Error using SoapClient() in PHP - soap

Question

I'm trying to access WSDL(Web Service Definition Language) file using SoapClient() of PHP. I found that WSDL file is authenticated. I tried with passing credentials on an array by another parameter and active SSL on my server, still I'm getting an error.
Here is the code I'm using:
$client = new
SoapClient("https://webservices.chargepointportal.net:8081/coulomb_api_1.1.wsdl",array("trace"
=> "1","Username" => "username","Password" => "password"));
Here is the error I'm getting:
Warning:
SoapClient::SoapClient(https://webservices.chargepointportal.net:8081/coulomb_api_1.1.wsdl)
[soapclient.soapclient]: failed to open stream: Connection timed out
in PATH_TO_FILE on line 80
Warning: SoapClient::SoapClient() [soapclient.soapclient]: I/O warning
: failed to load external entity
"https://webservices.chargepointportal.net:8081/coulomb_api_1.1.wsdl"
in PATH_TO_FILE on line 80
Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing
WSDL: Couldn't load from
'https://webservices.chargepointportal.net:8081/coulomb_api_1.1.wsdl'
: failed to load external entity
"https://webservices.chargepointportal.net:8081/coulomb_api_1.1.wsdl"
in PATH_TO_FILE:80 Stack trace: #0
/home2/wingstec/public_html/widget/API/index.php(80):
SoapClient->SoapClient('https://webserv...', Array) #1 {main} thrown
in PATH_TO_FILE on line 80
It seems that error says file not exist at the path we given but when we run that path directly on browser then we're getting that file
Can anyone help me to figure out what the exactly problem is?

Answer 1

First make sure you have the right to access website from your hosting account or server - check first if you can access a http webservice (without the s). If not, check if allow_url_fopen is set to true in php.ini.
Then, if you are trying to establish a https connection, you need a local certificate.
See if you can add one and instantiate your Soap object using something like
new SoapClient($wsdl, array('local_cert' => $pathToLocalCert));