<?php

function db_now()
{
    return date('Y-m-d H:i:s');
}

$username = $_POST['username'];
$password = $_POST['password'];
$errors = array();
$passcheck = $db->single("SELECT password FROM users WHERE username='".$username."'");
$hash = sha1($username, $password);
$user = $db->single("dsfsdfdsf");

print_r($user);

if(!empty($_POST))
{

    if(strlen($username) < 1)
    {
        $errors[] = 'Username too short, at least 1 character';
    }
    if(strlen($password) < 4)
    {
        $errors[] = 'Password too short, at least 4 characters';
    }
    if($db->single("SELECT username FROM users WHERE username='".$username."'") == null)
    {
        $errors[] = 'Username does not exist';
    }
    if($passcheck['password'] == $hash)
    {
        echo 'Goed wachtwoord';
    }

    if(!empty($errors))
    {
        echo '<fieldset>';
        echo '<legend>Error\'s</legend>';
        echo '<div class="side-img">';
        echo '<img src="images/error.png" alt="Error">';
        echo '</div><div class="content">';
        foreach ($errors as $error)
        {
            echo '<span class="error">'.$error.'</span><br />';
        }
        echo '</fieldset>';
        echo '</div>';
    } else {
        echo '<fieldset>';
        echo '<legend>Succes!</legend>';
        echo '<div class="side-img">';
        echo '<img src="images/check.png" alt="Error">';
        echo '</div><div class="content">';
        echo '<span>You are succesfull logged in!</span>';
        echo '</fieldset>';
        echo '</div>';

    }
}
?><form action="?page=login" method="post">
<fieldset>
    <legend>Login</legend>
    <div class="side-img">
        <img src="images/keys.png" alt="Error">
    </div>
    <div class="content">
        <span>Username:</span><input type="text" name="username">
        <br />
        <span>Password:</span><input type="password" name="password">
        <br />
        <input type="submit" value="Login">
    </div>
</fieldset>
</form>