服务器无法从PHP套接字读取数据

我正在创建一个命令行PHP程序，它使用套接字监听与telnet连接的用户，读取要在服务器数据库上运行的命令

问题是我无法获取发送回服务器的内容。这是系统代码

<?php

/*****************************************************************/
/*                                                               */
/*  Welcome to the ISH.                                          */
/*  You will need to configure this file to connect to Gen's     */
/*  Servers correctly.                                           */
/*  It is possible to be banned from this tool. Do NOT abuse it. */
/*  -Alex                                                        */
/*****************************************************************/

//Configuration
error_reporting(0);
$connection_ip = "*****";
$connection_port = 43597;
$max_clients = 10;

$Server = new GenISH();
$Server->databaseConnect();
$Server->connect();
$Server->bind();
$Server->listen();
$Server->MainLoop();

class GenISH
{
    public $connection_ip;
    public $connection_port;
    public $socket;
    public $max_clients;
    public $read;
    public $connected_clients;
    public $databaseConnection;

    //User data
    public $username;

    public function checkBanned($ip)
    {
        $query = mysqli_query($this->databaseConnection, "SELECT * FROM `ish_bans` WHERE `ip` = '$ip'");
        if(mysqli_num_rows($query) >= 1)
        {
            return true;
        }else
        {
            return false;
        }
    }

    public function getBanReason($ip)
    {
        $query = mysqli_query($this->databaseConnection, "SELECT * FROM `ish_bans` WHERE `ip` = '$ip'") or die(mysqli_error($this->databaseConnection));
        $row = mysqli_fetch_assoc($query);
        return $row["reason"];
    }

    public function databaseConnect()
    {
        $this->databaseConnection = mysqli_connect("localhost", "root", "GenDatabase123", "gen");
        echo "Server: Connected to database\n";
    }

    public function showError($error)
    {
        $ec = socket_last_error();
        $errmsg = socket_strerror($ec);
        echo $error = "Error! Could not $error socket! [$ec] $errmsg";
    }

    public function __construct()
    {
        global $connection_ip, $connection_port, $max_clients;
        $this->connection_ip = $connection_ip;
        $this->connection_port = $connection_port;
        $this->max_clients = $max_clients;
    }

    public function connect()
    {
        echo "Server: Connecting!\n";
        if(!($this->socket = socket_create(AF_INET, SOCK_STREAM, 0)))
        {
            $this->showError("connect");
        }else
        {
            echo "Server: Connected!\n";
        }
    }

    public function bind()
    {
        echo "Server: binding socket!\n";
        if(!(socket_bind($this->socket, $this->connection_ip, $this->connection_port)))
        {
            echo "Server: Failed to bind!\n";
        }else
        {
            echo "Server: Socket bind successful!\n";
        }
    }

    public function listen()
    {
        if(!(socket_listen($this->socket, 10)))
        {
            echo "Server: Failed to listen on socket!\n";
        }else
        {
            echo "Server: Initialization complete!\nServer: Listening for connections on port $this->connection_port!\n";
        }
    }

    public function send($client, $message)
    {
        socket_write($client, $message);
    }

    public function getUserData($client)
    {
        $query = mysqli_query($this->databaseConnection, "SELECT * FROM `users` WHERE `ip_last` = '$client'");
        if(mysqli_num_rows($query) <= 0)
        {
            $this->username = "Unkown...";
        }else
        {
            $row = mysqli_fetch_assoc($query);
            $this->username = $row["username"];
        }
    }

    public function MainLoop()
    {
        $this->read = array();
        $this->connected_clients = array();

        while(true)
        {
            $this->read = array();

            //Set Master socket
            $this->read[0] = $this->socket;

            for($i = 0; $i < $this->max_clients; $i++)
            {
                if($this->connected_clients[$i] != null)
                {
                    //An exmple of how this works is
                    //this adds one to the read and makes it equal to the connected client.
                    $this->read[$i+1] = $this->connected_clients[$i];
                }
            }

            if(socket_select($this->read, $write, $except, null) == false)
            {
                $this->showError("listen on");
            }

            if(in_array($this->socket, $this->read))
            {
                for($i = 0; $i < $this->max_clients;$i++)
                {
                    //Null clients mean their connection has not been accepted.
                    if($this->connected_clients[$i] == null)
                    {
                        $this->connected_clients[$i] = socket_accept($this->socket);
                        if(socket_getpeername($this->connected_clients[$i], $ip, $port))
                        {
                            if($this->checkBanned($ip) == true)
                            {
                                echo "Connection from $ip was blocked.\n";
                                socket_write($this->connected_clients[$i], "You are banned from using the ISH for the following reason:");
                                $reason = $this->getBanReason($ip);
                                socket_write($this->connected_clients[$i], "\r\n");
                                socket_write($this->connected_clients[$i], $reason);
                                socket_close($this->connected_clients[$i]);
                            }else
                            {
                                echo "Connection from $ip was accepted.\n";
                                $this->send($this->connected_clients[$i], "Connection accepted!\n");
                                $this->send($this->connected_clients[$i], "\r\n");
                                $this->send($this->connected_clients[$i], "Retrieving user data.\n");
                                $this->getUserData($ip);
                                $this->send($this->connected_clients[$i], "\r\n");
                                $this->send($this->connected_clients[$i], "Welcome ".$this->username);
                            }
                        }
                        break;
                    }
                }
            }


            for($i = 0; $i < $this->max_clients; $i++)
            {
                if(in_array($this->connected_clients[$i], $this->read))
                {
                    $input = socket_read($this->connected_clients[$i], 1024);
                    if($input == null)
                    {
                        if(socket_getpeername($this->connected_clients[$i], $ip, $port))
                        {
                            echo "$ip disconnected from port $port.\n";
                        }
                        socket_close($this->connected_clients[$i]);
                        unset($this->connected_clients[$i]);
                    }
                }                   
            }
            if($input == "login")
            {
                echo "LOGIN CALLED!";
            }else
            {
                echo $input;
            }
        }
    }
}


?>

---

在Stackoverflow，我们想知道您的问题，而不是系统手册。事实上，您应该将整个过程简化为一个简单的测试用例（不包含所有数据库部分），例如20行或更少，并更多地关注您尝试读取输入的代码。否则，即使经过大量编辑，它也可能被其他人关闭。顺便说一句，由于您实际上是在创建代码，请记住mysql和mysqli扩展已被弃用，应该用PDO替换。@LelioFaieta mysqli（尚未）。。。但我也不喜欢；）你是Java程序员吗？你为什么要编写自己的telnet服务器？@symcbean这是为了在我的服务器上进行测试，看看我能在PHP上走多远。我只是觉得拥有它会很酷。

if($input == "login")
{   
    echo "LOGIN CALLED!";           
}else
{
    echo $input;            
}