Php prompts Notice: Undefined index error solution

Source: Internet
Author: User

Cause analysis

This problem is generally caused by undefined variables.

Example

The code is as follows: Copy code

If ($)
{
Echo $;
}
Else
{

}

// Prompt: Notice: Undefined variable: a in E:/www/test. php on line 5

The code is as follows: Copy code


// Solution

$ A = 1;
If ($)
{
Echo $;
}
Else
{

}

// Output 1
// Add it to the header of the article

Error_reporting (0 );

If ($)
{
Echo $;
}
Else
{

}

Solution summary

1. If a variable does not apply for a direct name, such as $ a = 1.
2. Add error_reporting (0) to the header of the article. No errors are prompted.
3. isset ($ _ GET ["page"]) or: @ $ page = $ _ GET ["page"]
4. Use error_reporting = E_ALL & ~ in php. ini &~ E_NOTICE can disable the display of notice, so it is good to block such warnings,

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