问如何在服务器端执行未来支付

EN

curl 'https://api.paypal.com/v1/payments/authorization/4TD55050SV609544L/capture' \
-H "Content-Type: application/json" \
-H "Paypal-Application-Correlation-Id: c2edbd6e97b14ff2b19ddb8eec9d264c" \
-H "Authorization: Bearer WfXdnxmyJtdF4q59ofxuQuAAk6eEV-Njm6puht3Nk3w" \
-d '{
       "amount":{
          "currency":"USD",
          "total":"1.50"
       },
       "is_final_capture":true
    }'

static public function executePayment2( $refresh_token, $correlation_id, $fee_amount )
{
    $data = array(
        "amount" => array(
            "currency" => "USD",
            "total" => $fee_amount
        ),
        "is_final_capture" => "true"
    );

    $data_string = json_encode($data);
    $ch = curl_init( "https://api.paypal.com/v1/payments/authorization/4TD55050SV609544L/capture" );        

    curl_setopt_array( $ch, array(
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_HTTPHEADER => array(
                'Content-Type: application/json',
                'Content-Length: ' . strlen($data_string),
                'Authorization: Bearer ' . $refresh_token,      //Need to set $refresh_token
                'Paypal-Application-Correlation-Id: ' . $correlation_id      //Need to set $correlation_id
            ),
            CURLOPT_POSTFIELDS => $data_string,
            CURLOPT_RETURNTRANSFER => true
        )
    );

    $result = curl_exec( $ch );   //Make it all happen and store response   
}