php socket 读取缓存区域详解编程语言

<?php 
 
//创建socket套接字 
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); 
//设置阻塞模式 
socket_set_block($socket); 
//为套接字绑定ip和端口 
socket_bind($socket,'127.0.0.1',3046); 
//监听socket 
socket_listen($socket,4); 
 
while(true) 
{ 
    //接收客户端请求 
    if(($msgsocket = socket_accept($socket)) !== false) 
    { 
        //读取请求内容 
        $buf = socket_read($msgsocket, 2); 
        echo "Received msg: $buf /n"; 
          $buf2 = socket_read($msgsocket, 2); 
              echo "Received msg: $buf2 /n"; 
        $str = "this is a service message"; 
        //向连接的客户端发送数据  
        socket_write($msgsocket, $str,strlen($str)); 
        //操作完之后需要关闭该连接否则 feof() 函数无法正确识别打开的句柄是否读取完成 
        socket_close($msgsocket); 
    } 
}

$buf = socket_read($msgsocket, 8192);