php使用socket

1. 服务端（server.php）：

   <?php 
   set_time_limit(0);
   // 设置主机和端口
   $host = "127.0.0.1";
   $port = 12387;
   // 创建一个tcp流
   $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) 
   or die("socket_create() failed:" . socket_strerror(socket_last_error()));
   // 设置阻塞模式
   socket_set_block($socket) 
   or die("socket_set_block() failed:" . socket_strerror(socket_last_error()));  
   // 绑定到端口
   socket_bind($socket, $host, $port) 
   or die("socket_bind() failed:" . socket_strerror(socket_last_error()));
   // 开始监听
   socket_listen($socket, 4) 
   or die("socket_listen() failed:" . socket_strerror(socket_last_error()));
   echo "Binding the socket on $host:$port ... \n";
   while (true) {
   // 接收连接请求并调用一个子连接Socket来处理客户端和服务器间的信息
   if (($msgsock = socket_accept($socket)) < 0) {
       echo "socket_accept() failed:" . socket_strerror(socket_last_error());
   }else{
       // 读数据
       $out = '';
       while($buf = socket_read($msgsock,8192)){
           $out .= $buf;
       }
       // 写数据
       $in = "数据是 $out";
       socket_write($msgsock, $in, strlen($in));
   }
   // 结束通信
   socket_close($msgsock);
   }
   socket_close($socket);

2. 客户端（client.php）：

   <?php 
   set_time_limit(0);
   $host = "127.0.0.1";  
   $port = 12387;
   // 创建一个tcp流
   $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) 
   or die("socket_create() failed:" . socket_strerror(socket_last_error()));
   echo "try to connect to $host:$port...\n";
   $result = socket_connect($socket, $host, $port)
   or die("socket_connect() failed:" . socket_strerror(socket_last_error()));
   $in = "hello \n";
   if(!socket_write($socket, $in, strlen($in))) {
   echo "socket_write() failed:" . socket_strerror($socket);
   }else {
   echo "发送成功！\n";
   }
   $out = '';
   while($buf = socket_read($socket, 8192)) {
   $out .= $buf;
   }
   echo "接受内容为：$out \n";
   socket_close($socket);