Warning: PDOStatement::execute(): SQLSTATE[HY093]: Invalid parameter number

问题

Im having an error with select statment using pdo, and Im not understanding the reason why this is happening.

Do you see something wrong here?

I'm having this error:

Warning: PDOStatement::execute(): SQLSTATE[HY093]: Invalid parameter number: parameter was not defined in $readGallery->execute();

$delId = $_GET['delid'];
$thumb = $_GET['thumb'];
$folder = '../uploads/';
$readGallery = $pdo->prepare("SELECT * FROM gallery WHERE news_id = ?");
$readGallery->bindParam(':news_id', $delId);
$readGallery->execute();
$numGallery =   $readGallery->rowCount();

回答1:

change

$readGallery = $pdo->prepare("SELECT * FROM gallery WHERE news_id = ?");

to

$readGallery = $pdo->prepare("SELECT * FROM gallery WHERE news_id = :news_id");

来源：https://stackoverflow.com/questions/22919861/warning-pdostatementexecute-sqlstatehy093-invalid-parameter-number