如何获取按列名索引的数组？

Question

I have this:

$pdo = new PDO("mysql:host=$host;dbname=$databaseName;charset=utf8", $user, $pass);
$query = "SELECT name FROM $tableName";
$stm = $pdo->prepare($query);
$stm->execute();
$array = $stm->fetchAll();
$firephp->log($array);
echo json_encode($array);

Result on ajax is:

[{"name":"mike","0":"mike"},{"name":"john","0":"john"},{"name":"tito","0":"tito"}]

But i want to get this:

{"name":[{"mike","john","tito"}]}

Which PDO fetch_style or what should i do in PHP to receive the string i want on jQuery?

Many thanks.

Answer 1

$array = $stm->fetchAll(PDO::FETCH_COLUMN, 0);
echo json_encode(array('name' => $array));