<?php 

cagir(); 


function cagir() 
{ 
$site = (int)$_GET["site"]; 
benqbenq($site);
} 


function benqbenq($site)
{

 
        switch($site) 
        { 
        case 1:
        echo '1';
        case 2:
        echo '2';
        break; 
        case 3:
        echo '3';
        break; 
        } 

}

?>
böyle yap