$PayPal = new PayPal('admin_paypal_email@gmail.com', 'passs');

$PayPal->payOut('user_paypal_email@gmail.com', 100, 'USD');

if($PayPal->isSuccessPayout()){
    // ok
}

$PayPal->payOut([
    [
    'user_paypal_email' => 'user1_paypal_email@gmail.com'
    'amount' => 100,
    'currency' => 'USD'
    ],[
    'user_paypal_email' => 'user2_paypal_email@gmail.com'
    'amount' => 50,
    'currency' => 'USD'
    ],[
    'user_paypal_email' => 'user3_paypal_email@gmail.com'
    'amount' => 150,
    'currency' => 'USD'
    ],[
    'user_paypal_email' => 'user4_paypal_email@gmail.com'
    'amount' => 70,
    'currency' => 'USD'
    ],
]);