pdo返回数组

 <?php
$dsn='mysql:host=localhost;port=3306;dbname=test;charset=utf8';
$pdo=new PDO($dsn,'root','root');
$stmt=$pdo->query("select * from admin");
echo "<pre>";
//$rs=$stmt->fetchALL(PDO::FETCH_BOTH); //默认返回关联和索引
//$rs=$stmt->fetchALL(PDO::FETCH_NUM); //返回索引数组
//$rs=$stmt->fetchALL(PDO::FETCH_ASSOC); //返回关联数组
//echo $stmt->fetchColumn(2); 返回当前行的第三列
?>