Cannot execute a PDO statement (update a MySQL table) when everything else in PDO works

Question

This is my first question on StackOverflow, can you please explain to me what I am doing wrong from: I have this code (below) but for some reason, that I have tried to look into and debug, I cannot see why PDO is not completing the request below, it works fine the same way for inserting and echoing, can someone please tell me what's going on? I am pulling my hair out of my head in frustration.

    $q = "UPDATE content SET urlid=:url, title=:title, description=:desc, keywords=:key     WHERE urlid=:urlid";
    $query = $pdo->prepare($q);
    $query->execute(array(
        ':url'     => $urlid,
        ':title'   => $title,
        ':desc'    => $desc,
        ':key'     => $key,
        ':contloc' => $contloc,
        ':userid'  => $uid,
        ':urlid'   => $urlid
        //':content' => $content
    ));

I receive the following warning in my Apache error log:

[Thu Jul 12 21:07:13 2012] [error] [client 99.230.122.54] PHP Warning: PDOStatement::execute(): SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in /Library/Server/Web/Data/Sites/Default/addto2.php on line 31, referer: http://localhost/sample/4fff30aea1f20

Answer 1

$q = "UPDATE content SET urlid=:url, title=:title, description=:desc, keywords=:key WHERE urlid=:urlid";
$query = $pdo->prepare($q);
$query->execute(array(
    ':url'     => $urlid,
    ':title'   => $title,
    ':desc'    => $desc,
    ':key'     => $key,
    ':urlid'   => $urlid
));

PDO complains because you are passing more arguments than you are using in your query. Or perhaps you meant to include more arguments in your query and you forgot?