<PixiGetChangedItemStockSincePost200TextXmlResponse>
  <RowNr>0</RowNr>
  <ItemKey>0</ItemKey>
  <ItemNrInt>string</ItemNrInt>
  <EANUPC>string</EANUPC>
  <ItemNrSuppl>string</ItemNrSuppl>
  <PhysicalStock>0</PhysicalStock>
  <AvailableStock>0</AvailableStock>
  <EstimatedDelivery>string</EstimatedDelivery>
  <MinStockQty>0</MinStockQty>
  <Enabled>true</Enabled>
  <OpenSupplierOrderQTY>0</OpenSupplierOrderQTY>
  <UpdateDate>string</UpdateDate>
  <BundleItem>true</BundleItem>
  <OpenSupplOrdersQty>0</OpenSupplOrdersQty>
</PixiGetChangedItemStockSincePost200TextXmlResponse>

POST https://apigateway.descartes.com/tms/pixi/
Content-Type: text/xml; charset=utf-8
# echo -n '{{username}}:{{password}}' | base64 | pbcopy
Authorization: Basic {{token}}

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
                   xmlns:ns1="https://apigateway.descartes.com/tms/pixi/"
                   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
    <SOAP-ENV:Body>
        <ns1:pixiGetChangedItemStockSince>
            <Since xsi:type="xsd:string">YYYY-MM-DD hh:mm:ss</Since> <!-- required -->
            <Start xsi:type="xsd:integer">123</Start>
            <Rowcount xsi:type="xsd:integer">123</Rowcount>
        </ns1:pixiGetChangedItemStockSince>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

<?php

getPixiSoapClientResponse('pixiGetChangedItemStockSince', [
    'Since' => 'YYYY-MM-DD hh:mm:ss', // string (required)
    'Start' => '123', // integer
    'Rowcount' => '123', // integer
]);

function getPixiSoapClientResponse(string $method, array $arguments = [])
{
    $soapArguments = [];
    foreach ($arguments as $key => $value) {
        $soapArguments[] = new SoapVar($value, null, '', '', $key);
    }

    $soapClient = new SoapClient(null, [
        'login' => '...',
        'password' => '...',
        'uri' => 'https://apigateway.descartes.com/tms/pixi/',
        'location' => 'https://apigateway.descartes.com/tms/pixi/',
    ]);

    return $soapClient->__call($method, $soapArguments);
}