ini中开启

Windows下的配置
修改php.ini

extension=php_sockets.dll

二、服务器端代码的写法

<?php
 error_reporting(E_ALL);
 set_time_limit(0);
 //ob_implicit_flush();

$address = '127.0.0.1';
 $port = 10005;
 //创建端口
if( ($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
  echo "socket_create() failed :reason:" . socket_strerror(socket_last_error()) . "\n";
 }

//绑定
if (socket_bind($sock, $address, $port) === false) {
  echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
 }

//监听
if (socket_listen($sock, 5) === false) {
  echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
 }

do {
  //得到一个链接
 if (($msgsock = socket_accept($sock)) === false) {
   echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "\n";
   break;
  }
  //welcome  发送到客户端
 $msg = "<font color='red'>server send:welcome</font><br/>";
  socket_write($msgsock, $msg, strlen($msg));
  echo 'read client message\n';
  $buf = socket_read($msgsock, 8192);
  $talkback = "received message:$buf\n";
  echo $talkback;
  if (false === socket_write($msgsock, $talkback, strlen($talkback))) {
   echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) ."\n";
  } else {
   echo 'send success';
  }
  socket_close($msgsock);
 } while(true);
 //关闭socket
 socket_close($sock);
 ?>

服务器端需要在cli模式是执行，有可能cli模式下php.ini文件载入的不一样

可以像如下输出：

这时候在zhoxh目录下就有个tem.text文件。查看 Configuration File (php.ini) Path => C:\WINDOWS 。不是我的php.ini 文件，这说明调用的php.ini文件时错误的。这时候我们要指定php.ini文件命令如下

注意的是我的php可以直接执行时配置了环境变量。

三、客户端

<?php
 //error_reporting(E_ALL);
 echo "<h2>tcp/ip connection </h2>\n";
 $service_port = 10005;
 $address = '127.0.0.1';

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
 if ($socket === false) {
  echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
 } else {
  echo "OK. \n";
 }

echo "Attempting to connect to '$address' on port '$service_port'...";
 $result = socket_connect($socket, $address, $service_port);
 if($result === false) {
  echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
 } else {
  echo "OK \n";
 }
 $in = "HEAD / http/1.1\r\n";
 $in .= "HOST: localhost \r\n";
 $in .= "Connection: close\r\n\r\n";
 $out = "";
 echo "sending http head request ...";
 socket_write($socket, $in, strlen($in));
 echo  "OK\n";

echo "Reading response:\n\n";
 while ($out = socket_read($socket, 8192)) {
  echo $out;
 }
 echo "closeing socket..";
 socket_close($socket);
 echo "ok .\n\n";

执行结果如下：
server: