<?php
include "Functions.php";

if (array_key_exists('login_submit', $_POST)) {
    $filepath = "./user_data.dat";
    $Master_user_array = arrayfile_to_array($filepath);

    if (array_key_exists(strtolower($_POST['log_username']), $Master_user_array)) {

        if ($_POST['log_password'] == $Master_user_array[strtolower($_POST['log_username'])]['password']) {
            echo "{$_POST['log_username']} logged in.";
            die;
        } else {
            echo 'wrong password, try again';
        }
    }
    else {
        print "User {$_POST['username']} not found. <br>";
    }
}

if (array_key_exists('create_new_user', $_POST)) {
    header("Location: Create_New_User.php");
    exit;

}
?>
<form action = '<?php echo $_SERVER['PHP_SELF'] ?>' method= 'post'>
    Username: <br>
    <INPUT TYPE="TEXT"  name="log_username" value = "<?php if (isset($_POST['username'])) echo $_POST['username'] ?>"><br>
    Password: <br>
    <INPUT TYPE="password" name = 'log_password'><br><br>
    <INPUT TYPE="SUBMIT" name = 'login_submit' value="Login">
    <br>
    <INPUT TYPE="SUBMIT" name = 'create_new_user' value="Create New User">
</form>