undefine index error 'ref'

[shubho]

<?php
require_once ('database/database.inc.php');
$myDb = new Db;
include ('siteconfig.inc.php');
require_once ('controls.inc.php');
if(isset($_COOKIE["usReferrer"])){
}else
{
setcookie("usReferrer",limpiar($_GET["ref"]),time()+7776000);
}
?>

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in the above the error message is following

undefined index 'ref'

please help me

[Ahri]

You need to check that $_GET["ref"] exists, with isset();

PHP Code:

<?php
require_once ('database/database.inc.php');
$myDb = new Db;
include ('siteconfig.inc.php');
require_once ('controls.inc.php');
if(isset($_COOKIE["usReferrer"])){
} elseif(isset($_GET["ref"]))
{
    setcookie("usReferrer",limpiar($_GET["ref"]),time()+7776000);
}
?>