The PHP toolkit shipped by Salesforce is quite outdated and should not be used. There are more recent forks/community projects (one,two) that attempt to implement a modern PHP client, perhaps one of these will work for you.
A simple(r) solution is to retrieve the SecuritySettings via a plain SOAP call to the Metadata API. The request payload with API version set to 46.0
should be
<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
<types>
<members>Security</members>
<name>Settings</name>
</types>
<version>46.0</version>
</Package>
and the response looks like this (only relevant portion is shown, the actual response is much larger)
<?xml version="1.0" encoding="UTF-8"?>
<SecuritySettings xmlns="http://soap.sforce.com/2006/04/metadata">
<networkAccess>
<ipRanges>
<description>...</description>
<end>1.255.255.255</end>
<start>0.0.0.0</start>
</ipRanges>
</networkAccess>
</SecuritySettings>
Translating to PHP:
$wsdl = PUBLIC_PATH . '/wsdl-metadata.xml';
$apiVersion = 46.0;
$singlePackage = true;
$members = 'Security';
$name = 'Settings';
$params = new StdClass();
$params->retrieveRequest = new StdClass();
$params->retrieveRequest->apiVersion = $apiVersion;
$params->retrieveRequest->singlePackage = $singlePackage;
$params->retrieveRequest->unpackaged = new StdClass();
$params->retrieveRequest->unpackaged->version = $apiVersion;
$params->retrieveRequest->unpackaged->type = new stdClass();
$params->retrieveRequest->unpackaged->type->members = $members;
$params->retrieveRequest->unpackaged->type->name = $name;
$option = [
'trace' => TRUE,
];
// Namespaces
$namespace = 'http://soap.sforce.com/2006/04/metadata';
$client = new SoapClient($wsdl, $option);
$header = new SoapHeader($namespace, "SessionHeader", array ('sessionId' => $token)); // NEED: access token
$client->__setSoapHeaders($header);
$client->__setLocation($serverUrl); // NEED: service endpoint URL
$serviceResult = $client->retrieve($params);
You'll need to provide an access token ($token
) and a service endpoint ($serverUrl
).