PHP編程實(shí)現(xiàn)的TCP服務(wù)端和客戶端功能示例

?php
//確保在連接客戶端時(shí)不會(huì)超時(shí)
set_time_limit(0);
//設(shè)置IP和端口號(hào)
$address = "127.0.0.1";
$port = 3046;
/**
 * 創(chuàng)建一個(gè)SOCKET
 * AF_INET=是ipv4 如果用ipv6，則參數(shù)為 AF_INET6
 * SOCK_STREAM為socket的tcp類(lèi)型，如果是UDP則使用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");
//綁定到socket端口
$result = socket_bind($sock, $address, $port) or die("socket_bind() fail:" . socket_strerror(socket_last_error()) . "/n");
//開(kāi)始監(jiān)聽(tīng)
$result = socket_listen($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
  //它接收連接請(qǐng)求并調(diào)用一個(gè)子連接Socket來(lái)處理客戶端和服務(wù)器間的信息
  $msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n");
  while(1){
    //讀取客戶端數(shù)據(jù)
    echo "Read client data \n";
    //socket_read函數(shù)會(huì)一直讀取客戶端數(shù)據(jù),直到遇見(jiàn)\n,\t或者\(yùn)0字符.PHP腳本把這寫(xiě)字符看做是輸入的結(jié)束符.
    $buf = socket_read($msgsock, 8192);
    echo "Received msg: $buf  \n";
    if($buf == "bye"){
      //接收到結(jié)束消息，關(guān)閉連接，等待下一個(gè)連接
      socket_close($msgsock);
      continue;
    }
    //數(shù)據(jù)傳送 向客戶端寫(xiě)入返回結(jié)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);
?>

?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);
?>