php - Mysqli to PDO conversion

I recently started using PDO a few days ago and am changing all my mysqli code but I seem to have hit a brick wall. Now this code worked beautifully when I was using mysqli, but now I can't seem to print out the result. This code basically takes the input value of password, and that of the hashed password in the database, matches them and if both are equal then the user will be logged in. My problem is that I can't seem to find a way to get the password from my database. Any help would be much appreciated. Thank you.

<?php 
 session_start();

 $user = "root";
 $pass = "";

$mcon = new PDO('mysql:host=localhost;dbname=rabbit_users', $user, $pass);

 try {
 $mcon = new PDO('mysql:host=localhost;dbname=rabbit_users', $user, $pass);
$mcon->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();



//prepare statement
$password = $_POST['password']; 

$stmt = $mcon->prepare("SELECT `password` FROM members WHERE password=:password");
$stmt->bindParam(":password", $_POST['password']);
$stmt->execute();

//get_result
$data_array = $stmt->fetchAll();
$stmt->fetch(PDO::FETCH_ASSOC);

//echo passwords
print 'Password from form: ' . $password . '<br />';
print 'Password from DB: ' . $data_array['password'] . '<br />';

//verify password
if (password_verify($password, $data_array['password'])) {
    print 'success';
    exit();
}else{
    print 'Try again m9';
    exit();
}
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