Realtime voice call with 2 person using nexmo/vonage - php

Question

is it possible to do realtime voice call using nexmo/vonage with PHP or Javascript via web browser?
i used library called nexmo/laravel.
This sample code that i used:
$nexmo = Nexmo::calls()->create([
'to' => [[
'type' => 'phone',
'number' => '855969818674'
]],
'from' => [
'type' => 'phone',
'number' => '63282711511'
],
'answer_url' => ['https://gist.githubusercontent.com/jazz7381/d245a8f54ed318ac2cb68152929ec118/raw/6a63a20d7b1b288a84830800ab1813ebb7bac70c/ncco.json'],
'event_url' => [backpack_url('call/event')]
]);
with that code i can send text-to-speech, but how can i do realtime voice conversation person to person?

Answer 1

From the code you shared above, it looks like you might not have instantiated a client instance of the Nexmo PHP SDK, which is necessary to do so. You make an outbound call with an instantiated and authenticated client.
For example, first instantiate a client with the following, supplying the file path to your private key file, your application ID, your API key and your API secret. You can obtain all of those from the Dashboard
$basic = new \Nexmo\Client\Credentials\Basic('key', 'secret');
$keypair = new \Nexmo\Client\Credentials\Keypair(
file_get_contents((NEXMO_APPLICATION_PRIVATE_KEY_PATH),
NEXMO_APPLICATION_ID
);
$client = new \Nexmo\Client(new \Nexmo\Client\Credentials\Container($basic, $keypair));
Then, once you have a credentialed client, you can then invoke the $client->calls() methods on it. For example:
$client->calls()->create([
'to' => [[
'type' => 'phone',
'number' => '14843331234'
]],
'from' => [
'type' => 'phone',
'number' => '14843335555'
],
'answer_url' => ['https://example.com/answer'],
'event_url' => ['https://example.com/event'],
]);
You can find more information on using the PHP SDK on GitHub. You can also find code snippets, tutorials, and more instructions on our developer portal.