PDO操做MySQL 执行写操做与读操做

<?php   header('content-type:text/html;charset=utf-8');   //PDO操做MySQL   //1)链接认证   $pdo=new PDO("mysql:host=localhost;port=3306;dbname=test","root","root");   //2)执行写操做     //增长$sql="insert into demo

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