Untitled

<html>

<head>

</head>

<body>

<form action="delete.php" method="post">
id: <input type="text" name="id">
<input type="submit" value="ok">
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "uni";

$conn = new mysqli("localhost","root","",'uni');
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "DELETE FROM student WHERE id=3";

if ($conn->query($sql) === TRUE) {
    echo "successful";
} else {
    echo "error: " . $conn->error;
}

$conn->close();
?>

</form>
</body>

</html>