How can I set my php variables in Nexmo code - php

Question

I an setting up a website to send SMS automatically by API key Nexmo. But whene I add my variables into the Nexmo code, this one not work. How can I add my variables please?
I added my php variables to the Nexmo SMS default code but no result, but whene I trayed there code the stuff work fine
my file phone.php , with $row["phone_number"]=212981416807 at this exemple
$text1 = "Hello";
$text2 = " this is my company";
$MyNexmoID_Account = "3896321";
$MyNexmoAPI_Key = "yhg784frds78jkim";
$to = $row["phone_number"];
$from = "my company";
$text = "$text1 $text2";
// Code to Send SMS with Code Recharge ------
require_once "vendor/autoload.php";
//composer require nexmo/client;
$basic = new \Nexmo\Client\Credentials\Basic('$MyNexmoID_Account', '$MyNexmoAPI_Key');
$client = new \Nexmo\Client($basic);
$message = $client->message()->send([
'to' => '$to',
'from' => '$from',
'text' => '$text'
]);
if ($message && $client && $basic){echo " Recharge Code Sent Correctlly.";}else{echo "Failed! Recharge Code Not Sent.";}
// End Code to Send SMS with Code Recharge -----
This is default Nexmo code:
require_once "vendor/autoload.php";
//composer require nexmo/client;
$basic = new \Nexmo\Client\Credentials\Basic('3896321', 'yhg784frds78jkim');
$client = new \Nexmo\Client($basic);
$message = $client->message()->send([
'to' => '212981416807',
'from' => 'Nexmo',
'text' => 'Hello Nexmo'
]);

Answer 1

You don't need to quote variables. Try this:
$message = $client->message()->send([
'to' => $to,
'from' => $from,
'text' => $text
]);

Answer 2

Not sure if you have corrected this but do check your country code, I had a similar error with variable (also do listen to Michael Heap), where the hard code for the US phone number was 19091234567 and my database number was 9091234567. Unlike Twilio, Nexmo needs the country code. Hope it helps.