SOAP-ERROR: Parsing WSDL: Couldn't load from URL Failed to load External Entity

Question

I'm trying to get all products in $productArrarray from magento 2 API via SOAP client. I tried the below function but it throws this error:

Error:

SOAP-ERROR: Parsing WSDL: Couldn't load from 'https://shop.mysite.com/soap/default?wsdl&services=catalogProductRepositoryV1' : failed to load external entity "https://shop.mysite.com/soap/default?wsdl&services=catalogProductRepositoryV1"

Code:

public function getMagentoProducts() {
 $productArr = array('' => 'Select Product');
 try {
 $request = new SoapClient("https://shop.mysite.com/soap/?wsdl&services=integrationAdminTokenServiceV1", array("soap_version" => SOAP_1_2));
 $token = $request->integrationAdminTokenServiceV1CreateAdminAccessToken(array("username"=>"user", "password"=>"pass"));
 $opts = array(
 'http'=>array(
 'header' => 'Authorization: Bearer '.json_decode($token->result),
 'user_agent' => 'PHPSoapClient'
 ),
 'ssl' => array(
 'verify_peer' => false,
 'verify_peer_name' => false,
 'allow_self_signed' => true
 )
 );
 $wsdlUrl = 'https://shop.mysite.com/soap/default?wsdl&services=catalogProductRepositoryV1';
 $context = stream_context_create($opts);
 $soapClientOptions = array(
 'stream_context' => $context,
 'cache_wsdl' => WSDL_CACHE_NONE
 );
 libxml_disable_entity_loader(false);
 $soapClient = new SoapClient($wsdlUrl, ['version' => SOAP_1_2, 'context' => $soapClientOptions]);
 var_dump($soapClient);exit;
 $soapResponse = $soapClient->__getFunctions();
 } catch (Exception $e) {
 $this->forward404($e->getMessage());
 }
 }

Answer 1

If you are using a development site with an SSL that is not signed by a major CA, then when PHP goes to load external entities from your domain, your SSL certificate can cause this error.

I just had to add my root CA certificate that signed my SSL to the trusted roots of my server and the error went away.

For Ubuntu 16.04 I added the PEM version of my root CA to /usr/local/share/ca-certificates then ran sudo update-ca-certificates and it was added.

Answer 2

I made this error go away by enabling the php module openssl (Windows server)