composer require yushni/liq-pay-sdk
$encoder = new LiqPay\Encoder\Encoder();
$liqPay = new LiqPay\LiqPay('privateKey', 'publicKey', true, $encoder);
$payment = LiqPay\Action\Payment::pay(1.12, "cab95cee-48b8-423b-8979-1675bb452f13", "UAH", "Description")
$payment->setResultUrl('result_url');
$payment->setServerUrl('server_url');
$liqPay->generateCheckoutUrl($payment);
$liqPay->obtainCallback('data', 'signature');
$liqPay->addAction(LiqPay\Action\Payment, ['pay'])