Password access validation

[WarrenWalker]

This is the code in the html

<center>
  <form action='php/login.php' method='post' name='login'>
    <h1>Login</h1>
    <input type='email' name='user_email'>
    <input type='password' name='user_password'>
    <input type='submit' name='submit' value='Login'>
  </form>
</center>

This is the PHP to validate email and password

<?php

$user_page = "http://www.mysite.com/index.php?page=error404";

if ($_POST['wwalker@mysite.com'] != $user_email || $_POST['password'] != $user_password) { 
	$user_page == "http://www.mysite.com/index.php?page=loggedin";
}

header('Location: '.$user_page);
exit();

?>

What am i doing wrong, because it doesn't take the email and password across?
Is the validation code right?

[Rabbit]

None of your variables are populated. Plus one of your post indexes doesn't exist.