Websocket handshake connection error in PHP - php

Question

Error showing in console : WebSocket connection to
'ws://localhost/socket/php-socket.php/wss' failed: Error during
WebSocket handshake: Unexpected response code: 200
PHP Code :
$newSocket = socket_accept($socketResource);
$clientSocketArray[] = $newSocket;
$header = socket_read($newSocket, 1024);
$chatHandler->doHandshake($header, $newSocket, HOST_NAME, PORT);
enter code here
Handshake function :
function doHandshake($received_header,$client_socket_resource, $host_name, $port) {
$headers = array();
$lines = preg_split("/\r\n/", $received_header);
foreach($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')));
$buffer = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $host_name\r\n" .
"WebSocket-Location: ws://$host_name:$port/demo/shout.php\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
socket_write($client_socket_resource,$buffer,strlen($buffer));
}
Javascript Code :
var websocket = new WebSocket("ws://localhost/socket/php-socket.php");
websocket.onopen = function(event) {
showMessage("<div class='chat-connection-ack'>Connection is established!</div>");
}