php使用PDO操作MySQL数据库实例

extension=php_pdo.dll

extension=php_pdo_mysql.dll

header("content-type:text/html;charset=utf-8");
$dsn="mysql:dbname=test;host=localhost";
$db_user='root';
$db_pass='admin';
try{
 $pdo=new PDO($dsn,$db_user,$db_pass);
}catch(PDOException $e){
 echo '数据库连接失败'.$e->getMessage();
}
//新增
$sql="insert into buyer (username,password,email) values ('ff','123456','admin@admin.')";
$res=$pdo->exec($sql);
echo '影响行数'.$res;
 
//修改
$sql="update buyer set username='ff123' where id>3";
$res=$pdo->exec($sql);
echo '影响行数'.$res;
//查询
$sql="select from buyer";
$res=$pdo->query($sql);
foreach($res as $row){
 echo $row['username'].'<br/>';
}
//删除
$sql="delete from buyer where id>5";
$res=$pdo->exec($sql);
echo '影响行数'.$res;