Question

我正在学习socket，我在php中尝试了一些代码

<?php
error_reporting(~E_NOTICE);
set_time_limit (0);

$address = "0.0.0.0";
$port = 5000;
$max_clients = 10;

if(!($sock = socket_create(AF_INET, SOCK_STREAM, 0)))
{
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);

    die("Couldn't create socket: [$errorcode] $errormsg \n");
}

echo "Socket created \n";

// Bind the source address
if( !socket_bind($sock, $address , 5000) )
{
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);

    die("Could not bind socket : [$errorcode] $errormsg \n");
}

echo "Socket bind OK \n";

if(!socket_listen ($sock , 10))
{
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);

    die("Could not listen on socket : [$errorcode] $errormsg \n");
}

echo "Socket listen OK \n";

echo "Waiting for incoming connections... \n";

//array of client sockets
$client_socks = array();

//array of sockets to read
$read = array();

//start loop to listen for incoming connections and process existing connections
while (true) 
{
    //prepare array of readable client sockets
    $read = array();

    //first socket is the master socket
    $read[0] = $sock;

    //now add the existing client sockets
    for ($i = 0; $i < $max_clients; $i++)
    {
        if($client_socks[$i] != null)
        {
            $read[$i+1] = $client_socks[$i];
        }
    }

    //now call select - blocking call
    if(socket_select($read , $write , $except , null) === false)
    {
        $errorcode = socket_last_error();
        $errormsg = socket_strerror($errorcode);

        die("Could not listen on socket : [$errorcode] $errormsg \n");
    }

    //if ready contains the master socket, then a new connection has come in
    if (in_array($sock, $read)) 
    {
        for ($i = 0; $i < $max_clients; $i++)
        {
            if ($client_socks[$i] == null) 
            {
                $client_socks[$i] = socket_accept($sock);

                //display information about the client who is connected
                if(socket_getpeername($client_socks[$i], $address, $port))
                {
                    echo "Client $address : $port is now connected to us. \n";
                }

                //Send Welcome message to client
                $message = "Welcome to php socket server version 1.0 \n";
                $message .= "Enter a message and press enter, and i shall reply back \n";
                socket_write($client_socks[$i] , $message);
                break;
            }
        }
    }

    //check each client if they send any data
    for ($i = 0; $i < $max_clients; $i++)
    {
        if (in_array($client_socks[$i] , $read))
        {
            $input = socket_read($client_socks[$i] , 1024);

            if ($input == null) 
            {
                //zero length string meaning disconnected, remove and close the socket
                unset($client_socks[$i]);
                socket_close($client_socks[$i]);
            }

            $n = trim($input);

            $output = "OK ... $input";

            echo "Sending output to client \n";

            //send response to client
            socket_write($client_socks[$i] , $output);
        }
    }
}
?>

但是我收到了这个错误：

创建套接字警告：socket_bind（）：无法绑定地址 [10048]：每个套接字地址（协议/网络）仅使用一次通常允许地址/端口）。在第20行的C：\ xampp \ htdocs \ WebsocketTests \ phpwebsocket.php无法 bind socket：[10048]每个套接字地址只有一个用法（协议/网络地址/端口）通常是允许的。

有些人可以告诉我我的错误在哪里？

如何用php创建套接字连接？

0 个答案: