Undefined index error PHP
This error appears because of your PHP error reporting settings. Usually, it appears when your variable is not properly set.
There are
two ways to handle this issue:
1. Check if $_POST['action'] is set before using it. For example:
if (!isset($_POST['action']))
{
//If not isset -> set with dumy value
$_POST['action'] = "undefine";
}
2. Suppress Notice warnings
Notice warnings could be suppressed by changing the error_reporting variable in your
PHP.ini. error_reporting could be set to show all errors except those for notices and coding standards warnings:
error_reporting = E_ALL & ~E_NOTICE
The same is accomplished by adding the following line in your php page:
<?php error_reporting (E_ALL ^ E_NOTICE); ?>
