using twilio account how to create a dynamic conference call for voiceurl in php

I am trying to upload using client on twilio and trying buy a twilio number.

Also, I need to get a dynamic voice URL in order to record a conference call dynamically.

<?php


require_once 'vendor/autoload.php'; // Loads the library
use Twilio\Rest\Client;

// Your Account Sid and Auth Token from twilio.com/user/account
$sid = "*********************";
$token = "*******************";
$client = new Client($sid, $token);


$numbers = $client->availablePhoneNumbers('US')->local->read(
    array("areaCode" => "424")
);

$twilioNumber = $numbers[0]->phoneNumber;

$newNumber = $client->incomingPhoneNumbers->create(
            [
            "voiceUrl" => "host url",
            "voiceMethod" => "GET"
            ]
        );

if ($newNumber) {
            return $twilioNumber;
        } else {
            return 0;
        }
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// In the voiceUrl parameter i am passing a conference call connect code hosted link but its not getting updated to twilio account dynamically.