query("SELECT * FROM user WHERE username='$u' AND password='$p'")->fetch_assoc();
if($row){ $_SESSION['user_id']=$row['id']; $_SESSION['username']=$row['username']; echo "ok"; }else{ echo "密码错误"; }
exit;
}
if($_POST['act']=='reg'){
$u=$_POST['username']; $p=md5($_POST['password']);
$conn->query("INSERT INTO user (username,password) VALUES ('$u','$p')");
echo "ok"; exit;
}
?>
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