php mysql PDO基本操作

<?php   $dbh = new PDO(\'mysql:host=localhost;dbname=localhost\', \'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\'=>\'admin1\',\':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 \'admin_\'"; //admin%   $stmt = $dbh->prepare($sql);   $stmt->execute();   echo $stmt->rowCount(); /*查询*/   $login = \'admin%\';   $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)); ?>

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