Parsing PHP calls to existing search engines_PHP Tutorial

$key = $_GET['key']; //Get Keywords
$select = $_GET['select']; //Get the search engine selection
switch($select) //Jump to different pages according to different search engines
{
case "google": //GOOGLE
$url = "http://www.google.com/search?q=".$key;
header("Location: $url");
break;
case "yahoo": //YAHOO
$url = "http://search.yahoo.com/search?p=".$key;
header("Location : $url ");
break;
case "baidu": Baidu
$url = "http://www.baidu.com/s?wd=".$key;
header( "Location: $url");
              break;                                                                           ;



The running results are shown in Figure 36-4.