php - How to prevent user from bookmarking URLs? -

my website's webpages displays webpages using get retrieve variables predefined url. example code on first page: index.php

<p><a href="/blank.php?name1=value1&amp;name2=value2">next page</a></p> 

the second page: blank.php?name1=value1&name2=value2

$name1 = $_get['name1'] ; $name2 = $_get['name2'] ; echo $name1 ; echo $name2 ; 

this way webpages created on spot , displayed kind of cms , iuse method webpages site has, if user bookmarks tab have out of date information webpage because page content contained in url.

edit: if use post better way of conveying information new webpage? instead of:

<form method="post" action="blank.php">     <input type="hidden" name="name1" value="value1">     <input type="submit"> </form> 

quick , dirty solution: add timestamp parameter urls, like:

<p><a href="/blank.php?name1=value1&amp;name2=value2&amp;time=<?php echo time(); ?>">next page</a></p> 

then, on page, check if timestamp older duration:

if(!isset($_get['time']) || time() - intval($_get['time']) > 60*60) {     header('location: index.php'); }  $name1 = $_get['name1'] ; $name2 = $_get['name2'] ; echo htmlspecialchars($name1); echo htmlspecialchars($name2); 

so if link older 1 hour (60 seconds times 60 minutes), redirected home page!

but method not user friendly! should better try build links never old content when visiting!