Code: Select all
<?php
$num_to_guess = 42;
$num_tries = (isset($_POST['num_tries'])) ? (int)$num_tries + 1 : 0;
$message = "";
if (!isset($_POST['guess']))
{
$message = "Welcome to the guessing machine!";
}
elseif ($_POST['guess'] > $num_to_guess )
{
$message = "$_POST[guess] is too big! Try a smaller number";
}
elseif ($_POST['guess'] < $num_to_guess )
{
$message = "$_POST[guess] is too small! Try a larger number";
}
else
{ // must be equivalent
$message = "Well done!";
}
$guess = (int) $_POST['guess'];
?>
<html>
<head>
<title>Listing 9.8 Saving state with a hidden field</title>
</head>
<body>
<h1>
<?php print $message ?>
</h1>
Guess number: <?php print $num_tries?>
<form action="<?php print $_SERVER['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>This is the example suppose to call from same page .
what's the problem with this coding ? it keep showing the error message after i press enter. Can anyone help pls ?
Notice: Undefined variable: num_tries in C:\Mywork\new\test.php on line 3