<?php
require_once 'vendor/autoload.php';

$b24auth = new \Bitrix24Authorization\Bitrix24Authorization();

// Change example data to your own
$b24auth->setApplicationId('local.1b1231b1xfa234.12352734'); // Getting when registring Bitrix24 application
$b24auth->setApplicationSecret('q3vOqweJSasd1wDAkdL3qq13rqKDe8ffGMlFsI8Ykpasld4n0w'); // Getting when registring Bitrix24 application
$b24auth->setApplicationScope('crm,user,telephony'); // write Bitrix24 instances which you want to use via API. They need to be choosen in application at Bitrix24
$b24auth->setBitrix24Domain('your-site.bitrix24.ru'); // Address of your Bitrix24 portal
$b24auth->setBitrix24Login('your_login@gmail.com'); // login of your real user, he need to be an Admibistrator of instance you want to use
$b24auth->setBitrix24Password('your_password'); // password of your real user, he need to be an Admibistrator of instance you want to use

$b24auth->initialize();

// Now you can use object $b24auth

var_dump($b24auth->bitrix24_access); // Here you`ve got your authorization data
// Or you can just use $b24auth->initialize() - it will return the same data as property "bitrix24_access". Access token will not RE generated until it expires
?>

<?php
require_once 'vendor/autoload.php';

// Initializing object from mesilov/bitrix24-php-sdk library
$mesilov_obj = new \Bitrix24\Bitrix24();

// Initializing authorization class
$b24auth = new \Bitrix24Authorization\Bitrix24Authorization();

// Change example data to your own
$b24auth->setApplicationId('local.1b1231b1xfa234.12352734'); // Getting when registring Bitrix24 application
$b24auth->setApplicationSecret('q3vOqweJSasd1wDAkdL3qq13rqKDe8ffGMlFsI8Ykpasld4n0w'); // Getting when registring Bitrix24 application
$b24auth->setApplicationScope('crm,user,telephony'); // write Bitrix24 instances which you want to use via API. They need to be choosen in application at Bitrix24
$b24auth->setBitrix24Domain('your-site.bitrix24.ru'); // Address of your Bitrix24 portal
$b24auth->setBitrix24Login('your_login@gmail.com'); // login of your real user, he need to be an Admibistrator of instance you want to use
$b24auth->setBitrix24Password('your_password'); // password of your real user, he need to be an Admibistrator of instance you want to use

// Initializing
$mesilov_auth_obj = $b24auth->initialize($mesilov_obj);
/* Initializing with mesilov object as parameter call next methods of mesilov/bitrix24-php-sdk library:
    $mesilov_obj->setApplicationScope();
    $mesilov_obj->setApplicationId();
    $mesilov_obj->setApplicationSecret();
    $mesilov_obj->setDomain();
    $mesilov_obj->setMemberId();
    $mesilov_obj->setAccessToken();
    $mesilov_obj->setRefreshToken();
*/

// Now we can work with Bitrix24 API using library
// EXAMPLE: Lets get info about current user, who was used in authorization process
$obB24User = new \Bitrix24\User\User($mesilov_auth_obj);
$arCurrentB24User = $obB24User->current();

var_dump($arCurrentB24User);