<?php 
$dbh = new PDO('mysql:host=localhost;dbname=access_control', 'root', '');  
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);  
$dbh->exec('set names utf8');  
/*添加*/ 
//$sql = "INSERT INTO `user` SET `login`=:login AND `password`=:password";  
$sql = "INSERT INTO `user` (`login` ,`password`)VALUES (:login, :password)"; $stmt = $dbh->prepare($sql); $stmt->execute(array(':login'=>'kevin2',':password'=>''));  
echo $dbh->lastinsertid();  
/*修改*/ 
$sql = "UPDATE `user` SET `password`=:password WHERE `user_id`=:userId";  
$stmt = $dbh->prepare($sql);  
$stmt->execute(array(':userId'=>'7', ':password'=>'4607e782c4d86fd5364d7e4508bb10d9'));  
echo $stmt->rowCount();  
/*删除*/ 
$sql = "DELETE FROM `user` WHERE `login` LIKE 'kevin_'"; //kevin%  
$stmt = $dbh->prepare($sql);  
$stmt->execute();  
echo $stmt->rowCount();  
/*查询*/ 
$login = 'kevin%';  
$sql = "SELECT * FROM `user` WHERE `login` LIKE :login";  
$stmt = $dbh->prepare($sql);  
$stmt->execute(array(':login'=>$login));  
while($row = $stmt->fetch(PDO::FETCH_ASSOC)){    
 print_r($row);  
}  
print_r( $stmt->fetchAll(PDO::FETCH_ASSOC));  
?>