<?php  set_time_limit(0);  $host="localhost";  $port=1001;  //創建一個連接  $socket=socket_create(AF_INET,SOCK_STREAM,SOL_TCP)or die("cannot create socket/n");  //綁定socket到端口  $result=socket_bind($socket,$host,$port) or die("cannot bind port to socket/n");  //開始監聽這個端口  $result=socket_listen($socket,4) or die("could not set up socket listen/n");  //接受連接，另一個socket來處理通信  $msgsock=socket_accept($socket) or die("cannot accept incoming connection/n");  if($msgsock){    echo date("Y-m-d H:i:s D a");  }  //讀取客戶端發送過來的信息  $input=socket_read($msgsock,1024) or die("cannot read input/n");  $input=trim($input);  $output=strrev($input)."順序反過來了吧/n";  //對接收到的信息進行處理，然后返回到客戶端  socket_write($msgsock,$output,strlen($output)) or die("cannot write");  //關閉socket連接  socket_close($msgsock);  socket_close($socket);?>

<?php  set_time_limit(0);  $host="localhost";  $port=1001;  //創建一個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);?>