php - Cpanel create new folder with php code in cpanel

I have been trying to create a script to login to my clients cpanel and create files or folders this my code so far i would like to get some help please. I am using xml api to access my clients accounts.

<?php 
  include("xmlapi/xmlapi.php"); 

  $ip = "127.0.0.1"; 
  $auth_user = $_POST['txtcpusername']; 
  $auth_pass = $_POST['txtcppassword']; 

 //this is the part I am not sure about 
 $xmlapi->api2_query($username, "Fileman", "addf", 
 array("op"=>"unlink", "sourcefiles"=>''/public_html/subdomain.domain')
 );