Save State with a Hidden Field in PHP
Description
The following code shows how to save State with a Hidden Field.
Example
<?php//from w ww . j av a 2 s . co m
$num_to_guess = 42;
$message = "";
$num_tries = ( isset( $num_tries ) ) ? ++$num_tries : 0;
if ( ! isset( $guess ) ){
$message = "Welcome to the guessing machine!";
}elseif( $guess > $num_to_guess ){
$message = "$guess is too big!";
}elseif( $guess < $num_to_guess ){
$message = "$guess is too small!";
}else{
$message = "Well done!";
}
$guess = (int) $guess;
?>
<html>
<head>
<title>Saving state with a hidden field</title>
</head>
<body>
<h1>
<?php print $message ?>
</h1>
Guess number: <?php print $num_tries?>
<form action="<?php print $PHP_SELF?>" method="POST">
Type your guess here:
<input type="text" name="guess" value="<?php print $guess?>">
<input type="hidden" name="num_tries" value="<?php print $num_tries?>">
</form>
</body>
</html>