bug fixed: array_intersect([ "protocol1" ], [ "protocol1,subprotocol2" ])

[clwu88]

my nodejs websocket server use these code:

const WebSocket = require('ws');

const wss = new WebSocket.Server({
                                    server : 'localhost',
                                    port   : 8888
                                 }); 

wss.on('connection', function connection(ws) {
    ws.on('message', function incoming(message) {
        ws.send(message); // echo
    }); 
})

my php websocket client use these code:

$reactConnector = new \React\Socket\Connector($loop, [ 'timeout' => 10 ]);
$connector = new \Ratchet\Client\Connector($loop, $reactConnector);
 
$connector('ws://127.0.0.1:8888', ['protocol1',  'subprotocol2'], ['Origin' => 'http://localhost'])

but I got a bug on my php code ,
php client code

// array_intersect([ "protocol1" ], [ "protocol1,subprotocol2" ])  has a bug
array_intersect($responseHeader, $requestHeader);

// array_intersect([ "protocol1" ], [ "protocol1", "subprotocol2" ]) this is what we want

so I make this pull request

[mbonneau]

@clwu88 Thanks for the catch! This is resolved in #40 along with another edge case.