kann nicht über Rest api Rechnung erstellen in magento 2.0

Question

Ich habe den Code unten Rechnung bestellen in magento 2,0

<?php 
$adminUrl='http://xxxxx/index.php/rest/V1/integration/admin/token'; 
$ch = curl_init(); 
$data = array("username" => "xxxxx", "password" => "xxxxx");                  
$data_string = json_encode($data);      
$ch = curl_init($adminUrl); 
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");                  
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);                 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);                  
curl_setopt($ch, CURLOPT_HTTPHEADER, array(                   
    'Content-Type: application/json',                     
    'Content-Length: ' . strlen($data_string))                  
    );  
$token = curl_exec($ch); 
$token= json_decode($token); 
$headers = array("Authorization: Bearer $token"); 
$requestUrl1='http://xxxxx/index.php/rest/V1/invoices'; 
$ch1 = curl_init(); 
$ch1 = curl_init($requestUrl1); 
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
curl_setopt($ch, CURLOPT_POST, 1); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
$result1 = curl_exec($ch1); 
$result1= json_decode($result1); 
print_r($result1); 
?> 

Es gab mir

{"message":"%fieldName is a required field.","parameters":{"fieldName":"entity"}} 

Answer 1

Versuch zu erstellen wie Rechnungsdaten weitergeben dies

$setHaders = array('Content-Type:application/json','Authorization:Bearer '.$adminToken); 

    $productData='{"entity":{"orderId":6,"items":[{"orderItemId":9,"qty":1},{"orderItemId":10,"qty":1}],"comments":[],"extensionAttributes":{}}}'; 

    $requestURL= "{magento-url}/rest//V1/invoices"; 

    $ch = curl_init(); 
    curl_setopt($ch,CURLOPT_URL, $requestURL); 

    curl_setopt($ch,CURLOPT_POSTFIELDS, $productData); 

    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); 
    curl_setopt($ch, CURLOPT_HTTPHEADER, $setHaders); 
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 

$result = curl_exec($ch);