PHP ActiveX

WebSocket Binance Trade Stream (subscribe and receive updates)

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Subscribe to a binance trade stream and receive updates. PHP ActiveX

<?php

$success = 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$ws = new COM("Chilkat.WebSocket");

// For brevity, this example does not check for errors when etablishing the WebSocket connection.
// See Establish WebSocket Connection for more complete sample code for making the connection.

$rest = new COM("Chilkat.Rest");

// Connect to wss://stream.binance.com:9443
$success = $rest->Connect('stream.binance.com',9443,1,0);
if ($success == 0) {
    print $rest->LastErrorText . "\n";
    exit;
}

$success = $ws->UseConnection($rest);
if ($success == 0) {
    print $ws->LastErrorText . "\n";
    exit;
}

$ws->AddClientHeaders();

//  Raw streams are accessed at /ws/<streamName>
$responseBody = $rest->fullRequestNoBody('GET','/ws/btcusdt');
if ($rest->LastMethodSuccess == 0) {
    print $rest->LastErrorText . "\n";
    exit;
}

$success = $ws->ValidateServerHandshake();
if ($success != 1) {
    print $ws->LastErrorText . "\n";
    print $responseBody . "\n";
    print $rest->ResponseHeader . "\n";
    exit;
}

print $responseBody . "\n";
print $rest->ResponseHeader . "\n";

// POST JSON to subscribe to a stream

// {
// "method": "SUBSCRIBE",
// "params":
// [
// "btcusdt@aggTrade",
// "btcusdt@depth"
// ],
// "id": 1
// }

$json = new COM("Chilkat.JsonObject");
$json->UpdateString('method','SUBSCRIBE');
$json->UpdateString('params[0]','btcusdt@aggTrade');
$json->UpdateString('params[1]','btcusdt@depth');
$json->UpdateInt('id',1);

// Send a full message in a single frame
$finalFrame = 1;
$success = $ws->SendFrame($json->emit(),$finalFrame);
if ($success != 1) {
    print $ws->LastErrorText . "\n";
    exit;
}

$jsonTradeData = new COM("Chilkat.JsonObject");
$jsonTradeData->EmitCompact = 0;

// Begin reading the trade stream response.
// We'll just read the 1st 10 updates and then exit..
$receivedFinalFrame = 0;
$numTradesReceived = 0;
while ($numTradesReceived < 5) {

    $success = $ws->ReadFrame();
    if ($success != 1) {
        print 'Failed to receive a frame' . "\n";
        print 'ReadFrame fail reason = ' . $ws->ReadFrameFailReason . "\n";
        print $ws->LastErrorText . "\n";
        exit;
    }

    // The responses we desire are in Text frames, where the opcode = 1.
    if ($ws->FrameOpcodeInt == 1) {
        $receivedJson = $ws->getFrameData();

        $jsonTradeData->Load($receivedJson);
        print $jsonTradeData->emit() . "\n";

        $numTradesReceived = $numTradesReceived + 1;
    }

}

// Close the websocket connection.
$success = $ws->SendClose(1,1000,'Closing this websocket.');
if ($success != 1) {
    print $ws->LastErrorText . "\n";
    exit;
}

// Read the Close response.
$success = $ws->ReadFrame();
if ($success != 1) {
    print 'ReadFrame fail reason = ' . $ws->ReadFrameFailReason . "\n";
    print $ws->LastErrorText . "\n";
    exit;
}

print 'Success.' . "\n";

// The output of the above code is shown here:

?>