Solution to phpUndefinedindex and Undefinedvariable

$ Act $ _ POST [& amp; 39; act & amp; 39;]; the following code always prompts: Notice: Undefinedindex: actinF: windsflybookpostphponline18.

$ Act = $ _ POST ['AC']; the following code always prompts: Notice: Undefined index: act in F: windsflybookpost. php on line 18.

In addition, sometimes there are some such prompts as: Notice: Undefined variable: Submit...

Cause:Caused by undefined variables

Solution:

1) error_reporting settings: locate error_reporting = E_ALL and change it to error_reporting = E_ALL &~ E_NOTICE

2) register_globals settings: find register_globals = Off and change it to register_globals = On.

1. Notice: Undefined variable: email in D: PHP5ENOTEADDNOTE. PHP on line 9
2. Notice: Undefined variable: subject in D: PHP5ENOTEADDNOTE. PHP on line 9
3. Notice: Undefined variable: comment in D: PHP5ENOTEADDNOTE. PHP on line 9
4. ........

Php does not need to define variables, but what should I do in this case? In C: WINDOWS, find row 302 in php. ini and change error_reporting = E_ALL to error_reporting = E_ALL &~ E_NOTICE: restart apache2.2.

Solution: modify php. ini

Change error_reporting = E_ALL to error_reporting = E_ALL &~ E_NOTICE

If you do not want to display any errors, modify display_errors = Off.

If you do not have permission to modify php. ini, you can add ini_set ("error_reporting", "E_ALL &~ E_NOTICE ");