<?php
$mysqli = new mysqli("localhost","root", "", "mybase" ) or die ('Невозможно открыть базу');
$mysqli->query ("SET NAMES 'utf8'");
$sql = "SELECT id,content FROM `auto` WHERE id = '".$_GET['id']."'";
$result = $mysqli->query($sql);
$row = $result->fetch_assoc();
?>
<?php echo $_GET['id']."<br>";
echo $row['content']."<br><br>";
$mysqli-> close();
?>