<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');
$client = new SoapClient('http://cssincusa.com/api/v2_soap?wsdl');
$session = $client->login((object)array('username' => 'test', 'apiKey' => 'soapapi'));


$result = $client->catalogProductCreate((object)array('sessionId' => $session->result, 'storeView'=>0, 'type' => 'simple', 'set' => '4', 'sku' => 'product_sku1',
    'productData' => ((object)array(
        //'type'  =>  'simple',
        'categories' => array(112),
        //'websites' => [1, 0],
        'website_ids'   =>  array(1),
        'name' => 'Product name1',
        'description' => 'Product description',
        'short_description' => 'Product short description',
        'weight' => 10,
        'status' => 1,
        'url_key' => 'product-url-key',
        'url_path' => 'product-url-path',
        'visibility' => 2,
        'tax_class_id' => 0,
        'meta_title' => 'Product meta title',
        'meta_keyword' => 'Product meta keyword',
        'meta_description' => 'Product meta description',
        'stock_data' => array(
            'is_in_stock '  =>  1,
            'qty'   =>  100,
            'manage_stock'  =>  1,
            'notify_stock_qty'  =>  1,
            'backorders'    => 1,
            'use_config_backorders' =>  1,

        )
    ))));
var_dump($result);