cosi dovrebbe andare
codice:
<?php
session_start();
$key="keyword";
$redirect="http://www.domain.it/name.php";
$url=$_SERVER['HTTP_REFERER'];
$parsed_url=parse_url($url);
$query=$parsed_url[query];
$expla=explode("&",$query);
foreach ($expla as $valore) {
$valore = strtolower($valore);
if ((strlen($valore)>1)&&(substr_compare($valore, "q=", 0, 2)==0)){
$ref_keyword_arr=explode("=",$valore);
$ref_keyword=$ref_keyword_arr[1];
}
}
if ((isset($ref_keyword))&&($key == $ref_keyword )) {
$_SESSION=array();
session_destroy();
header("Location: $redirect");
} else {
$_SESSION=array();
session_destroy();
}
?>