ragazzi questo script:
Codice PHP:
<?php

$mysql = new mysql('skizzo', '15421542', 'localost', 'my_skizzo.articles');
if(!$mysql)
{
    die("Errore di connessione al database, impossibile procedere");
}

if(isset($_POST['action']) and $_POST['action'] == 'insert')
{
    $mysql->query("INSERT INTO articles VALUES ('', '".$_POST['author']."', '".addslashes($_POST['title'])."', '".addslashes($_POST['article'])."')");
    header('Location: index.php');
}

$authors = $mysql->query("SELECT id, CONCAT(surname, ' ', name) AS fullname FROM authors ORDER BY surname ASC");
?>
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>Inserimento articolo</title>
    </head>
    <body>
        <ul>[*][url="News.php"]Lista articoli[/url][*][url="insert.php"]Inserisci un articolo[/url][/list]
        <h3>Inserisci un articolo</h3>
        <form action="" method="post">
            <input type="hidden" name="action" value="insert"/>
            <label>Autore:</label> <select name="author">
                <?php
                while($author = $authors->fetch_assoc())
                {
                    echo "<option value=".$author['id'].">".$author['fullname']."</option>";
                }
                ?>
            </select>

            <label>Titolo:</label> <input type="text" name="title" size="55"/>

            <label>Text:</label>

            <textarea name="article" rows="6" cols="60"></textarea>

            <input type="submit" value="Salva"/>
        </form>
    </body>
</html></div>
</div>
</body>
</html>
mi da questo errore:
Fatal error: Cannot instantiate non-existent class: mysql in /membri/sk1zzo/insert.php on line 182