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Based on the comments on my previous question, took some tutorials on how to avoid injections on query. Does the code below prevents against it in any way.? Secondly, can you recommend a good article that writes well in how to secure input data by users. Please be kind with your comments.😉😉. Thankks in advance. The code works fine. <?php include 'db.php'; error_reporting(E_ALL | E_WARNING | E_NOTICE); ini_set('display_errors', TRUE); if(isset($_POST['submit'])) { $username = $_POST['username']; $password = ($_POST['password']); $sql = "SELECT * FROM customer WHERE username = ?"; $stmt = $connection->prepare($sql); $stmt->bind_param('s', $username); $stmt->execute(); $result = $stmt->get_result(); $count = $result->num_rows; if($count == 1) { while ($row = $result->fetch_assoc()) { if ($row['status'] == 'blocked') { echo'your account is suspended' session_destroy(); exit(); } else if($row['status'] == 'active') { if($username !== $row['username']) { echo '<script>swal.fire("ERROR!!", " Username is not correct. Check Again", "error");</script>'; } if($password !== $row['password']) { echo'<script>swal.fire("ERROR!!!", "Your Password is Incorrect. Check Again.", "error");</script>'; } if($username == $row['username'] && $password == $row['password']) { header('Location:cpanel/'); else { } }//if count }//while loop }//submit ?>