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pdo 怎么获取总列数

$cols=mysql_num_fields($result);//总列数
$total=mysql_num_rows($result);//总条数

用pdo 怎么写


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SQL语句啊.COUNT()

try{
? ? ? ? $pdo = new PDO('mysql:dbname=test;host=localhost','root','');
? ? ? ? $pdo->exec('SET NAMES utf8 ');
? ? ? ? $stm = $pdo->query(' SELECT COUNT(*) FORM xxx ' );
? ? ? ? $data = $stmt->fetch( PDO::FETCH_NUM);
}catch(PDOException $e)
{
? ? die($e->getMessage());
}

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