PHP not able to access POST values - php

Question

I have a HTML login form that is processed and displayed to the user by PHP if they are not logged in. This form is set to POST to /user.php which in turn accesses my authentication class, and either creates a session and returns true or false and does not log the user in.
My problem is that whatever I try, the HTML form simply will not POST values to the PHP processing part.
This is my current source code:
Log in form:
<div class="panel-body">
<!-- BEGIN ifLogInError -->
<div class="alert alert-danger">
<p>Either your username or password was incorrect. Please try again. Forgotten your password?</p>
</div>
<!-- END ifLogInError -->
<form class="form-horizontal" method="post" action="{ROOT}/user.php">
<div class="form-group">
<label for="username" class="col-sm-2 control-label">Username</label>
<div class="col-sm-10">
<input type="text" class="form-control" id="username" value="" placeholder="Your username">
</div>
</div>
<div class="form-group">
<label for="password" class="col-sm-2 control-label">Password</label>
<div class="col-sm-10">
<input type="password" class="form-control" id="password" value="" placeholder="Your password">
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<input type="submit" class="btn btn-default" value="Sign in" />
</div>
</div>
</form>
</div>
User.php (as it currently stands):
echo "<pre>";
var_dump($_POST);
var_dump(file_get_contents("php://input"));
echo "</pre>";
phpinfo();
Both var_dumps return the following, suggesting the form is not POSTing:
array(0) {
}
string(0) ""
What am I doing wrong here?

Answer 1

You haven't given your <input>s a name attribute.

Answer 2

Needs <input name="myname">
Then in the output file put $_POST['myname']