Trying to create Sign Up form using PHP - php

Question

I am trying to create a SignUp form for a web application I am developing and haven't programmed with mySQL in a while and when I fill out the HTML form I just get to a blank page (register.php) and no values are passed into the database table. The code, both HTML and PHP, are below. Any guidance as to what I'm missing or why this isn't passing through would be sincerely appreciated.
This is the HTML form to sign up:
<div class="panel-body">
Please fill out the form below.
<br>
<form action="register.php" method="post">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" name="email" placeholder="Enter email">
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1" name="password" placeholder="Password">
</div>
<button type="submit" class="btn btn-default">Sign Up</button>
</form>
And here is the code on register.php:
$user = "smartkrawldb";
$pass = "Nixon15!";
$db = new PDO( 'mysql:host=XX.XXX.XXX.XX,dbname=smartkrawldb, $user, $pass);
$form = $_POST;
$email = $form['email'];
$password = $form['password'];
$sql = "INSERT INTO users ( email, password) VALUES ( :email, :password)";
$query = $db->prepare( $sql );
$query->execute( array(':email'=>$email, ':password'=>$password));

Answer 1

Does it work if you try this instead?
$email = $_POST['email'];
$pass = $_POST['pass'];
$query = mysql_query("SELECT * FROM users WHERE email = '{$email}' AND password = '{$pass}';
I highly recommend you to switch over to PHP's PDO Object workflow instead, so much more secure and easy to work with.

Answer 2

$_POST['submit'] is passing no value (it'a submit button), at all.
try to var_dump, changing your last lines to this:
if(isset($_POST['submit'])) {
signUp();
}
else {
echo "the problem with post_submit is that is not here inside: ";
var_dump($_POST);
}
to get an idea of what is inside the $_POST superglobal.
cheers!