Php socket headers from client - php

Question

I have a socket server that handles connections. Here I have a doHandshake method.
function doHandshake($received_header, $client_socket_resource, $host_name, $port) {
var_dump($received_header);
// do stuf here with header
}
When I want to connect from javascript client, It works fine, and prints all headers such as Sec-WebSocket-Key. This is how I use doHandShake method in socket server:
$header = socket_read($newSocket, 1024);
$chatHandler->doHandshake($header, $newSocket, HOST_NAME, PORT);
In the other hand I have a php client. When I connect from php client, header is a string that I send to server not a real header. Here is my client socket in php:
$host = "127.0.0.1";
$port = 8090;
$message = "Hello Server";
echo "Message To server :".$message;
// create socket
$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n");
// connect to server
$result = socket_connect($socket, $host, $port) or die("Could not connect to server\n");
// send string to server
socket_write($socket, $message, strlen($message)) or die("Could not send data to server\n");
// get server response
$result = socket_read ($socket, 1024) or die("Could not read server response\n");
echo "Reply From Server :".$result;
// close socket
socket_close($socket);
Any idea how to send socket headers in php client??
Note: This is done automatically in javascript client.

Answer 1

The JavaScript client (a browser?) is making an HTTP request with an Upgrade header to negotiate a WebSocket connection. It's not just connecting and sending Hello Server. If you want your PHP client to do something similar, you need to implement the required protocol. The Upgrade request and the WebSocket protocol are both non-trivial to implement, so it's hard to give a quick answer, but you can partially emulate what the browser is doing like this:
$message = "GET /ws HTTP/1.1\r\n" .
"Upgrade: websocket\r\n" .
"Origin: example.com\r\n" .
"Sec-WebSocket-Key: blahblah\r\n" .
"\r\n";
You would be much better off looking for a third-party WebSocket client implemented in PHP rather than trying to write your own.