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


im having error select statment using pdo, , im not understanding reason why happening.

do see wrong here?

i'm having error:

warning: pdostatement::execute(): sqlstate[hy093]: invalid parameter number: parameter not defined in $readgallery->execute();

$delid = $_get['delid']; $thumb = $_get['thumb']; $folder = '../uploads/'; $readgallery = $pdo->prepare("select * gallery news_id = ?"); $readgallery->bindparam(':news_id', $delid); $readgallery->execute(); $numgallery =   $readgallery->rowcount();

change 

$readgallery = $pdo->prepare("select * gallery news_id = ?");

to 

$readgallery = $pdo->prepare("select * gallery news_id = :news_id");

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