PHP中PDO如何操作MySQL详解

extension=php_pdo.dll

extension=php_pdo_mysql.dll

DROP TABLE IF EXISTS `test`;
CREATE TABLE `test` (
`id` int(10) NOT NULL DEFAULT '0',
`user` char(20) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `idx_age` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

<?php
header("content-type:text/html;charset=utf-8");
$dsn="mysql:dbname=test;host=localhost";
$db_user=&#39;root&#39;;
$db_pass=&#39;admin123&#39;;
try{
$pdo=new PDO($dsn,$db_user,$db_pass);
}catch(PDOException $e){
echo &#39;数据库连接失败&#39;.$e->getMessage();
}
//新增
$sql="insert into test (id,user) values (1,&#39;phpthinking&#39;)";
$res=$pdo->exec($sql);
echo &#39;影响行数：&#39;.$res;
//修改
$sql="update test set user=&#39;phpthinking&#39; where id=1";
$res=$pdo->exec($sql);
echo &#39;影响行数：&#39;.$res;
//查询
$sql="select * from test";
$res=$pdo->query($sql);
foreach($res as $row){
echo $row[&#39;user&#39;].&#39;<br/>&#39;;
}
//删除
$sql="delete from test where id=1";
$res=$pdo->exec($sql);
echo &#39;影响行数：&#39;.$res;