PHP TCP协议事例

1.设置php.ini,将下列功能打开

extension=php_sockets.dll

2.PHP TCP服务端

 <?php 
//确保在连接客户端时不会超时 
set_time_limit(0); 
//设置IP和端口号 
$address = "127.0.0.1"; 
$port = 3046; 
/** 
 * 创建一个SOCKET 
 * AF_INET=是ipv4 如果用ipv6，则参数为 AF_INET6 
 * SOCK_STREAM为socket的tcp类型，如果是UDP则使用SOCK_DGRAM 
*/ 
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() fail:" . socket_strerror(socket_last_error()) . "/n"); 
//阻塞模式 
socket_set_block($sock) or die("socket_set_block() fail:" . socket_strerror(socket_last_error()) . "/n"); 
//绑定到socket端口 
$result = socket_bind($sock, $address, $port) or die("socket_bind() fail:" . socket_strerror(socket_last_error()) . "/n"); 
//开始监听 
$result = socket_listen($sock, 4) or die("socket_listen() fail:" . socket_strerror(socket_last_error()) . "/n"); 
echo "OK\nBinding the socket on $address:$port ... "; 
echo "OK\nNow ready to accept connections.\nListening on the socket ... \n"; 
do { // never stop the daemon 
 //它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 
 $msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n"); 
 while(1){ 
 //读取客户端数据 
 echo "Read client data \n"; 
 //socket_read函数会一直读取客户端数据,直到遇见\n,\t或者\0字符.PHP脚本把这写字符看做是输入的结束符. 
 $buf = socket_read($msgsock, 8192); 
 echo "Received msg: $buf \n"; 
 
 if($buf == "bye"){ 
 //接收到结束消息，关闭连接，等待下一个连接 
 socket_close($msgsock); 
 continue; 
 } 
 
 //数据传送 向客户端写入返回结果 
 $msg = "welcome \n"; 
 socket_write($msgsock, $msg, strlen($msg)) or die("socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n"); 
 } 
 
} while (true); 
socket_close($sock); 
?>

3.PHP TCP客户端

 <?php 
set_time_limit(0); 
 
$host = "127.0.0.1"; 
$port = 3046; 
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create socket\n"); 
 
$connection = socket_connect($socket, $host, $port) or die("Could not connet server\n"); 
socket_write($socket, "hello socket") or die("Write failed\n"); 
while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) { 
 echo("Response was:" . $buff . "\n"); 
 echo("input what you want to say to the server:\n"); 
 $text = fgets(STDIN); 
 socket_write($socket, $text); 
} 
socket_close($socket); 
?>