mysql pdo数据库连接

MYSQL
$conn = @mysql_connect('localhost','root','root');//括号的里的分别代表主机、用户名、密码
mysql_select_db('test',$conn);//选择库

mysql_query('set names gbk',$conn);//设置字符集

$sql ="select * from news ";

$result = mysql_query($sql,$conn);

PDO
$dsn = "mysql:host=127.0.0.1;dbname=test";

$db = new PDO($dsn, 'root', 'root');
$rs = $db->query("SELECT * FROM save");
$result_arr = $rs->fetchAll();