PDO的自带的获取自增id

$pdo = new PDO('MySQL:dbname=test;host=localhost;','root','');

$pdo->setAttribute(PDO::ATTR_PERSISTENT,true);

$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$pdo->exec("INSERT INTO testtable (custname) values ('insert1')");

.

echo'Last insert id is ' . $pdo->lastInsertId();?>