Untitled

<?php
 if(isset($_POST['submit'])) {
    $connection = mysqli_connect('localhost', 'root', 'root', 'uptest');

    $url = $_POST['url'];
    $query = "INSERT INTO urls(url)";
    $query .= "VALUES ('$url')";

    $result = mysqli_query($connection, $query);
    if(!$result){
        die(mysqli_error());
    }
 }
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <form action="index.php" method="POST">
    <input type="text" name="url" placeholder="Indtast URL">
    <input type="submit" value="submit">
    </form>
</body>
</html>