Php Websocket未获取套接字信息

我最近刚刚尝试为我的新客户端聊天设置一个Web套接字

我正在本地主机上运行XAMPP，并确保我的套接字位置正确

由于聊天信息已发送或已连接，该套接字连接到聊天室！但当我刷新页面时，消息将丢失，并且命令提示符显示此错误：

以下是我的server.php代码：

<?php
$host = 'localhost'; //host
$port = '900'; //port
$null = NULL; //null var

//Create TCP/IP sream socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//reuseable port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);

//bind socket to specified host
socket_bind($socket, 0, $port);

//listen to port
socket_listen($socket);

//create & add listning socket to the list
$clients = array($socket);

//start endless loop, so that our script doesn't stop
while (true) {
    //manage multipal connections
    $changed = $clients;
    //returns the socket resources in $changed array
    socket_select($changed, $null, $null, 0, 10);

    //check for new socket
    if (in_array($socket, $changed)) {
        $socket_new = socket_accept($socket); //accpet new socket
        $clients[] = $socket_new; //add socket to client array

        $header = socket_read($socket_new, 1024); //read data sent by the socket
        perform_handshaking($header, $socket_new, $host, $port); //perform websocket handshake

        socket_getpeername($socket_new, $ip); //get ip address of connected socket
        $response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' connected'))); //prepare json data
        send_message($response); //notify all users about new connection

        //make room for new socket
        $found_socket = array_search($socket, $changed);
        unset($changed[$found_socket]);
    }

    //loop through all connected sockets
    foreach ($changed as $changed_socket) { 

        //check for any incomming data
        while(socket_recv($changed_socket, $buf, 1024, 0) >= 1)
        {
            $received_text = unmask($buf); //unmask data
            $tst_msg = json_decode($received_text); //json decode 
            $user_name = $tst_msg->name; //sender name
            $user_message = $tst_msg->message; //message text
            $user_color = $tst_msg->color; //color

            //prepare data to be sent to client
            $response_text = mask(json_encode(array('type'=>'usermsg', 'name'=>$user_name, 'message'=>$user_message, 'color'=>$user_color)));
            send_message($response_text); //send data
            break 2; //exist this loop
        }

        $buf = @socket_read($changed_socket, 1024, PHP_NORMAL_READ);
        if ($buf === false) { // check disconnected client
            // remove client for $clients array
            $found_socket = array_search($changed_socket, $clients);
            socket_getpeername($changed_socket, $ip);
            unset($clients[$found_socket]);

            //notify all users about disconnected connection
            $response = mask(json_encode(array('type'=>'system', 'message'=>$ip.' disconnected')));
            send_message($response);
        }
    }
}
// close the listening socket
socket_close($socket);

function send_message($msg)
{
    global $clients;
    foreach($clients as $changed_socket)
    {
        @socket_write($changed_socket,$msg,strlen($msg));
    }
    return true;
}


//Unmask incoming framed message
function unmask($text) {
    $length = ord($text[1]) & 127;
    if($length == 126) {
        $masks = substr($text, 4, 4);
        $data = substr($text, 8);
    }
    elseif($length == 127) {
        $masks = substr($text, 10, 4);
        $data = substr($text, 14);
    }
    else {
        $masks = substr($text, 2, 4);
        $data = substr($text, 6);
    }
    $text = "";
    for ($i = 0; $i < strlen($data); ++$i) {
        $text .= $data[$i] ^ $masks[$i%4];
    }
    return $text;
}

//Encode message for transfer to client.
function mask($text)
{
    $b1 = 0x80 | (0x1 & 0x0f);
    $length = strlen($text);

    if($length <= 125)
        $header = pack('CC', $b1, $length);
    elseif($length > 125 && $length < 65536)
        $header = pack('CCn', $b1, 126, $length);
    elseif($length >= 65536)
        $header = pack('CCNN', $b1, 127, $length);
    return $header.$text;
}

//handshake new client.
function perform_handshaking($receved_header,$client_conn, $host, $port)
{
    $headers = array();
    $lines = preg_split("/\r\n/", $receved_header);
    foreach($lines as $line)
    {
        $line = chop($line);
        if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
        {
            $headers[$matches[1]] = $matches[2];
        }
    }

    $secKey = $headers['Sec-WebSocket-Key'];
    $secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
    //hand shaking header
    $upgrade  = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
    "Upgrade: websocket\r\n" .
    "Connection: Upgrade\r\n" .
    "WebSocket-Origin: $host\r\n" .
    "WebSocket-Location: ws://$host:$port/demo/shout.php\r\n".
    "Sec-WebSocket-Accept:$secAccept\r\n\r\n";
    socket_write($client_conn,$upgrade,strlen($upgrade));
}

---

如果要在页面刷新时加载所有以前的消息，则需要将消息存储在数据库或其他存储器中。然后，当用户第一次连接时，您需要检索它们并将它们发送给用户。此外，您可以将您的ws-connection修改为“ws://localhost:900

，您不需要它：

“ws://localhost:900/New%20Login%20System/HazzJay/chat/server.php”

此外，我强烈建议您研究Ratchet（）因为它已经用一种更干净的方式为你做了很多事情。

    <script type="text/javascript">
        $(document).ready(function() {
            //create a new WebSocket object.
            var wsUri = "ws://localhost:900/New%20Login%20System/HazzJay/chat/server.php";
            websocket = new WebSocket(wsUri); 

            websocket.onopen = function(ev) { // connection is open 
                $('#message_box').append("<div class=\"system_msg\">Connected!</div>"); //notify user
            }

            $('#send-btn').click(function(){ //use clicks message send button   
                var mymessage = $('#message').val(); //get message text
                var myname = $('#name').val(); //get user name

                if(myname == ""){ //empty name?
                    alert("Enter your Name please!");
                    return;
                }
                if(mymessage == ""){ //emtpy message?
                    alert("Enter Some message Please!");
                    return;
                }
                document.getElementById("name").style.visibility = "hidden";

                var objDiv = document.getElementById("message_box");
                objDiv.scrollTop = objDiv.scrollHeight;
                //prepare json data
                var msg = {
                message: mymessage,
                name: myname,
                color : '<?php echo $colours[$user_colour]; ?>'
                };
                //convert and send data to server
                websocket.send(JSON.stringify(msg));
            });

            //#### Message received from server?
            websocket.onmessage = function(ev) {
                var msg = JSON.parse(ev.data); //PHP sends Json data
                var type = msg.type; //message type
                var umsg = msg.message; //message text
                var uname = msg.name; //user name
                var ucolor = msg.color; //color

                if(type == 'usermsg') 
                {
                    $('#message_box').append("<div><span class=\"user_name\" style=\"color:#"+ucolor+"\">"+uname+"</span> : <span class=\"user_message\">"+umsg+"</span></div>");
                }
                if(type == 'system')
                {
                    $('#message_box').append("<div class=\"system_msg\">"+umsg+"</div>");
                }

                $('#message').val(''); //reset text

                var objDiv = document.getElementById("message_box");
                objDiv.scrollTop = objDiv.scrollHeight;
            };

            websocket.onerror   = function(ev){$('#message_box').append("<div class=\"system_error\">Error Occurred - "+ev.data+"</div>");}; 
            websocket.onclose   = function(ev){$('#message_box').append("<div class=\"system_msg\">Connection Closed</div>");}; 
        });
</script>