Notice: Undefined index body - php

Question

I have sth like this:
<?php
$body = $_GET["body"];
if ($body=="")
{
include("includes/desktop.php");
}
else
{
if (is_file("includes/$body.php"))
{
include("includes/$body.php");
}
else
{
include("includes/desktop.php");
}
}
?>
How to make that this notice will disappear?
It happens only when $_GET["body"] is empty.
Notice: Undefined index: body in C:\wamp\www\admin\index.php on line
106

Answer 1

change
$body = $_GET["body"];
To
$body = isset($_GET["body"]) ? $_GET["body"] : '';
You can find almost all symbols and operators in php here

Answer 2

It's happening because there is no index body in the superglobal $_GET array. In other words, you're not passing $_GET['body'].
Instead use:
if (isset($_GET['body']) && $_GET['body']) {
That checks for both the index and a meaningful (non-falsy) value.

Answer 3

Try
if (!isset($_GET['body']) || empty($_GET['body'])) {
include("includes/desktop.php");
} else {
...
}
http://www.php.net/isset
On a side note: You should never trust user input. Directly passing the body GET parameter to your include() call allows a malicious user to include files you never intended to load.

Answer 4

It is warning you that body is not sent via $_GET. You need to do something like this
<?php
if (isset($_GET["body"])) {
$body = $_GET["body"];
if ($body=="")
{
include("includes/desktop.php");
}
else
{
if (is_file("includes/$body.php"))
{
include("includes/$body.php");
}
else
{
include("includes/desktop.php");
}
}
}
?>