从表中获取PDO lastInsertId（）

Is it possible to get lastInsertId() from a method, and also if possible get the value from a specific table?

The method I try to use is in my db.class.php

public function getLastID(){ 
 $dbh = $this->db_connect(); 
 if($dbh){ 
  try{
   $lastId = $dbh->lastInsertId(); 
   return $lastId; 
  } 
  catch(PDOException $err){
   return $err->getMessage(); 
  } 
 } 
 else{ 
  return false; 
 } 
}

When I access the method, echo $db->getLastID();, the value I get is 0.

return $db->lastInsertId('column');

OR

$db->getDbh()->lastInsertId();

stackoverflow.com/questions/10809752/how-to-use-pdolastinsertid