SQL，PHP，预备语句

Question

I am trying to use a prepared statement to populate my table from PHP.

No errors are being thrown however, the data is not entering the table. Here is my code:

$stmt = $mysqli->prepare("INSERT INTO Parks VALUES (null,?,?,?,?,?,?,?,?,?,?,?,?,?,Now(),?,?,?, 0, 0, 0)");
    if ($stmt === FALSE) {
    die ("Mysql Error: " . $mysqli->error);
    }
    $stmt->bind_param('ssssssssssssssss', $name, $theme, $size, $mountains, $hills, $river, $lake, $island, $setofislands, $ocean, $waterfalls, $file, $image, $description, $author,$cs);

    $stmt->execute();
    $stmt->close();
    $mysqli->close();

Thanks in advance.

Data Types:

• ID (Int(autoincrement))
• Name (varchar(255))
• Theme (varchar(255))
• Size (varchar(255))
• Mountains (varchar(255))
• Hills (varchar(255))
• Rivers (varchar(255))
• Lake (varchar(255))
• Island (varchar(255))
• Setofislands (varchar(255))
• Ocean (varchar(255))
• Waterfall (varchar(255))
• File (varchar(255))
• Image (varchar(255))
• DateUploaded (date)
• Description(varchar(255))
• Author (varchar(255))
• CS(varchar(2000))
• Download(int(255))
• Rating(double)
• FileSize(BigInt(20)

(total 21)

Note: I have tried prepared statements on a test database, which just had one column and that worked...

Answer 1

After a series of trial and error I was able to resolve the issue.

It seemed that:

$stmt->bind_param('ssssssssssssssssi', etc
$stmt->exceute();

Was needed and that listing out the column names:

Insert into Parks (name, description) Values (?, ?)

were the changes needed to make it work. To confirm, it now all works, thanks for everyones support on this! :)