Associative array key becomes param in XML when passed to SoapClient - php

Question

I have an associative array:
$params = [
'trid' => null,
'merchantCode' => null,
'paymentMethod' => null,
'returnUrl' => site_url(null),
'notificationUrl' => site_url(null),
'language' => 'null',
'currency' => 'null',
'isTestMode' => false,
'productsXml' => null,
'needInvoice' => true,
(Nulls hold actual values in reality)
When I check __getLastRequest I completly lose the keys in the generated XML.
SoapClient,
$soap = new SoapClient(null, $options);
$soap->__soapCall('Request', $params);
$request = $soap->__getLastRequest();
Please note that I have a NON WSDL connection to the endpoint.
The generated XML will have a field value of <param[keyNum] xsi:type="xsd:typeOfVariable"> instead of having the actual key value from the associative array, <trid> for example.
<SOAP-ENV:Body><ns1:Request><param0 xsi:type="xsd:string">null</param0><param1 xsi:type="xsd:string">null</param1></Request>

Answer 1

Contrary to what the PHP manual says, it seems arguments is never interpreted as an associative array.
If we try this simple test:
<?php
$options = ['location'=>'http://localhost/unknown', 'uri'=>'test', 'trace'=>true];
$soap = new SoapClient(null, $options);
try
{
$soap->__soapCall('Request', ['foo'=>1, 'bar'=>2]);
}
catch(SoapFault $e)
{
header('Content-type: text/xml');
echo $soap->__getLastRequest();
}
?>
we get:
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns1:Request>
<param0 xsi:type="xsd:int">1</param0>
<param1 xsi:type="xsd:int">2</param1>
</ns1:Request>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
We see that the parameter names are ignored.
Now if we try what the other answer suggests (wrap the array in another array):
<?php
$options = ['location'=>'http://localhost/unknown', 'uri'=>'test', 'trace'=>true];
$soap = new SoapClient(null, $options);
try
{
$soap->__soapCall('Request', [['foo'=>1, 'bar'=>2]]);
}
catch(SoapFault $e)
{
header('Content-type: text/xml');
echo $soap->__getLastRequest();
}
?>
we get:
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="test" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:ns2="http://xml.apache.org/xml-soap" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns1:Request>
<param0 xsi:type="ns2:Map">
<item>
<key xsi:type="xsd:string">foo</key>
<value xsi:type="xsd:int">1</value>
</item>
<item>
<key xsi:type="xsd:string">bar</key>
<value xsi:type="xsd:int">2</value>
</item>
</param0>
</ns1:Request>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
We see that there is a single parameter whose type is Map. That's not what we want.
The solution is to use the SoapParam class:
<?php
$options = ['location'=>'http://localhost/unknown', 'uri'=>'test', 'trace'=>true];
$soap = new SoapClient(null, $options);
try
{
$soap->__soapCall('Request', [new SoapParam(1, 'foo'), new SoapParam(2, 'bar')]);
}
catch(SoapFault $e)
{
header('Content-type: text/xml');
echo $soap->__getLastRequest();
}
?>
Now we get what we wanted:
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<ns1:Request>
<foo xsi:type="xsd:int">1</foo>
<bar xsi:type="xsd:int">2</bar>
</ns1:Request>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
Note that you can easily convert an associative array to SOAP parameters like this:
function getSoapParams($params)
{
$a = [];
foreach($params as $name=>$value)
$a[] = new SoapParam($value, $name);
return $a;
}

Answer 2

According to notes in the documentation
If you want to call __soapCall, you must wrap the arguments in another array as follows:
$params = array('username'=>'name', 'password'=>'secret');
<?php
$client->__soapCall('login', array($params));
?>
The following line:
$soap->__soapCall('Request', $params);
Should be:
$soap->__soapCall('Request', [$params]);