repopulating HTML variables after history(-1) from $_POST with PHP

fred2014 · 03-09-2015, 11:29 AM

Developing a web page on windows using apache-php I can send a history -1 (back a page) via PHP/jscript and a form will re-populate its variables

However when I upload the same code/page to my centos server (same apache php etc)the variables don't get re-instated. i.e. the form is empty again.

The form uses the POST method so presumably the contents still exist in that
but I'm not very familiar with javascript or why this only works automatically on windows.

can anyone tell me the simplest way to get this form repopulated on a centos/apache server please?

fred2014 · 03-10-2015, 07:22 AM

anyone - any ideas?

Guttorm · 03-10-2015, 07:40 AM

Hi

How does that PHP page look like? In old versions of PHP, things sent with POST or GET were assigned as global variables. There was a "register_globals" setting you could set in php.ini, but in new versions, it's been dropped.

If your PHP is a bit old, you turn on register_globals in php.ini. But if it's 5.4 or newer, you have to fix the code.

For example change a line like this:

PHP Code:



<input type="text" name="username" value="<?php echo $username; ?>">

Into this:

PHP Code:



<input type="text" name="username" value="<?php echo htmlspecialchars($_POST['username']); ?>">

fred2014 · 03-10-2015, 09:32 AM

thanks guttorm

I'm familiar with $_POST in php - If I understand correctly all I need do is your suggested changes and rename the HTML file to PHP.
(I've never really used javascript as such hence my uncertainty)
I will give that a go.