OneAPI send SMS PHP class

gistfile1.php

<?php

Class SendSMS {

	public $phone_number;

  	public function __construct($phone_number) {
    	$this->phone_number = $phone_number;
 	}

  	public function oneAPI() {		
		$url = "https://oneapi-gw.gsma.com/smssend/2_0/smsmessaging/outbound/tel%3A7511/requests"; // END POINT
		$username = 'secret'; // APP's login
		$password = 'secret'; // and psswd
		
		$request = array(
			'address' => $this->phone_number,
			'message' => 'hello world',
			'senderAddress' => 'tel:7511'
		);
		
		$request = http_build_query($request);
		
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_USERPWD, "$username:$password");
		curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
		//curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // hide output
		$output = curl_exec($ch);
		$info = curl_getinfo($ch);
		curl_close($ch);
		
		// print_r($info);
		
	}

}

$hello = new SendSMS('+1XXXXXXXXX'); // WHITE LISTED PHONE

$hello->oneAPI();