<form class="form-signin" form action="" method="post">
        <center><h2 class="form-signin-heading"><span class="glyphicon glyphicon-th-large"></span> PerPusWeb </h2></center>
        <div class="input-group">
         <span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
         <input type="text" id="username" name="username" class="form-control" placeholder="Username" autocomplete="off" autofocus="on" required>
         </div>
        <div class="input-group" style="margin-top: 5px;">
         <span class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></span>
         <input type="password" id="password" name="password" class="form-control" placeholder="Password" autocomplete="off" required>
         </div>
        <br />
        <button class="btn btn-lg btn-primary btn-block" name="submit" type="submit">Sign in</button>
      </form>

    </div> 
    <script src="js/ie10-viewport-bug-workaround.js"></script>
  </body>
</html>

<?php 
try {
    require_once "nusoap-0.9.5/lib/nusoap.php";
    $client = new soapclient("http://localhost/perpusweb/login_server.php?wsdl");
    if (isset($_POST['submit'])) {
        $response = $client->loginService($_POST['username'], $_POST['password']);
        echo "{$response}";
    }
} catch (SoapFault $e) {
    echo $e->getMessage();
}