how to solve undefined variable error in php

Notice: Use of undefined constant ALL_PS-assumed 'all _ Ps' in E: \ Server \ vhosts \ www.lvtao.net \ global. php on line 50Notice: Undefined index: EaseTemplateVer in E: \ Server \ vhosts \ www.lvtao.net \ libs \ template. core. php on line

Notice: Use of undefined constant ALL_PS-assumed 'all _ Ps' in E: \ Server \ vhosts \ www.lvtao.net \ global. php on line 50 Notice: Undefined index: EaseTemplateVer in E: \ Server \ vhosts \ www.lvtao.net \ libs \ template. core. php on line

When debugging the program, there may be undefined variable error, in general, PHP does not need to define variables, but if the server error, there will be errors, we often receive form post data times undefined index error is as follows : $act

PHP prompts how to solve the undefined index (multiple methods), undefinedindex I. Related Information When you use $ _ post [''] or $ _ get [''] to obtain parameters in a form, the following error occurs: Notice: Undefined index :--------; And the

Notice: Use of undefined constant all_ps-assumed 'all _ Ps' in E:/Server/vhosts/www.lvtao.net/global.php on line 50 Notice: Undefined index: easetemplatever in E:/Server/vhosts/www.lvtao.net/libs/template.core.php on line 51 Notice: Use of undefined

In javascript, how does one determine whether a variable is null, undefined, Or NaN? Let's take a look at the specific judgment method. It is mainly determined through the typeof method. typeof returns a string and has six possible results: "number",

I. Related information Usually use $_post['] or $_get['] to get the parameters in the form will appear notice:undefined index:--------; And we often receive form post data times undefined index error For example: $act =$_post[' action ']; Using

The system prompts the undefined variable about the code of the course to be deselected. After the course is rejected and submitted, the system prompts an error. lines 15th, 35, and 38 have undefined variable "xuehao". how can I modify it?

Compiling the source package requires./configure then compile a. so fileOne less error packetInstall packageNormal displayThe LS directory has a./configure fileQuerying module LocationsEditing a configuration fileEditing a configuration fileIncrease

A large number of similar prompts will appear on the website, but they can be displayed and run normally.A simple line of code like the following will produce the above error:$ Str = coderbolg;Although this can be run sometimes, problems may occur