try {
$dbh = new PDO('sqlite:../wn.db','', '');
$query = "select * from sqlite_master;";
$stmt = $dbh->prepare($query);
$stmt->execute();
$cols = array();
while ($cols = $stmt->fetch(PDO_FETCH_ASSOC)) {
var_dump($cols);
}
} catch (PDOException $exception){
echo "MAKEING PDO:";
echo $exception->getMessage();
echo "\n";
exit();
}
にすればいいんじゃね？