SOAP: Invalid HTTPS client certificate path - php

Question

When I run the below-given code, the error ERROR: Invalid HTTPS client certificate path is generated. I checked that the path to certificate.pem and test.wsdl is correct. What might be the reason of such error?
$wsdl = 'http://localhost:10088/test/test.wsdl';
$options = array(
'local_cert' => 'http://localhost:10088/test/certificate.pem',
'soap_version' => SOAP_1_1
);
try {
$client = new Zend_Soap_Client($wsdl, $options);
$result = $client->getLastResponse();
print_r($result);
} catch (SoapFault $s) {
die('ERROR: [' . $s->faultcode . '] ' . $s->faultstring);
} catch (Exception $e) {
die('ERROR: ' . $e->getMessage());
}

Answer 1

The value for the option local_cert must be a file path instead of an URL. Change the code to this for $options:
$options = array(
'local_cert' => '/path_where_cert_is_stored/certificate.pem',
'soap_version' => SOAP_1_1
);
Since the documentation for Zend_Soap_Client isn't complete, you can look at PHP: SOAP - Manual for more information, because this what Zend_Soap_Client uses under the hood. In my opinion the possible arguments are better described at PHP: SoapClient::SoapClient - Manual (especially look at the example).