PHP Notice: undefined index causes and solutions_PHP tutorial

When developing PHP, you may encounter error messages such as PHP Notice: undefined index. Let me introduce to you the solution to the undefined index error message.

For example $_GET['aa']; PHP Notice: undefined index ‘aa‘ will appear.

Let me summarize the solutions to PHP Notice: undefined index.

1. php.ini configuration file, error_reporting = E_ALL & ~E_NOTICE

2. Add an isset function isset($_GET["page"]) if-else judgment

Another way is to customize a function, so that you can directly use the function operation

}

The code is as follows

代码如下	复制代码
function _get($str){     $val = !empty($_GET[$str]) ? $_GET[$str] : null;     return $val; }

Copy code

function _get($str){

$val = !empty($_GET[$str]) ? $_GET[$str] : null;

Return $val;

Call method _get('str') instead of $_GET['str'] can http://www.bkjia.com/PHPjc/632144.html

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http: //www.bkjia.com/PHPjc/632144.htmlTechArticleWhen developing PHP, you may encounter errors such as PHP Notice: undefined index. Let me tell you about it below. Introducing the solution to the undefined index error message. For example, $_GET['aa']; will...