Home Backend Development PHP Tutorial 出错:Use of undefined constant allowhtml 与Undefined index

出错:Use of undefined constant allowhtml 与Undefined index

Jun 13, 2016 pm 12:26 PM
nbsp notice undefined

报错:Use of undefined constant allowhtml 与Undefined index
运行程序报如下错误,这是哪里出问题了?
Notice: Use of undefined constant allowhtml - assumed 'allowhtml' in /home/wwwroot/kaimen360_com/public_html/uc_client/model/base.php on line 69

Notice: Undefined index: allowhtml in /home/wwwroot/kaimen360_com/public_html/uc_client/model/base.php on line 69
------解决思路----------------------
使用了未经定义(不存在)的关联键
错误信息已给出的出错位置 /home/wwwroot/kaimen360_com/public_html/uc_client/model/base.php on line 69
麻烦你自己看一下
------解决思路----------------------
提示你,在数组中没有那个键名(不存在)为 allowhtml 的数据
------解决思路----------------------
数组中allowhtml的键值不存在而被使用了。
例如:

<br /><?php<br />$arr = array('a'=>123);<br />echo $arr['allowhtml'];  // 这样就会有提示未定义了。<br />?><br />
Copy after login
Copy after login

------解决思路----------------------
$a = array();
echo $a[allowhtml];

关联键名没有用引号括起(不是字符串),php 会先检查是否为常量,由于没有定义,所以有
Notice: Use of undefined constant allowhtml - assumed 'allowhtml' in ...

然后按字符串检查数组中是否有同名项,因为没有,所以有
Notice: Undefined index: allowhtml in ...

这是因为你没有书写健壮的代码造成的

php.ini 中默认 error_reporting = E_ALL
你可改为 error_reporting = E_ALL ^ E_NOTICE
或在程序开始处执行 error_reporting(E_ALL ^ E_NOTICE);
来补偿你的过失


------解决思路----------------------
引用:
Quote: 引用:

数组中allowhtml的键值不存在而被使用了。
例如:
<br /><?php<br />$arr = array('a'=>123);<br />echo $arr['allowhtml'];  // 这样就会有提示未定义了。<br />?><br />
Copy after login
Copy after login



怎么解决呀?
我迁移了服务器就报这样的错误,没有迁移服务器前好好的,这是为什么?


那是因为你的旧服务器设置了不输出notice,warning的错误,所以不显示。
你可以在程序顶加上
error_reporting(E_ALL^E_NOTICE^E_WARNING);
<br /><?php<br />error_reporting(E_ALL^E_NOTICE^E_WARNING); // 加了这句就可以屏蔽警告与提示的错误。<br />$arr = array('a'=>123);<br />echo $arr['allowhtml']; // 这里不会出现notice<br />?><br />
Copy after login

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Solution: Your organization requires you to change your PIN Solution: Your organization requires you to change your PIN Oct 04, 2023 pm 05:45 PM

The message "Your organization has asked you to change your PIN" will appear on the login screen. This happens when the PIN expiration limit is reached on a computer using organization-based account settings, where they have control over personal devices. However, if you set up Windows using a personal account, the error message should ideally not appear. Although this is not always the case. Most users who encounter errors report using their personal accounts. Why does my organization ask me to change my PIN on Windows 11? It's possible that your account is associated with an organization, and your primary approach should be to verify this. Contacting your domain administrator can help! Additionally, misconfigured local policy settings or incorrect registry keys can cause errors. Right now

How to adjust window border settings on Windows 11: Change color and size How to adjust window border settings on Windows 11: Change color and size Sep 22, 2023 am 11:37 AM

Windows 11 brings fresh and elegant design to the forefront; the modern interface allows you to personalize and change the finest details, such as window borders. In this guide, we'll discuss step-by-step instructions to help you create an environment that reflects your style in the Windows operating system. How to change window border settings? Press + to open the Settings app. WindowsI go to Personalization and click Color Settings. Color Change Window Borders Settings Window 11" Width="643" Height="500" > Find the Show accent color on title bar and window borders option, and toggle the switch next to it. To display accent colors on the Start menu and taskbar To display the theme color on the Start menu and taskbar, turn on Show theme on the Start menu and taskbar

How to change title bar color on Windows 11? How to change title bar color on Windows 11? Sep 14, 2023 pm 03:33 PM

By default, the title bar color on Windows 11 depends on the dark/light theme you choose. However, you can change it to any color you want. In this guide, we'll discuss step-by-step instructions for three ways to change it and personalize your desktop experience to make it visually appealing. Is it possible to change the title bar color of active and inactive windows? Yes, you can change the title bar color of active windows using the Settings app, or you can change the title bar color of inactive windows using Registry Editor. To learn these steps, go to the next section. How to change title bar color in Windows 11? 1. Using the Settings app press + to open the settings window. WindowsI go to "Personalization" and then

OOBELANGUAGE Error Problems in Windows 11/10 Repair OOBELANGUAGE Error Problems in Windows 11/10 Repair Jul 16, 2023 pm 03:29 PM

Do you see "A problem occurred" along with the "OOBELANGUAGE" statement on the Windows Installer page? The installation of Windows sometimes stops due to such errors. OOBE means out-of-the-box experience. As the error message indicates, this is an issue related to OOBE language selection. There is nothing to worry about, you can solve this problem with nifty registry editing from the OOBE screen itself. Quick Fix – 1. Click the “Retry” button at the bottom of the OOBE app. This will continue the process without further hiccups. 2. Use the power button to force shut down the system. After the system restarts, OOBE should continue. 3. Disconnect the system from the Internet. Complete all aspects of OOBE in offline mode

How to enable or disable taskbar thumbnail previews on Windows 11 How to enable or disable taskbar thumbnail previews on Windows 11 Sep 15, 2023 pm 03:57 PM

Taskbar thumbnails can be fun, but they can also be distracting or annoying. Considering how often you hover over this area, you may have inadvertently closed important windows a few times. Another disadvantage is that it uses more system resources, so if you've been looking for a way to be more resource efficient, we'll show you how to disable it. However, if your hardware specs can handle it and you like the preview, you can enable it. How to enable taskbar thumbnail preview in Windows 11? 1. Using the Settings app tap the key and click Settings. Windows click System and select About. Click Advanced system settings. Navigate to the Advanced tab and select Settings under Performance. Select "Visual Effects"

Display scaling guide on Windows 11 Display scaling guide on Windows 11 Sep 19, 2023 pm 06:45 PM

We all have different preferences when it comes to display scaling on Windows 11. Some people like big icons, some like small icons. However, we all agree that having the right scaling is important. Poor font scaling or over-scaling of images can be a real productivity killer when working, so you need to know how to customize it to get the most out of your system's capabilities. Advantages of Custom Zoom: This is a useful feature for people who have difficulty reading text on the screen. It helps you see more on the screen at one time. You can create custom extension profiles that apply only to certain monitors and applications. Can help improve the performance of low-end hardware. It gives you more control over what's on your screen. How to use Windows 11

10 Ways to Adjust Brightness on Windows 11 10 Ways to Adjust Brightness on Windows 11 Dec 18, 2023 pm 02:21 PM

Screen brightness is an integral part of using modern computing devices, especially when you look at the screen for long periods of time. It helps you reduce eye strain, improve legibility, and view content easily and efficiently. However, depending on your settings, it can sometimes be difficult to manage brightness, especially on Windows 11 with the new UI changes. If you're having trouble adjusting brightness, here are all the ways to manage brightness on Windows 11. How to Change Brightness on Windows 11 [10 Ways Explained] Single monitor users can use the following methods to adjust brightness on Windows 11. This includes desktop systems using a single monitor as well as laptops. let's start. Method 1: Use the Action Center The Action Center is accessible

How to Fix Activation Error Code 0xc004f069 in Windows Server How to Fix Activation Error Code 0xc004f069 in Windows Server Jul 22, 2023 am 09:49 AM

The activation process on Windows sometimes takes a sudden turn to display an error message containing this error code 0xc004f069. Although the activation process is online, some older systems running Windows Server may experience this issue. Go through these initial checks, and if they don't help you activate your system, jump to the main solution to resolve the issue. Workaround – close the error message and activation window. Then restart the computer. Retry the Windows activation process from scratch again. Fix 1 – Activate from Terminal Activate Windows Server Edition system from cmd terminal. Stage – 1 Check Windows Server Version You have to check which type of W you are using

See all articles