<?php
new pdo("mysql:host=localhost;dbname=数据库名字","数据库用户名","密码"); 
//链接数据库
//数据更新
$sql  = "UPDATE `栏目表` SET `栏目表名`=:name WHERE `id`=:id";
$stmt = $pdo->prepare($sql);
$stmt->execute(array(':name' => '站长吧', ':id' => 2));
echo $stmt->rowCount();
?>