Creating a "Guess the Number" Game

**MGT-Evelath** · 10-01-2007, 03:29 AM

This is what I've got so far. I'm trying to get a random between 1 and 100 created. Then announce if the user is too low, or too high when they enter a number.

PHP Code:


			
<html>

<head>
<title>"I'm thinking of a number"</title>
</head>

<body>

<?php

if (isset($_POST['GuessNumber']))
{
  $SecretNumber = rand(1,100);
}


if ($SecretNumber == $GuessNumber)
{
  print "Correct!!";
}


else if ($SecretNumber < $GuessNumber)
{
  print "Too high";
}

else if ($SecretNumber > $GuessNumber)
{
  print "Too low";
}

else 
{
print "Please enter a number";
}
?>

<form action="<?php $_SERVER['PHP_SELF']?>" method="post">
I'm thinking of a number from 1 to 100<br>
<input type="hidden" name="SecretNumber" value="<?php $SecretNumber ?>">
<input type="text" name="GuessNumber" value="<?php $GuessNumber ?>">
<input type="submit" value="Submit">
</form>

</body>

Any assistance would be great.

**mtishetsky** · 10-01-2007, 05:46 AM

What is the problem? How to store the number between pages?

**flann** · 10-01-2007, 11:23 AM

the way you've written this, you would need to have register_globals on. This is a bad coding practice however, so I would recommend turning it off and manually getting the values of your post elements. Also, you should sanitize them before you put them into variables.

**MGT-Evelath** · 10-01-2007, 02:04 PM

Ok, I changed it around to this:

PHP Code:


			
<html>

<head>
<title>I'm thinking of a number</title>
</head>

<body>


<?php

$SecretNumber = $_REQUEST['SecretNumber'];
$GuessNumber = $_REQUEST['GuessNumber'];

if (!isset($SecretNumber))
{
  $SecretNumber = rand(0,100);
}

if ($_POST['SecretNumber'] == $GuessNumber)
{
  echo "Correct!!! You have guessed the number in ... attempt";
}

else if ($_POST['GuessNumber'] > $SecretNumber)
{
  echo "Too high";
}

else if ($_POST['GuessNumber'] < $SecretNumber)
{
  echo "Too low";
}

else
{
  echo "You should enter a number";
}

?>

<form action="<?php $_SERVER['PHP_SELF']?>" method="post">
I'm thinking of a number from 1 to 100<br>
<input type="hidden" name="SecretNumber" value="<?php $SecretNumber ?>">
<input type="text" name="GuessNumber" value="<?php $GuessNumber ?>">
<input type="submit" value="Submit">
</form>

</body>

The error I get is that I can't actually get to the complete number. It is always too high or too low. And (if you use the code you'll see), When there is nothing in the input box it still comes up with "too high" or "too low" or "correct".

**flann** · 10-01-2007, 02:11 PM

try this:

PHP Code:


			
<html>

<head>
<title>I'm thinking of a number</title>
</head>

<body>


<?php

$SecretNumber = $_POST['SecretNumber'];
$GuessNumber = $_POST['GuessNumber'];

if (!isset($SecretNumber))
{
  $SecretNumber = rand(0,100);
}

if ($_POST['SecretNumber'] == $GuessNumber)
{
  echo "Correct!!! You have guessed the number in ... attempt";
}

else if ($_POST['GuessNumber'] > $SecretNumber)
{
  echo "Too high";
}

else if ($_POST['GuessNumber'] < $SecretNumber)
{
  echo "Too low";
}

else
{
  echo "You should enter a number";
}

?>

<form action="<?php $_SERVER['PHP_SELF']?>" method="post">
I'm thinking of a number from 1 to 100<br>
<input type="hidden" name="SecretNumber" value="<?php echo($SecretNumber); ?>">
<input type="text" name="GuessNumber" value="<?php echo($GuessNumber); ?>">
<input type="submit" value="Submit">
</form>

</body>

**MGT-Evelath** · 10-01-2007, 03:56 PM

Awesome, thank you. I'm trying to display how many times it takes for the user to get to the correct number.

PHP Code:


			
<html>

<head>
<title>I'm thinking of a number</title>
</head>

<body>


<?php

$Amt++;
$SecretNumber = $_POST['SecretNumber'];
$GuessNumber = $_POST['GuessNumber'];

if (!isset($SecretNumber))
{
  $SecretNumber = rand(0,100);
}

if ($_POST['SecretNumber'] == $GuessNumber)
{
  echo "Correct!!! You have guessed the number in $Amt attempts";
}

else if ($_POST['GuessNumber'] > $SecretNumber)
{
  echo "Too high";
}

else if ($_POST['GuessNumber'] < $SecretNumber)
{
  echo "Too low";
}

else
{
  echo "You should enter a number";
}

?>

<form action="<?php $_SERVER['PHP_SELF']?>" method="post">
I'm thinking of a number from 1 to 100<br>
<input type="hidden" name="SecretNumber" value="<?php echo($SecretNumber); ?>">
<input type="hidden" name="Amt" value="<?php echo($Amt); ?>">
<input type="text" name="GuessNumber" value="<?php echo($GuessNumber); ?>">
<input type="submit" value="Submit">
</form>

</body>

However it only states "1" for the amount of times.

**flann** · 10-01-2007, 05:03 PM

get the posted amount then increment it by 1

**dansgalaxy** · 10-01-2007, 06:11 PM

This should do it

PHP Code:


			
<html>

<head>
<title>I'm thinking of a number</title>
</head>

<body>


<?php

$Amt++;
$SecretNumber = $_POST['SecretNumber'];
$GuessNumber = $_POST['GuessNumber'];
$Amt = $_POST['Amt'];

if (!isset($SecretNumber))
{
  $SecretNumber = rand(0,100);
}

if ($_POST['SecretNumber'] == $GuessNumber)
{
  echo "Correct!!! You have guessed the number in $Amt attempts";
}

else if ($_POST['GuessNumber'] > $SecretNumber)
{
  echo "Too high";
$Amt++;
}

else if ($_POST['GuessNumber'] < $SecretNumber)
{
  echo "Too low";
$Amt++;
}

else
{
  echo "You should enter a number";
}

?>

<form action="<?php $_SERVER['PHP_SELF']?>" method="post">
I'm thinking of a number from 1 to 100<br>
<input type="hidden" name="SecretNumber" value="<?php echo($SecretNumber); ?>">
<input type="hidden" name="Amt" value="<?php echo($Amt); ?>">
<input type="text" name="GuessNumber" value="<?php echo($GuessNumber); ?>">
<input type="submit" value="Submit">
</form>

</body>

Also if you use this kind of this as a competition, A you could easily cheat the script so you could do it and keep doing it so at a max (unless you guess it right on the first go) you could take 50 guesses and the script would think you only had two because you cheaeted..

TP apprieciated

Dan

**idkwot** · 10-02-2007, 03:10 PM

hmm, looks like a decent start

**dansgalaxy** · 10-02-2007, 04:25 PM

You know what they should add to forums is a "Nudge" feature, so if osmeon done replie to their thread to can send em a nudge which remind them

Dan

**Galaxian** · 10-03-2007, 07:21 AM

I'd recommend storing the secret number by other means because they can always view the secret number in the source if you put it in hidden.

Perhaps session, db, or cookie? But cookie they could just view as well lol

**dansgalaxy** · 10-03-2007, 11:38 AM

best bet is to simply have a db. a table which when they start the game, it creates a entry with their ip a session the magic number and attempts

everytime the page loads, if there is already a entry read the attempts and the magic number... etc etc..

If interested i could write it

**Galaxian** · 10-03-2007, 07:15 PM

But then you've got the issue of people with shared ip like aol proxy or whatever.. Have a user system where it's assigned uniquely to the user that way it's guarenteed.

Or Session!!

**dansgalaxy** · 10-04-2007, 12:16 PM

*cough cough*

Quote:

their ip a session the magic

i did say use a session...

storing their ip was just well pointless but it can be handy..

**Foundationflash** · 10-04-2007, 12:51 PM

What about dynamic IPs?