Referer

index.php

<pre>
File: <?=basename($_SERVER['SCRIPT_FILENAME']);?>


Referer: <?=$_SERVER['HTTP_REFERER'];?>


Lanjut: <a href="index.php">index.php</a>
        <a href="a.php">a.php</a>
        <a href="b.php">b.php</a>
        <a href="c.php">c.php</a>

Loncat: <a href="loncat-ke-index.php">loncat-ke-index.php</a>
        <a href="loncat-ke-a.php">loncat-ke-a.php</a>
        <a href="loncat-ke-b.php">loncat-ke-b.php</a>
        <a href="loncat-ke-c.php">loncat-ke-c.php</a>

Source: <a href="<?=basename($_SERVER['SCRIPT_FILENAME']);?>s"><?=basename($_SERVER['SCRIPT_FILENAME']);?>s</a>
        <a href="loncat-ke-<?=basename($_SERVER['SCRIPT_FILENAME']);?>s">loncat-ke-<?=basename($_SERVER['SCRIPT_FILENAME']);?>s</a>

loncat-ke-index.php

<?php

$fname = basename($_SERVER['SCRIPT_FILENAME']);
preg_match('/^loncat-ke-(\w+)\.php$/', $fname, $m);

if (isset($m[1])) {
    $next = $m[1];
    header('location: ' . $next . '.php');
}