login.php

<?php

include("dbh.php");

$email = $_POST["email"];
$password = $_POST["password"];

$sql = "SELECT * FROM users WHERE email='$email' AND password='$password'";
$results = $conn->query($sql);


if(!$row = mysqli_fetch_assoc($result)){ 
    echo "Your username or password is incorrect."; 
}else{ 
    echo "You are logged in."; 
}

?>