php - 注意消息：未定义索引：模式文件：/includes/pages/game/class.ShowBonusPage.php

Question

我收到以下错误消息：

通知消息：未定义索引：模式文件：/includes/pages/game/class.ShowBonusPage.php 行：14 URL：localhost/2moons/game.php?page=bonus PHP-版本：5.2.6

代码是：

class ShowBonusPage extends AbstractPage {

function ShowBonusPage() {
global $USER, $PLANET, $LNG, $LANG, $db, $ressoucre, $reslist;
$PlanetRess = new ResourceUpdate();
$PlanetRess->CalcResource();
$PlanetRess->SavePlanetToDB();

$template    = new template();
$Mode = $_GET['mode'];
$darkmatter = $USER['darkmatter'];
$tecno = $USER['b_tech_planet'];
$minas = $PLANET['b_building_id'];
$buster = $PLANET['buster_tech'];
$metal = $PLANET['metal'];
$crystal = $PLANET['crystal'];
$deuterium = $PLANET['deuterium'];

错误行是：

    $Mode = $_GET['mode'];

谁能帮我这个

Answer 1

您应该以这种方式使用 GET 和 POST：

$Mode='';
if(isset($_GET['mode'])){
    $Mode = $_GET['mode'];
}