example:
页面: dl.php
————————————————————————————–
<?php
http://www.gaodaima.com/45963.html如何在PHP程序中防止盗链_php
$id = $_GET[‘id’];
$act = $_GET[‘act’];
switch($act) {
default :
case “display” : displayHTML(); break;
case “down” : down(); break;
}
function displayHTML($id) {
setcookie(“visited”, “true”);
// print your HTML.
}
function down($id) {
if(! isset($_COOKIE[‘visited’]) ) print “你盗联?”;
$sql = “select path from TABLE where id=”. $id;
//…………………………
}
?>
<a href=”dl.php?id=1&act=down”>Download Now…</a>
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