php_mysqli面向对象链接数据库（一）

<?php
$servername="localhost";
$username="root";
$password="root";
$dbname="empmanage";

$conn=new mysqli("$servername","$username","$password","$dbname");
if ($conn->connect_error) {
die("Connection failed");
}

$id=$_POST['id'];
$password=$_POST['password'];

$sql="select password,name from admin where id=$id";

$res=$conn->query($sql);

if($row=$res->fetch_row()){
if ($row['0']==$password){
$name=$row['1'];
echo $name;
header("Location:empManage.php?name=$name");
echo "jak";
exit();
}
}else {
header("Location:login.php?errno=1");
exit();
}

$res->free();
$conn->close();

?>