I want to create configurable product and its related simple products at the same time via API.

For example: shoes; with different sizes(attribute=shoesize).. as like:

Prada’s new shoe (configurable product)… And it’s child sizes: 36 => stock: 4 (simple product), 37 => stock: 2(simple product) etc..

I’m recently using the code at below, to add simple products; could someone help me to update my code to resolve my need?

<?php $  url = "http://www.example.com/"; $  token_url=$  url."rest/V1/integration/admin/token"; $  product_url=$  url. "rest/V1/products"; $  ch = curl_init(); $  data = array("username" => username, "password" => password); $  data_string = json_encode($  data); $  ch = curl_init($  token_url); 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); $  adminToken=  json_decode($  token);  $  sampleProductData = array( 'sku'               => 'SAMPLESKU', 'name'              => 'sample product', 'visibility'        => 4, 'type_id'           => 'simple', 'price'             => '200', 'status'            => 1, 'attribute_set_id'  => 101, 'weight'            => 1, 'manufacturer'            => 25, 'extension_attributes' => array(         "stock_item"=>array(                 'qty' => $  inventory_stock,'is_in_stock' => 1,'manage_stock' => 1,'use_config_manage_stock' => 1,'min_qty' => 0,'use_config_min_qty' => 1,'min_sale_qty' => 1,'use_config_min_sale_qty' => 1,'max_sale_qty ' => 10,'use_config_max_sale_qty' => 1,'is_qty_decimal' => 0,'backorders' => 0,'use_config_backorders' => 1,'notify_stock_qty' => 1,'use_config_notify_stock_qty' => 1         ), ), 'custom_attributes' => array(     array( 'attribute_code' => 'category_ids', 'value' => ["6"] ),     array( 'attribute_code' => 'description', 'value' => 'xxxxx' ),     array( 'attribute_code' => 'short_description', 'value' => 'xxxxx' ),     array( 'attribute_code' => 'meta_title', 'value' => 'xxxxx'),     array( 'attribute_code' => 'meta_keyword', 'value' => 'xxxxx'),     array( 'attribute_code' => 'meta_description', 'value' => 'xxxxx'), ),     );  $  productData = json_encode(array('product' => $  sampleProductData));  $  setHaders = array('Content-    Type:application/json','Authorization:Bearer '.$  adminToken);  $  ch = curl_init(); curl_setopt($  ch,CURLOPT_URL, $  product_url); 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); $  response = curl_exec($  ch); $  response=  json_decode($  response); echo $  response; curl_close($  ch);  ?>