PHP method to implement communication function between client and server based on socket

This article mainly introduces the simple client-server communication function implemented by PHP based on socket. It can realize the function of the server receiving the string sent by the client, flipping it and returning to the client. Friends in need can refer to the following

Server:

<?php
  set_time_limit(0);
  $host="localhost";
  $port=1001;
  //创建一个连接
  $socket=socket_create(AF_INET,SOCK_STREAM,SOL_TCP)or die("cannot create socket\n");
  //绑定socket到端口
  $result=socket_bind($socket,$host,$port) or die("cannot bind port to socket\n");
  //开始监听这个端口
  $result=socket_listen($socket,4) or die("could not set up socket listen\n");
  //接受连接，另一个socket来处理通信
  $msgsock=socket_accept($socket) or die("cannot accept incoming connection\n");
  if($msgsock){
    echo date("Y-m-d H:i:s D a");
  }
  //读取客户端发送过来的信息
  $input=socket_read($msgsock,1024) or die("cannot read input\n");
  $input=trim($input);
  $output=strrev($input)."顺序反过来了吧\n";
  //对接收到的信息进行处理，然后返回到客户端
  socket_write($msgsock,$output,strlen($output)) or die("cannot write");
  //关闭socket连接
  socket_close($msgsock);
  socket_close($socket);
?>

Client:

##

<?php
  set_time_limit(0);
  $host="localhost";
  $port=1001;
  //创建一个socket
  $socket=socket_create(AF_INET,SOCK_STREAM,SOL_TCP)or die("cannot create socket\n");
  $conn=socket_connect($socket,$host,$port) or die("cannot connect server\n");
  if($conn){echo "client connect ok!";}
  socket_write($socket,"hello world!") or die("cannot write data\n");
  $buffer=socket_read($socket,1024,PHP_NORMAL_READ);
  if($buffer){
    echo "response was:".$buffer."\n";
  }
  socket_close($socket);
?>

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