persistence.php
Source of persistence.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html lang="EN" dir="ltr" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>
persistence demo
</title>
</head>
<body>
<h1>Persistence Demo</h1>
<form action = ""
method = "post">
<?php
//load up variables
$txtBoxCounter = filter_input(INPUT_POST, "txtBoxCounter");
$hdnCounter = filter_input(INPUT_POST, "hdnCounter");
//increment the counters
$txtBoxCounter++;
$hdnCounter++;
print <<<HERE
<fieldset>
<input type = "text"
name = "txtBoxCounter"
value = "$txtBoxCounter" />
<input type = "hidden"
name = "hdnCounter"
value = "$hdnCounter" />
<h3>The hidden value is $hdnCounter</h3>
<input type = "submit"
value = "click to increment counters" />
HERE;
?>
</fieldset>
</form>
</body>
</html>