borrarcoche.php

<?php
if ($_SERVER['REQUEST_METHOD'] === 'GET')
{
    if (isset($_GET['id']))
    {
        $servername = "localhost";
        $username = "root";
        $password = "";
        $conn = mysqli_connect($servername, $username, $password, "coche");
        $sql = "DELETE FROM `coche` WHERE  `id`=" . $_GET["id"] . ";";
        mysqli_query($conn, $sql);
        header('Location: '. "/listarcoches.php");
    }
}
?>