pdo 转utf8

$dsn = 'mysql:dbname=testdb;host=127.0.0.1';
$user = 'dbuser';
$password = 'dbpass';

try {
$db = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
echo 'Connection failed: ' . $e->getMessage();
}

"mysql:host=$host;dbname=$db;charset=utf8"

注意： 方法一在低版本php中不适应   php 5.3.6

$dbh = new PDO("mysql:$connstr",  $user, $password);
$dbh->exec("set names utf8");