html5 - essentially the client of websocket, how does php Websocket receive data?

<code>class WebsocketClient
{

    private $_Socket = null;

    public function __construct($host, $port)
    {
        $this->_connect($host, $port);
    }

    public function __destruct()
    {
        $this->_disconnect();
    }

    public function sendData($data)
    {
        // send actual data:
        return fwrite($this->_Socket, $this->encode($data)) or die('Error:' . $errno . ':' . $errstr);

        $wsData = fread($this->_Socket, 2000);
        $retData = trim($wsData, chr(0) . chr(255));

        return $retData;
    }

    private function encode($data)
    {
        $data = is_array($data) || is_object($data) ? json_encode($data) : (string)$data;
        $len = strlen($data);
        $mask = array();
        for ($j = 0; $j < 4; $j ++)
        {
            $mask[] = mt_rand(1, 255);
        }
        $head[0] = 129;
        if ($len <= 125)
        {
            $head[1] = $len;
        } elseif ($len <= 65535)
        {
            $split = str_split(sprintf('%016b', $len), 8);
            $head[1] = 126;
            $head[2] = bindec($split[0]);
            $head[3] = bindec($split[1]);
        } else
        {
            $split = str_split(sprintf('%064b', $len), 8);
            $head[1] = 127;
            for ($i = 0; $i < 8; $i ++)
            {
                $head[$i + 2] = bindec($split[$i]);
            }
            if ($head[2] > 127)
            {
                return false;
            }
        }
        $head[1] += 128;
        $head = array_merge($head, $mask);
        foreach ($head as $k => $v)
        {
            $head[$k] = chr($v);
        }
        $mask_data = '';
        for ($j = 0; $j < $len; $j ++)
        {
            $mask_data .= chr(ord($data[$j]) ^ $mask[$j % 4]);
        }

        return implode('', $head) . $mask_data;
    }

    private function _connect($host, $port)
    {
        $key1 = $this->_generateRandomString(32);
        $key2 = $this->_generateRandomString(32);
        $key3 = $this->_generateRandomString(8, false, true);
        $header = "GET ws://" . $host . ":" . $port . "/ HTTP/1.1\r\n";
        $header .= "Host: " . $host . ":" . $port . "\r\n";
        $header .= "Connection: Upgrade\r\n";
        $header .= "Pragma: no-cache\r\n";
        $header .= "Cache-Control: no-cache\r\n";
        $header .= "Upgrade: websocket\r\n";
        $header .= "Sec-WebSocket-Version: 13\r\n";
        $header .= "User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36\r\n";
        $header .= "Accept-Encoding: gzip, deflate, sdch\r\n";
        $header .= "Accept-Language: zh-CN,zh;q=0.8\r\n";
        $header .= "Sec-WebSocket-Key: " . $key1 . "\r\n";
        $header .= "Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n";
        $header .= "\r\n";
        $this->_Socket = fsockopen($host, $port, $errno, $errstr, 2);
        fwrite($this->_Socket, $header) or die('Error: ' . $errno . ':' . $errstr);
        $response = fread($this->_Socket, 2000);

        /**
         * @todo: check response here. Currently not implemented cause "2 key handshake" is already deprecated.
         * See: http://en.wikipedia.org/wiki/WebSocket#WebSocket_Protocol_Handshake
         */
        return true;
    }

    private function _disconnect()
    {
        fclose($this->_Socket);
    }

    private function _generateRandomString($length = 10, $addSpaces = true, $addNumbers = true)
    {
        $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"§$%&/()=[]{}';
        $useChars = array();
        // select some random chars:
        for ($i = 0; $i < $length; $i ++)
        {
            $useChars[] = $characters[mt_rand(0, strlen($characters) - 1)];
        }
        // add spaces and numbers:
        if ($addSpaces === true)
        {
            array_push($useChars, ' ', ' ', ' ', ' ', ' ', ' ');
        }
        if ($addNumbers === true)
        {
            array_push($useChars, rand(0, 9), rand(0, 9), rand(0, 9));
        }
        shuffle($useChars);
        $randomString = trim(implode('', $useChars));
        $randomString = substr($randomString, 0, $length);

        return $randomString;
    }
}</code>

I can send an array to the server, how to receive the data?

Reply content:

<code>class WebsocketClient
{

    private $_Socket = null;

    public function __construct($host, $port)
    {
        $this->_connect($host, $port);
    }

    public function __destruct()
    {
        $this->_disconnect();
    }

    public function sendData($data)
    {
        // send actual data:
        return fwrite($this->_Socket, $this->encode($data)) or die('Error:' . $errno . ':' . $errstr);

        $wsData = fread($this->_Socket, 2000);
        $retData = trim($wsData, chr(0) . chr(255));

        return $retData;
    }

    private function encode($data)
    {
        $data = is_array($data) || is_object($data) ? json_encode($data) : (string)$data;
        $len = strlen($data);
        $mask = array();
        for ($j = 0; $j < 4; $j ++)
        {
            $mask[] = mt_rand(1, 255);
        }
        $head[0] = 129;
        if ($len <= 125)
        {
            $head[1] = $len;
        } elseif ($len <= 65535)
        {
            $split = str_split(sprintf('%016b', $len), 8);
            $head[1] = 126;
            $head[2] = bindec($split[0]);
            $head[3] = bindec($split[1]);
        } else
        {
            $split = str_split(sprintf('%064b', $len), 8);
            $head[1] = 127;
            for ($i = 0; $i < 8; $i ++)
            {
                $head[$i + 2] = bindec($split[$i]);
            }
            if ($head[2] > 127)
            {
                return false;
            }
        }
        $head[1] += 128;
        $head = array_merge($head, $mask);
        foreach ($head as $k => $v)
        {
            $head[$k] = chr($v);
        }
        $mask_data = '';
        for ($j = 0; $j < $len; $j ++)
        {
            $mask_data .= chr(ord($data[$j]) ^ $mask[$j % 4]);
        }

        return implode('', $head) . $mask_data;
    }

    private function _connect($host, $port)
    {
        $key1 = $this->_generateRandomString(32);
        $key2 = $this->_generateRandomString(32);
        $key3 = $this->_generateRandomString(8, false, true);
        $header = "GET ws://" . $host . ":" . $port . "/ HTTP/1.1\r\n";
        $header .= "Host: " . $host . ":" . $port . "\r\n";
        $header .= "Connection: Upgrade\r\n";
        $header .= "Pragma: no-cache\r\n";
        $header .= "Cache-Control: no-cache\r\n";
        $header .= "Upgrade: websocket\r\n";
        $header .= "Sec-WebSocket-Version: 13\r\n";
        $header .= "User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36\r\n";
        $header .= "Accept-Encoding: gzip, deflate, sdch\r\n";
        $header .= "Accept-Language: zh-CN,zh;q=0.8\r\n";
        $header .= "Sec-WebSocket-Key: " . $key1 . "\r\n";
        $header .= "Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits\r\n";
        $header .= "\r\n";
        $this->_Socket = fsockopen($host, $port, $errno, $errstr, 2);
        fwrite($this->_Socket, $header) or die('Error: ' . $errno . ':' . $errstr);
        $response = fread($this->_Socket, 2000);

        /**
         * @todo: check response here. Currently not implemented cause "2 key handshake" is already deprecated.
         * See: http://en.wikipedia.org/wiki/WebSocket#WebSocket_Protocol_Handshake
         */
        return true;
    }

    private function _disconnect()
    {
        fclose($this->_Socket);
    }

    private function _generateRandomString($length = 10, $addSpaces = true, $addNumbers = true)
    {
        $characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"§$%&/()=[]{}';
        $useChars = array();
        // select some random chars:
        for ($i = 0; $i < $length; $i ++)
        {
            $useChars[] = $characters[mt_rand(0, strlen($characters) - 1)];
        }
        // add spaces and numbers:
        if ($addSpaces === true)
        {
            array_push($useChars, ' ', ' ', ' ', ' ', ' ', ' ');
        }
        if ($addNumbers === true)
        {
            array_push($useChars, rand(0, 9), rand(0, 9), rand(0, 9));
        }
        shuffle($useChars);
        $randomString = trim(implode('', $useChars));
        $randomString = substr($randomString, 0, $length);

        return $randomString;
    }
}</code>

I can send an array to the server, how to receive the data?

http://www.workerman.net/workerman-chat
You can take a look at this, a websocket chat room written in PHP. The customer service function can actually be implemented using the single chat function inside. Some people have used it to implement customer service. Including web pages and client software.
Development manual: http://workerman.net/gatewaydoc/
Demo: http://chat.workerman.net/

There are enough tutorials about php websocket on Baidu, you can check them out.

socket_read reading

Resolved Thank you very much for your answers