How does PHPBuilder do that? - Keeping contents of text boxes

[Calahan]

I'm trying to find a way of keeping the contents of a user submitted text box when a user uses the back button to go back to the page. The user is given a warning by the browser as the information on that page was generated from $_POST variables, they click ok but the text box that they filled out is empty and they have to re-type everything.

Is there any way around this?

[Weedpacket]

Put the values of any $_POST variables that have values back in the form,

e.g.,

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