我有一个GPS追踪器，通过GPRS连接连接并发送数据至特定的公共服务器:端口。
我可以定义GPS设备的ip:端口。
我的问题是，我是否可以在我的服务器上打开一个端口，并使用PHP监听/保存接收到的数据呢？
谢谢。
如何使用PHP监听TCP端口？
14
- gustyaquino
8
1http://php.net/manual/en/function.socket-listen.php? - Madara's Ghost
GPS追踪器的品牌和型号是什么？大多数我知道的也支持HTTP GET。 - Baba
@hakre 我的限制更多是关于服务器，PHP能否在一个关闭端口的服务器上创建一个套接字？ - gustyaquino
@hakre 我的意思是，我刚刚安装了一个新的服务器，唯一的服务就是Apache（80），而且一切都是默认设置。下一步该做什么？iptables？ - gustyaquino
我认为你在Ubuntu服务器支持论坛中讨论你所拥有的各种问题会更容易入门（这是一个非常广泛的话题），这样你会获得更多成功。 - hakre
显示剩余3条评论
3个回答
16
编辑 / 更新于 2017 年 8 月 16 日： 用户和库作者 <@Navarr> 发布了新的更新版本的库，我的原始答案中的代码基于此。新代码链接在他的 github 页面上（点击此处）。您可以自由探索新代码，并参考原例子来获取更多信息（我没有亲自探索或使用新代码）。
下面的代码将使用在此处找到的 SocketServer.class.php 文件。它旨在作为独立进程运行，这意味着在 Linux 下，我必须使该文件可执行，然后使用“php my_server.php”从命令行运行它。 有关从命令行运行 php 脚本的更多信息，请访问： http://www.funphp.com/?p=33
首先，请在此处获取 SocketServer.class.php 文件： http://www.phpclasses.org/browse/file/31975.html
尝试使用它，然后根据需要调整以处理接收自己的传入数据。希望它能帮到您。
<?php
require_once("SocketServer.class.php"); // Include the File
$server = new SocketServer("192.168.1.6",31337); // Create a Server binding to the given ip address and listen to port 31337 for connections
$server->max_clients = 10; // Allow no more than 10 people to connect at a time
$server->hook("CONNECT","handle_connect"); // Run handle_connect every time someone connects
$server->hook("INPUT","handle_input"); // Run handle_input whenever text is sent to the server
$server->infinite_loop(); // Run Server Code Until Process is terminated.
function handle_connect(&$server,&$client,$input)
{
SocketServer::socket_write_smart($client->socket,"String? ","");
}
function handle_input(&$server,&$client,$input)
{
// You probably want to sanitize your inputs here
$trim = trim($input); // Trim the input, Remove Line Endings and Extra Whitespace.
if(strtolower($trim) == "quit") // User Wants to quit the server
{
SocketServer::socket_write_smart($client->socket,"Oh... Goodbye..."); // Give the user a sad goodbye message, meany!
$server->disconnect($client->server_clients_index); // Disconnect this client.
return; // Ends the function
}
$output = strrev($trim); // Reverse the String
SocketServer::socket_write_smart($client->socket,$output); // Send the Client back the String
SocketServer::socket_write_smart($client->socket,"String? ",""); // Request Another String
}
编辑：为了保持本答案的相关性和功能性，我认为最好不要继续依赖来自外部源代码的代码，因为该代码可能不会始终可用（或在我链接中提供的给定URL）。因此，为了方便起见，我在下面添加了与我在本帖子顶部链接到的SocketServer.class.php文件相对应的代码。（抱歉长度可能较长，并且复制/粘贴时可能缺少缩进/格式，我不是下面代码的作者）。
<?php
/*! @class SocketServer
@author Navarr Barnier
@abstract A Framework for creating a multi-client server using the PHP language.
*/
class SocketServer
{
/*! @var config
@abstract Array - an array of configuration information used by the server.
*/
protected $config;
/*! @var hooks
@abstract Array - a dictionary of hooks and the callbacks attached to them.
*/
protected $hooks;
/*! @var master_socket
@abstract resource - The master socket used by the server.
*/
protected $master_socket;
/*! @var max_clients
@abstract unsigned int - The maximum number of clients allowed to connect.
*/
public $max_clients = 10;
/*! @var max_read
@abstract unsigned int - The maximum number of bytes to read from a socket at a single time.
*/
public $max_read = 1024;
/*! @var clients
@abstract Array - an array of connected clients.
*/
public $clients;
/*! @function __construct
@abstract Creates the socket and starts listening to it.
@param string - IP Address to bind to, NULL for default.
@param int - Port to bind to
@result void
*/
public function __construct($bind_ip,$port)
{
set_time_limit(0);
$this->hooks = array();
$this->config["ip"] = $bind_ip;
$this->config["port"] = $port;
$this->master_socket = socket_create(AF_INET, SOCK_STREAM, 0);
socket_bind($this->master_socket,$this->config["ip"],$this->config["port"]) or die("Issue Binding");
socket_getsockname($this->master_socket,$bind_ip,$port);
socket_listen($this->master_socket);
SocketServer::debug("Listenting for connections on {$bind_ip}:{$port}");
}
/*! @function hook
@abstract Adds a function to be called whenever a certain action happens. Can be extended in your implementation.
@param string - Command
@param callback- Function to Call.
@see unhook
@see trigger_hooks
@result void
*/
public function hook($command,$function)
{
$command = strtoupper($command);
if(!isset($this->hooks[$command])) { $this->hooks[$command] = array(); }
$k = array_search($function,$this->hooks[$command]);
if($k === FALSE)
{
$this->hooks[$command][] = $function;
}
}
/*! @function unhook
@abstract Deletes a function from the call list for a certain action. Can be extended in your implementation.
@param string - Command
@param callback- Function to Delete from Call List
@see hook
@see trigger_hooks
@result void
*/
public function unhook($command = NULL,$function)
{
$command = strtoupper($command);
if($command !== NULL)
{
$k = array_search($function,$this->hooks[$command]);
if($k !== FALSE)
{
unset($this->hooks[$command][$k]);
}
} else {
$k = array_search($this->user_funcs,$function);
if($k !== FALSE)
{
unset($this->user_funcs[$k]);
}
}
}
/*! @function loop_once
@abstract Runs the class's actions once.
@discussion Should only be used if you want to run additional checks during server operation. Otherwise, use infinite_loop()
@param void
@see infinite_loop
@result bool - True
*/
public function loop_once()
{
// Setup Clients Listen Socket For Reading
$read[0] = $this->master_socket;
for($i = 0; $i < $this->max_clients; $i++)
{
if(isset($this->clients[$i]))
{
$read[$i + 1] = $this->clients[$i]->socket;
}
}
// Set up a blocking call to socket_select
if(socket_select($read,$write = NULL, $except = NULL, $tv_sec = 5) < 1)
{
// SocketServer::debug("Problem blocking socket_select?");
return true;
}
// Handle new Connections
if(in_array($this->master_socket, $read))
{
for($i = 0; $i < $this->max_clients; $i++)
{
if(empty($this->clients[$i]))
{
$temp_sock = $this->master_socket;
$this->clients[$i] = new SocketServerClient($this->master_socket,$i);
$this->trigger_hooks("CONNECT",$this->clients[$i],"");
break;
}
elseif($i == ($this->max_clients-1))
{
SocketServer::debug("Too many clients... :( ");
}
}
}
// Handle Input
for($i = 0; $i < $this->max_clients; $i++) // for each client
{
if(isset($this->clients[$i]))
{
if(in_array($this->clients[$i]->socket, $read))
{
$input = socket_read($this->clients[$i]->socket, $this->max_read);
if($input == null)
{
$this->disconnect($i);
}
else
{
SocketServer::debug("{$i}@{$this->clients[$i]->ip} --> {$input}");
$this->trigger_hooks("INPUT",$this->clients[$i],$input);
}
}
}
}
return true;
}
/*! @function disconnect
@abstract Disconnects a client from the server.
@param int - Index of the client to disconnect.
@param string - Message to send to the hooks
@result void
*/
public function disconnect($client_index,$message = "")
{
$i = $client_index;
SocketServer::debug("Client {$i} from {$this->clients[$i]->ip} Disconnecting");
$this->trigger_hooks("DISCONNECT",$this->clients[$i],$message);
$this->clients[$i]->destroy();
unset($this->clients[$i]);
}
/*! @function trigger_hooks
@abstract Triggers Hooks for a certain command.
@param string - Command who's hooks you want to trigger.
@param object - The client who activated this command.
@param string - The input from the client, or a message to be sent to the hooks.
@result void
*/
public function trigger_hooks($command,&$client,$input)
{
if(isset($this->hooks[$command]))
{
foreach($this->hooks[$command] as $function)
{
SocketServer::debug("Triggering Hook '{$function}' for '{$command}'");
$continue = call_user_func($function,$this,$client,$input);
if($continue === FALSE) { break; }
}
}
}
/*! @function infinite_loop
@abstract Runs the server code until the server is shut down.
@see loop_once
@param void
@result void
*/
public function infinite_loop()
{
$test = true;
do
{
$test = $this->loop_once();
}
while($test);
}
/*! @function debug
@static
@abstract Outputs Text directly.
@discussion Yeah, should probably make a way to turn this off.
@param string - Text to Output
@result void
*/
public static function debug($text)
{
echo("{$text}\r\n");
}
/*! @function socket_write_smart
@static
@abstract Writes data to the socket, including the length of the data, and ends it with a CRLF unless specified.
@discussion It is perfectly valid for socket_write_smart to return zero which means no bytes have been written. Be sure to use the === operator to check for FALSE in case of an error.
@param resource- Socket Instance
@param string - Data to write to the socket.
@param string - Data to end the line with. Specify a "" if you don't want a line end sent.
@result mixed - Returns the number of bytes successfully written to the socket or FALSE on failure. The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual explanation of the error.
*/
public static function socket_write_smart(&$sock,$string,$crlf = "\r\n")
{
SocketServer::debug("<-- {$string}");
if($crlf) { $string = "{$string}{$crlf}"; }
return socket_write($sock,$string,strlen($string));
}
/*! @function __get
@abstract Magic Method used for allowing the reading of protected variables.
@discussion You never need to use this method, simply calling $server->variable works because of this method's existence.
@param string - Variable to retrieve
@result mixed - Returns the reference to the variable called.
*/
function &__get($name)
{
return $this->{$name};
}
}
/*! @class SocketServerClient
@author Navarr Barnier
@abstract A Client Instance for use with SocketServer
*/
class SocketServerClient
{
/*! @var socket
@abstract resource - The client's socket resource, for sending and receiving data with.
*/
protected $socket;
/*! @var ip
@abstract string - The client's IP address, as seen by the server.
*/
protected $ip;
/*! @var hostname
@abstract string - The client's hostname, as seen by the server.
@discussion This variable is only set after calling lookup_hostname, as hostname lookups can take up a decent amount of time.
@see lookup_hostname
*/
protected $hostname;
/*! @var server_clients_index
@abstract int - The index of this client in the SocketServer's client array.
*/
protected $server_clients_index;
/*! @function __construct
@param resource- The resource of the socket the client is connecting by, generally the master socket.
@param int - The Index in the Server's client array.
@result void
*/
public function __construct(&$socket,$i)
{
$this->server_clients_index = $i;
$this->socket = socket_accept($socket) or die("Failed to Accept");
SocketServer::debug("New Client Connected");
socket_getpeername($this->socket,$ip);
$this->ip = $ip;
}
/*! @function lookup_hostname
@abstract Searches for the user's hostname and stores the result to hostname.
@see hostname
@param void
@result string - The hostname on success or the IP address on failure.
*/
public function lookup_hostname()
{
$this->hostname = gethostbyaddr($this->ip);
return $this->hostname;
}
/*! @function destroy
@abstract Closes the socket. Thats pretty much it.
@param void
@result void
*/
public function destroy()
{
socket_close($this->socket);
}
function &__get($name)
{
return $this->{$name};
}
function __isset($name)
{
return isset($this->{$name});
}
}
- Brandon K
9
这个脚本必须在同一台服务器上运行，对吗？ - gustyaquino
太好了，我改变了端口号，现在它可以工作了。我将尝试将 GPS 重定向到我的地址。 - gustyaquino
在Linux上，您可以使用
netstat --listen命令验证某个端口是否正在本地侦听，以防出现关于套接字已在使用中的错误。如果是这样，那么您需要删除该进程才能绑定到该端口。这次使用netstat -tulpn并查找绑定到该套接字的进程的PID，最后使用kill [pid]来删除该进程。现在您应该能够绑定到该套接字了。 - Brandon K如果您能够重构代码，使用我在https://github.com/navarr/Sockets上的新库，我将不胜感激。SocketServer.class.php现在有些过时了 :) - Navarr
@BrandonK 谢谢 :) 如果我有一些空闲时间（可惜的是，不太可能），我宁愿提交对你的答案本身的编辑，因为它已经被接受并且正确（只是过时了） - Navarr
显示剩余4条评论
11
使用socket_create，socket_bind，socket_listen和socket_accept来实现。这些函数的详细用法可以参考以下链接：
http://www.php.net/manual/zh/function.socket-create.php
http://www.php.net/manual/zh/function.socket-bind.php
http://www.php.net/manual/zh/function.socket-listen.php
http://www.php.net/manual/zh/function.socket-accept.php
以上链接中有很多使用示例，可以帮助您更好地理解。
- hexist
2
1服务器有没有进行任何操作？打开了端口吗？ - gustyaquino
是的，你可以在
socket_bind 调用中指定。 - hexist1
是的，PHP提供了一个socket_listen()函数来实现这个功能。http://php.net/manual/zh/function.socket-listen.php。
- Madara's Ghost
网页内容由stack overflow 提供, 点击上面的可以查看英文原文，
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