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<?php
/////////////////////////////////////////////////////////
session_start();
require 'functions.php';
/////////////////////////////////////////////////////////
if ( isset($_COOKIE['key']) && isset($_COOKIE['idsc'] ) ) {
$id = $_COOKIE['key'];
$user = $_COOKIE['idsc'];

$result = mysqli_query($conn, "SELECT username FROM users WHERE id = $id");
$row = mysqli_fetch_assoc($result);

//////
if ( $user === hash('sha256' , $row['username']) ) {
$_SESSION['login'] = true;

}
}
/////////////////////////////////////////////////////////
if ( isset($_SESSION['login'])) {
header("Location: homepage.php");
exit(0);
}
/////////////////////////////////////////////////////////
if ( isset($_POST["login"]) ) {
$username = $_POST["username"];
$password = $_POST["password"];

$result = mysqli_query($conn, "SELECT * FROM users WHERE username = '$username'");
//////
if ( mysqli_num_rows($result) === 1){

$row = mysqli_fetch_assoc($result);
//////
if( password_verify($password , $row["password"] ) ){

$_SESSION["login"] = true;
//////
if ( isset($_POST['remember'])) {

setcookie('key' , $row['id'], time()+60);
setcookie('idsc' ,hash(sha256, $row['username']),time()+60);
}
header("Location: homepage.php");
exit(0);
}
}

$error = true;

}
/////////////////////////////////////////////////////////
?>
<!DOCTYPE html>
<html>
<head>
<title></title>
<link rel="stylesheet" href="login.css">
</head>
<body>
<div class="logo"><img src="" alt="" id=""></div>
<div class="loginform">
<form action="" method="POST">
<label for="username" id="user">Username : </label><input id="username" type="text" name="username" autofocus="true" required>
<label for="password" id="pass">Password : </label><input id="password" type="password" placeholder="***********" name="password" required>
<button type="submit" name="login" class="login">Login</button>
<div id="remember">
<input type="checkbox" name="remember"> <label for="remember">remember me </label>
</div>
</form>
<div class="invite">Do you have the account? if don't , <a href="register.php">Register Here</a></div>
</div>
<?php
if( isset($error) ) :
?>
<?php endif; ?>
</body>
</html>