I have been using SOAP API to call some functions. In current
scenario i'm passing login and password for authentication,
which can be retrieved as $_SERVER['PHP_AUTH_PW'] -Password.
Now i want to pass API key also to authenicate. How should i
modify the Server Code to accept API key similar to Username or
Password.  This is how i used to call SOAP API function. try {
$client = new SoapClient("wsdl", array(                 'login'
=> 'user',                 'password' => 'password'
$result = $client->functioname(); } catch(SoapFault $ex) {