<?php
header("Content-type: text/html; charset=gb2312");

$conn=@mysql_connect("localhost","root","");
mysql_query("set names gb2312");
mysql_select_db("news");

$sql="";
$stmt=mysql_query($sql);

var_dump($stmt);

echo "<br>------------------------------------------------------<br>";

$cons=new mysqli("localhost","root","","news");
$cons->query("set names gb2312");

$stmk=$cons->query($sql);
var_dump($stmk);

echo "<br>------------------------------------------------------<br>";
$pdo=new pdo("mysql:host=localhost;dbname=news;","root","");
$pdo->query("set names gb2312");

$stmx=$pdo->query($sql);

//$rk1=$stmx->fetch(MYSQL_ASSOC);
//var_dump($rk1);

$rk2=$stmx->fetchAll(PDO::FETCH_ASSOC);
var_dump($rk2);
?>