Fatal error: Class 'Client' not found in - wordpress

Question

I got an error while adding Twilio SMS APi to my website. My site is in wordpress and using Woo commerce.
Error : Fatal error: Class 'Client' not found in /var/www/html/++++/wp-content/themes/dokan-theme-v2.2.2-child/functions.php on line 4583
My code is below:
function wl8OrderPlacedTriggerSomething($order_id){
//do something...
//echo get_stylesheet_directory_uri(). '/twilio-php-master/Twilio/Rest/Client.php';
require_once( get_stylesheet_directory_uri(). '/twilio-php-master/Twilio/autoload.php');
require( get_stylesheet_directory_uri(). '/twilio-php-master/Twilio/Rest/Client.php');
// Use the REST API Client to make requests to the Twilio REST API
// use Twilio\Rest\Client;
// Your Account SID and Auth Token from twilio.com/console
$sid = 'xxxxxxxxxxxxxxxxxxxxxx';
$token = 'xxxxxxxxxxxxxxxx';
$client = new Client($sid, $token);
// Use the client to do fun stuff like send text messages!
$client->messages->create(
// the number you'd like to send the message to (xxxxxxx)
'xxxxxxxxx',
array(
// A Twilio phone number you purchased at twilio.com/console
'from' => '+xxxxxxx',
// the body of the text message you'd like to send
'body' => "Hey Jenny! Good luck on the bar exam!"
)
);
}
Please help me for the same.
Thank you,

Answer 1

Twilio developer evangelist here.
I think you may need to use the fully qualified namespace for the Client in this case. Try:
$client = new Twilio\Rest\Client($sid, $token);
Let me know if that helps.
Edit
OK, that didn't work. After reading around, I've found that it's not recommended to use require or require_once within a function. I'd recommend you require the autoload file outside of your function, use the namespace and then call the Client inside the function. Like this:
require_once( get_stylesheet_directory_uri(). '/twilio-php-master/Twilio/autoload.php');
use Twilio\Rest\Client;
function wl8OrderPlacedTriggerSomething($order_id){
$sid = 'xxxxxxxxxxxxxxxxxxxxxx';
$token = 'xxxxxxxxxxxxxxxx';
$client = new Client($sid, $token);
// and so on...
}

Answer 2

make sure that autoload.php and Client.php files are getting loaded properly.
its unable to load client call