How to check is XML-RPC enabled in WordPress

XML-RPC is enabled by default for WP versions > 3.5 (with 'xmlrpc_enabled' hook which allow to disable it)For older versions, there is a field in the database (options table), which indicates if it is enabled or not.(This option is removed for wp > 3.5)

function is_xmlrpc_enabled() {    $returnBool = false;     $enabled = get_option('enable_xmlrpc'); //for ver<3.5        if($enabled) {        $returnBool = true;    }    else {        global $wp_version;        if (version_compare($wp_version, '3.5', '>=')) {            $returnBool = true; //its on by default for versions above 3.5        }        else {            $returnBool = false;        }      }    return $returnBool;}

WordPress has two test methods in its XML-RPC server:

demo.sayHello – Returns a standard “Hello!” message.demo.addTwoNumbers – Accepts an array containing two numbers and returns the sum.function sayHello()  {      $params = array();      return $this->send_request('demo.sayHello',$params);  } $objXMLRPClientWordPress = new XMLRPClientWordPress("http://localhost/wordpress31/xmlrpc.php" , "username" , "passowrd"); function send_request($requestname, $params)  {              $request = xmlrpc_encode_request($requestname, $params);              $ch = curl_init();              curl_setopt($ch, CURLOPT_POSTFIELDS, $request);              curl_setopt($ch, CURLOPT_URL, $this->XMLRPCURL);              curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);              curl_setopt($ch, CURLOPT_TIMEOUT, 1);              $results = curl_exec($ch);              curl_close($ch);              return $results;  }  

If you get the same result it means you are able to send the request properly to your WordPress XML-RPC server and receive the request properly.