PHP prompt undefined index solution_PHP tutorial

Undefined index error messages often appear in PHP development. Let’s take a look at a summary of the methods below.

When you usually use $_post[''], $_get[''] to obtain the parameters in the form, Notice: Undefined index: --------;

Server configuration modification
Modify the php.ini configuration file,

代码如下	复制代码
error_reporting = E_ALL & ~E_NOTICE

Program Judgment

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; }

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代码如下	复制代码
error_reporting(E_ALL ^ E_NOTICE);

function _get($str){

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

return $val;

代码如下	复制代码
$var = isset($_GET['a'])?$_GET['a']:'';

}

Another way is to close the error code in php

The code is as follows

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error_reporting(E_ALL ^ ​​E_NOTICE); Use isset method

The code is as follows	Copy code
$var = isset($_GET['a'])?$_GET['a']:''; http://www.bkjia.com/PHPjc/629073.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/629073.htmlTechArticleError messages like undefined index often appear in PHP development. Let’s take a look at the method summary. Usually when using $_post[''], $_get[''] to obtain parameters in the form, Notice: Undefine...