Удаления файлов PHP

$('#js-remove').click(function(){ 
       let id =  $(this).attr('data-id'); 
        $.ajax({ 
            type: "POST", 
            url: 'remove.php', 
            data: {'id': id }, 
            dataType: "json", 
            cache: false, 
            success: function (respond) { 
                console.log('good'); 
                console.log(respond); 
             }, 
             error:function(respond){ 
                console.log('bad'); 
                console.log(respond); 
             } 
        }); 
    }); 
     
//PHP 
 
$connect_to_db = mysql_connect($db_host, $db_username, $db_password) 
or die("Could not connect: " . mysql_error()); 
 
mysql_select_db($db_name, $connect_to_db) 
or die("Could not select DB: " . mysql_error()); 
 
 $id = $_POST['id']; 
 
$rmfile = mysql_query("SELECT img1,img2,img3,img4,img5,img6,img7,img8 FROM cars WHERE id = '$id'")  
 
while ($row = mysql_fetch_assoc($rmfile)) { 
    foreach ($row as $key => $value) { 
        unlink('../img/uppcars/'.$value.'.jpg'); 
    } 
} 
$remove = mysql_query("DELETE FROM cars WHERE id = $id"); 
mysql_close($connect_to_db);

<button data-id="374esndas3had" id="js-remove">Delete</button>