$login = "root";
$passwd = "mysql";
try{
  $db=new pdo('mysql:host=localhost;dbname=mysql',$login,$passwd);
  foreach($db->query('select * from test') as $row){
  print_r($row);
  }
  $db=null;
}catch(pdoexception $e){
  echo $e->getmessage();
}

$dbms='mysql'; //數(shù)據(jù)庫類型 oracle 用odi,對(duì)于開發(fā)者來說，使用不同的數(shù)據(jù)庫，只要改這個(gè)，不用記住那么多的函數(shù)了
$host='localhost'; //數(shù)據(jù)庫主機(jī)名
$dbname='test'; //使用的數(shù)據(jù)庫
$user='root'; //數(shù)據(jù)庫連接用戶名
$pass=''; //對(duì)應(yīng)的密碼
$dsn="$dbms:host=$host;dbname=$dbname"; 
class db extends pdo {   
 public function __construct(){        
 try {             
 parent::__construct("$globals[dsn]", $globals['user'], $globals['pass']);         
 } catch (pdoexception $e) {         
  die("error: " . $e->__tostring() . "<br/>");       
  }    
  }        
 public final function query($sql){        
 try {           
  return parent::query($this->setstring($sql));        
  }catch (pdoexception $e){            
  die("error: " . $e->__tostring() . "<br/>");       
   }
   }        
   private final function setstring($sql){        
   echo "我要處理一下$sql";        
   return $sql;    }}
   $db=new db();
   $db->setattribute(pdo::attr_case, pdo::case_upper);
   foreach ($db->query('select * from xxxx_menu') as $row) {    
   print_r($row);
   }
$db->exec('delete from `xxxx_menu` where mid=43');