注意：第3行C:\xampp\htdocs\gpt\includes.php中的未定义索引：username

当涉及到PHP和其他开发工具时，我是一个noob。不管怎样，从过去两天以来，我一直在努力寻找解决办法。我几乎到处找。因此，我试图使用XAMPP将设计集成到GPT脚本中，但每次尝试转到文件所在的localhost/GPT时，都会出现一系列错误。页面顶部显示以下内容：-

"; }}}} if(isset($_SESSION['username']) && isset($_SESSION['password'])){ header("Location: members.php"); } ?>
Notice: Undefined index: username in C:\xampp\htdocs\gpt\includes.php on line 3

Deprecated: mysql_query(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in C:\xampp\htdocs\gpt\includes.php on line 3

Warning: mysql_fetch_object(): supplied argument is not a valid MySQL result resource in C:\xampp\htdocs\gpt\includes.php on line 3

Notice: Trying to get property of non-object in C:\xampp\htdocs\gpt\includes.php on line 9

Notice: Trying to get property of non-object in C:\xampp\htdocs\gpt\includes.php on line 14

Notice: Trying to get property of non-object in C:\xampp\htdocs\gpt\includes.php on line 15

Notice: Trying to get property of non-object in C:\xampp\htdocs\gpt\includes.php on line 16

我尝试添加

错误报告（E_ALL^E_NOTICE）

到config.php和includes.php的顶部，然后错误减少为：-

"; }}}} if(isset($_SESSION['username']) && isset($_SESSION['password'])){ header("Location: members.php"); } ?>
Deprecated: mysql_query(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in C:\xampp\htdocs\gpt\includes.php on line 4

Warning: mysql_fetch_object(): supplied argument is not a valid MySQL result resource in C:\xampp\htdocs\gpt\includes.php on line 4

我还尝试添加了

session_start（）到每个页面。
无论如何，这些都是涉及到的页面：-

config.php

<?
session_start();ob_start();
$hostname = "localhost"; //your hostname (normally localhost)
$data_username = "root"; //database username
$data_password = ""; //database password
$data_basename = "gpt"; //database name
$conn = mysql_connect("".$hostname."","".$data_username."","".$data_password."");  
mysql_select_db("".$data_basename."") or die(mysql_error());  
$bonuspoints=10; //bonus points awarded for new users
$mainpointsneeded=200; //max number of points needed before user can request voucher
?>



includes.php

<?php 
error_reporting (E_ALL ^ E_NOTICE); 
session_start();
$fetch_users_data = mysql_fetch_object(mysql_query("SELECT * FROM `members` WHERE username='".$_SESSION['username']."'"));
$title= "My Voucher Geek";  //your site title
$yourdomain="http://localhost/gpt"; //your domain name where script is installed - do not use trailing slash
$tweetmsg="Get Amazon and ASOS gift vouchers for free at http://www.myvouchergeek.com"; //set text for tweet this button on homepage
$bonuspoints= 10;    //amount of bonus points to give to users
$refer_points=2; //amount of points a user receives if one of their referred users completes any survey
$ref_id=$fetch_users_data->id;
if(isset($_GET['join'])){
    $referral_ID = $_GET['join'];
    $referral_string= "?join=".$referral_ID;
}
$membername= $fetch_users_data->username; //don't change
$memberpoints=$fetch_users_data->points; //don't change
$membersurveys=$fetch_users_data->completed_surveys; //don't change
$earnedpoints = $memberpoints - $bonuspoints;//if you want to display how many points user has earned (as opposed to bonus points)
$mainpointsneeded = 200; //total points needed before user can request a voucher
$pointsneeded= $mainpointsneeded - $memberpoints; //points left before they can request voucher
$contactemail = "YOUR_EMAIL_ADDRESS"; //contact form messages will be sent here
$requestemail = "THE_SAME_OR_ANOTHER_EMAIL_ADDRESS"; //request a voucher messages will be sent here
?>

这些都是警告，所有的
mysql.*
函数都已弃用，您不应该再使用它们了。如果不想显示警告，则需要在使用这些功能之前移动错误报告设置。现在您有
错误报告（E_ALL ^E_通知）includes.php
顶部的code>是最后一个被调用的对象。您应该将其移动到
config.php
的顶部。此外，使用您现在的错误设置，您将显示除通知之外的所有错误，因此警告仍将显示。如果要隐藏警告和/或不推荐的错误条目，需要将其更改为：

error_reporting(E_ERROR);

您还应该更改这些行，您不需要引号：

//$conn = mysql_connect("".$hostname."","".$data_username."","".$data_password."");
//mysql_select_db("".$data_basename."") or die(mysql_error());
$conn = mysql_connect($hostname,$data_username,$data_password);
mysql_select_db($data_basename) or die(mysql_error());

而且现在你的脚本非常不安全<代码>$username
在发送到数据库之前不会被过滤

你还有其他地方有
$variable1=“”.$variable2。“
这些双引号你有一个一文不值的。你可以说
$variable=$variable2
在我看来，您的
short\u open\u标签已禁用，而我第一次尝试了该功能。没用。说清楚，去掉所有短标签
谢谢，先生。根据你的建议，一些问题已经解决了，比如我现在可以使用测试帐户登录。我是个笨蛋，请试着理解。你能告诉我如何解决“MySQL不推荐使用”的问题吗。因为这似乎是主要问题，谢谢你的评论。但是，我不想隐藏错误。实际上，我希望整个脚本在XAMPP上工作，因为它在上传到网站主机时工作。我在托管帐户上尝试过这个脚本，在那里效果很好。我对XAMPP没有太多经验。那么，如果我向某人提供脚本，他们能在theri XAMPP上检查并修复错误吗？如果不反对TOS，如果有人愿意帮忙，如果你想修复脚本，你首先要做的就是去掉所有的
mysql.*
函数。像
mysql\u connect
，
mysql\u select\u db
，
mysql\u query
，等等……还有什么可以替代它们，因为这些是脚本正常运行所必需的。我想问题暂时解决了。实际上，正如通知所说，我添加了“改用mysqli或PDO”
//$conn = mysql_connect("".$hostname."","".$data_username."","".$data_password."");
//mysql_select_db("".$data_basename."") or die(mysql_error());
$conn = mysql_connect($hostname,$data_username,$data_password);
mysql_select_db($data_basename) or die(mysql_error());