PHP Extension

WebSocket Binance Trade Stream (subscribe and receive updates)

See more WebSocket Examples

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

<?php

include("chilkat.php");

$success = false;

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

$ws = new CkWebSocket();

// 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 CkRest();

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

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

$ws->AddClientHeaders();

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

$success = $ws->ValidateServerHandshake();
if ($success != true) {
    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 CkJsonObject();
$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 = true;
$success = $ws->SendFrame($json->emit(),$finalFrame);
if ($success != true) {
    print $ws->lastErrorText() . "\n";
    exit;
}

$jsonTradeData = new CkJsonObject();
$jsonTradeData->put_EmitCompact(false);

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

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

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

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

        $numTradesReceived = $numTradesReceived + 1;
    }

}

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

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

print 'Success.' . "\n";

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

?>