Multidimensional Array with PHP Soap Client - php

Question

I'm trying to create a SOAP Client, but I need to send a multi-dimensional array (I think) as requested in the documentation, example below:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://services.senior.com.br">
<soapenv:Body>
<ser:ColaboradoresAdmitidos>
<user>String</user>
<password>String</password>
<encryption>Integer</encryption>
<parameters>
<NumEmp>Integer</NumEmp>
<AbrTipCol>String</AbrTipCol>
<IniPer>DateTime</IniPer>
<FimPer>DateTime</FimPer>
</parameters>
</ser:ColaboradoresAdmitidos>
</soapenv:Body>
</soapenv:Envelope>
I create a array like this:
$arguments = [
'user' => 'xxxxx',
'password' => 'xxxxxxxxxx',
'encryption' => 0,
'parameters' => array(
'NumEmp' => 1,
'AbrTipCol' => '1',
'IniPer' => '01/01/2019',
'FimPer' => null
),
];
$client = new SoapClient($url, array('trace' => 1));
dd($arguments, $client->__soapCall("colaboradoresAdmitidos", $arguments), $client->__getLastRequest());
However in the request, it seems that it does not accept the array, in fact I did some tests, and in addition to the first 3 parameters, but none enter the generated XML.
I already made the array in different ways, and changed the parameter value, but it always returns as below:
<?xml version="1.0" encoding="UTF-8"?>\n
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://services.senior.com.br">
<SOAP-ENV:Body>
<ns1:ColaboradoresAdmitidos>
<user>xxxxxxx</user>
<password>xxxxxxxxx</password>
<encryption>0</encryption>
<parameters/>
</ns1:ColaboradoresAdmitidos>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
Someone could help me, because the server understands that the parameter is missing, so I can't execute the query.

Answer 1

Searching the internet, I discovered a lot of people with this problem and who couldn't solve it. I discovered the error.
This happens when the parameters do not match those registered in the WSDL. in my case: the documentation mentions the parameters with a capital letter, however, I had to use it with a small letter.
It seems that the parameter key has to be the same value as the one registered in wsdl.
ex:
$arguments = [
'user' => 'xxxxx',
'password' => 'xxxxxxxxxx',
'encryption' => 0,
'parameters' => array(
'numEmp' => 1,
'abrTipCol' => '1',
'iniPer' => '01/01/2019',
'fimPer' => null
)];