Question

I’m trying to update my database entries with this form:

<form method="post" action="inc/update.php">
    <?php foreach ($links as $row) {
        ?>
        <div class="btn_admin">
            <p>
                <label>Titulo</label>
                <input type="text" name="title[]" value="<?php echo $row["desc"] ?>">
            </p>
            <p>
                <label>Url</label>
                <input type="text" name="url[]" value="<?php echo $row["url"] ?>">
                <input type="hidden" name="id[]" value="<?php echo $row["id"] ?>" />
            </p>

        </div>
    <?php }
    ?>
    <input type="submit" name="submit" value="Update Links" />
</form>

On my update.php file:

if ($_SERVER["REQUEST_METHOD"] == "POST"
        && $_POST["submit"] == "Update Links") {

    include_once 'db.php';
    $db = new PDO(DB_INFO, DB_USER, DB_PASS);

    foreach($_POST['id'] as $id ) {

    $title=$_POST["title"][$id-1];
    $url=$_POST["url"][$id-1];

    $sql = "UPATE index_links
                SET desc=?, url=?
                WHERE id=?";
    $stmt = $db->prepare($sql);
    $stmt->execute(array($title, $url, $id-1));
    $stmt->closeCursor();
    }
}

I’ve looped through $title and $url and everything is being ‘grabbed’ correctly, but the query is failing somehow with no errors.

I have even tried messing with erroneous query syntax (like in the query in the example above – “UPATE”), no errors whatsoever… and yes, the foreach loop is being accessed.

This seems like such intro level stuff, but I’m looking at this for an hour or so no and mind=blown… there are other queries (not UPDATE ones) on my project which are working fine.

Answer 1

In your case, the query probably fails because desc is a reserved word in mySQL.

PDO can be very secretive about its error messages by default. See this question on how to change that.