php中socket的用法详解

$address = '127.0.0.1';
$port = 10005;
//创建端口
if( ($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
 echo "socket_create() failed :reason:" . socket_strerror(socket_last_error()) . "\n";
}

//绑定
if (socket_bind($sock, $address, $port) === false) {
 echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
}

//监听
if (socket_listen($sock, 5) === false) {
 echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "\n";
}

do {
 //得到一个链接
 if (($msgsock = socket_accept($sock)) === false) {
  echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "\n";
  break;
 }
 //welcome  发送到客户端
 $msg = "<font color='red'>server send:welcome</font><br/>";
 socket_write($msgsock, $msg, strlen($msg));
 echo 'read client message\n';
 $buf = socket_read($msgsock, 8192);
 $talkback = "received message:$buf\n";
 echo $talkback;
 if (false === socket_write($msgsock, $talkback, strlen($talkback))) {
  echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) ."\n";
 } else {
  echo 'send success';
 }
 socket_close($msgsock);
} while(true);
//关闭socket
socket_close($sock);
?>

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
 echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
} else {
 echo "OK. \n";
}

echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if($result === false) {
 echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
} else {
 echo "OK \n";
}
$in = "HEAD / http/1.1\r\n";
$in .= "HOST: localhost \r\n";
$in .= "Connection: close\r\n\r\n";
$out = "";
echo "sending http head request ...";
socket_write($socket, $in, strlen($in));
echo  "OK\n";

echo "Reading response:\n\n";
while ($out = socket_read($socket, 8192)) {
 echo $out;
}
echo "closeing socket..";
socket_close($socket);
echo "ok .\n\n";