var ably = new Ably.Realtime('[API_KEY]');
var channel = ably.channels.get('channel-name');

// Publish a message to the channel-name channel
channel.publish('greeting', 'hello');
    

      
AblyRealtime ably = new AblyRealtime("[API_KEY]");
Channel channel = ably.channels.get("channel-name");

/* Publish a message to the channel-name channel */
channel.publish("greeting", "hello");
    

      
ARTRest *ably = [[ARTRealtime alloc] initWithKey:@"[API_KEY]"];
ARTRealtimeChannel *channel = [ably.channels get:@"channel-name"];

// Publish a message to the channel-name channel
[channel publish:@"greeting" data:@"hello"];
    

      
let ably = ARTRealtime(key: "[API_KEY]")
let channel = ably.channels.get("channel-name")

/// Publish a message to the channel-name channel
channel.publish("greeting", data: "hello")
    

      
var ably = new AblyRealtime("[API_KEY]");
var channel = ably.Channels.Get("channel-name");

// Publish a message to the channel-name channel
channel.Publish("greeting", "hello");
    

      
var ably = new require('ably').Realtime('[API_KEY]');
var channel = ably.channels.get('channel-name');

// Publish a message to the channel-name channel
channel.publish('greeting', 'hello');
    

      
$ably = new Ably\AblyRest('[API_KEY]');
$channel = $ably->channel('channel-name');

// Publish a message to the channel-name channel
$channel->publish('greeting', 'Hello!');
    

      
AblyRealtime ably = new AblyRealtime("[API_KEY]");
Channel channel = ably.channels.get("channel-name");

/* Publish a message to the channel-name channel */
channel.publish("greeting", "hello");
    

      
# Need to wrap within an EventMachine reactor which provides an asynchronous evented framework for the library to run within.
EventMachine.run do
  ably = Ably::Realtime.new('[API_KEY]')
end
channel = ably.channels.get('channel-name')

# Publish a message to the channel-name channel
channel.publish 'greeting', 'hello'
    

      
ably = AblyRest('[API_KEY]')
channel = ably.channels.get('channel-name')

# Publish a message to the channel-name channel
channel.publish('greeting', 'hello')
    

      
options := ably.NewClientOptions("[API_KEY]")
ably, err := ably.NewRealtimeClient(options)
channel := ably.Channels.Get("channel-name")

/* Publish a message to the channel-name channel */
channel.Publish("greeting", "hello")
    

      
# Copy and paste the curl command below into your console to try this demo now
# Publish a message to the channel-name channel

curl -X POST https://rest.ably.io/channels/channel-name/messages \
  -u '[API_KEY]' \
  --data 'name=greeting&data=hello'
    

      
// Subscribe to messages on channel
channel.subscribe('greeting', function(message) {
  alert(message.data);
});
    

      
/* Subscribe to messages on channel */
MessageListener listener;
listener = new MessageListener() {
  @Override
  public void onMessage(Message message) {
    System.out.print(message.data);
  }};
};
channel.subscribe("greeting", listener);
    

      
// Subscribe to messages on channel
[channel subscribe:@"greeting" callback:^(ARTMessage *message) {
  NSLog(@"%@", message.data);
}];
    

      
/// Subscribe to messages on channel
channel.subscribe("greeting") { message in
  print("\(message.data)")
}
    

      
/* Subscribe to messages on channel */

channel.Subscribe("greeting", (message) => {
  Console.WriteLine(message.data);
});
    

      
// Subscribe to messages on channel
channel.subscribe('greeting', function(message) {
  console.log(message.data);
});
    

      
// Subscribe only supported by Realtime client library SDKs such as Javascript, iOS, Android
// PHP supports history to retrieve messages over REST

$messagesPage = $channel->history();
echo($messagesPage->items[0]->data);
    

      
/* Subscribe to messages on channel */

MessageListener listener;
listener = new MessageListener() {
  @Override
  public void onMessage(Message message) {
    System.out.print(message.data);
  }};
};
channel.subscribe("greeting", listener);
    

      
# Subscribe to messages on channel

channel.subscribe 'greeting' do |message|
  puts message.data
end
    

      
# Subscribe only supported by Realtime client library SDKs such as Javascript, iOS, Android
# Python supports history to retrieve messages over REST

message_page = channel.history()
print(messagesPage.items[0].data)
    

      
/* Subscribe to messages on channel */

sub, err := channel.Subscribe()
if err != nil {
    // Handle err
}
for msg := range sub.MessageChannel() {
    fmt.Println(msg.Data)
}
    

      
# Your browser is already subscribed to messages on channel channel-name
# Copy and paste the curl command into your console now to see Ably realtime in action