I need to modify a block of code and add a counter regarding how many times it took the user to guess the right number.
I was wondering how it would be properly implemented into my code.
This is what I have so far.
<?php
if (!isset($_POST["guess"])) {
$message = "Welcome to the guessing machine!";
$count++; //Declare the variable $count to increment by 1.
$_POST["numtobeguessed"] = rand(0,1000);
} else if ($_POST["guess"] > $_POST["numtobeguessed"]) { //greater than
$message = $_POST["guess"]." is too big! Try a smaller number.";
} else if ($_POST["guess"] < $_POST["numtobeguessed"]) { //less than
$message = $_POST["guess"]." is too small! Try a larger number.";
} else { // must be equivalent
$message = "Well done! You guessed the right number in ".$count." attempt(s)!";
//Include the $count variable to the $message to show the user how many tries to took him.
}
?>
<html>
<head>
<title>A PHP number guessing script</title>
</head>
<body>
<h1><?php echo $message; ?></h1>
<form action="" method="POST">
<p><strong>Type your guess here:</strong>
<input type="text" name="guess"></p>
<input type="hidden" name="numtobeguessed"
value="<?php echo $_POST["numtobeguessed"]; ?>" ></p>
<p><input type="submit" value="Submit your guess"/></p>
</form>
</body>
</html>
You have to use PHP Sessions to keep track of the count.
All you have to do is initialize counter to 0 and have it increment when the user guesses a number
<?php
session_start();
if (!isset($_POST["guess"])) {
$_SESSION["count"] = 0; //Initialize count
$message = "Welcome to the guessing machine!";
$_POST["numtobeguessed"] = rand(0,1000);
echo $_POST["numtobeguessed"];
} else if ($_POST["guess"] > $_POST["numtobeguessed"]) { //greater than
$message = $_POST["guess"]." is too big! Try a smaller number.";
$_SESSION["count"]++; //Declare the variable $count to increment by 1.
} else if ($_POST["guess"] < $_POST["numtobeguessed"]) { //less than
$message = $_POST["guess"]." is too small! Try a larger number.";
$_SESSION["count"]++; //Declare the variable $count to increment by 1.
} else { // must be equivalent
$_SESSION["count"]++;
$message = "Well done! You guessed the right number in ".$_SESSION["count"]." attempt(s)!";
unset($_SESSION["count"]);
//Include the $count variable to the $message to show the user how many tries to took him.
}
?>
<html>
<head>
<title>A PHP number guessing script</title>
</head>
<body>
<h1><?php echo $message; ?></h1>
<form action="" method="POST">
<p><strong>Type your guess here:</strong>
<input type="text" name="guess"></p>
<input type="hidden" name="numtobeguessed"
value="<?php echo $_POST["numtobeguessed"]; ?>" ></p>
<p><input type="submit" value="Submit your guess"/></p>
</form>
</body>
</html>
This should work for you.
$count = isset($_POST['count']) ? $_POST['count'] : 0; //Use post value if defined. If not set to 1.
if (!isset($_POST["guess"])) {
$message = "Welcome to the guessing machine!";
$_POST["numtobeguessed"] = rand(0,1000);
} else if ($_POST["guess"] > $_POST["numtobeguessed"]) { //greater than
$message = $_POST["guess"]." is too big! Try a smaller number.";
} else if ($_POST["guess"] < $_POST["numtobeguessed"]) { //less than
$message = $_POST["guess"]." is too small! Try a larger number.";
} else { // must be equivalent
$message = "Well done! You guessed the right number in ".$count." attempt(s)!";
//Include the $count variable to the $message to show the user how many tries to took him.
}
$count++;
?>
<html>
<head>
<title>A PHP number guessing script</title>
</head>
<body>
<h1><?php echo $message; ?></h1>
<form action="" method="POST">
<p><strong>Type your guess here:</strong>
<input type="text" name="guess"></p>
<input type="hidden" name="numtobeguessed"
value="<?php echo $_POST["numtobeguessed"]; ?>" ></p>
<input type="hidden" name="count"
value="<?php echo $count; ?>" ></p>
<p><input type="submit" value="Submit your guess"/></p>
</form>
</body>
</html>
on 22.6.2021 i wrote a Guess Number in Range [0 .. aMaxIntValue] sample Web Application using PHP. i think the following code may help you. the code is kept in a Single PHP file. it generates #4 HTML pages ...
the 1st initial page is used to collect application parameters (e.g. the Max Int Number to Guess)
the 2nd page is the Main Play Game Page where the user is asked to Guess the Secret Number or to Reset Game. this page shows the previous user guesses and some tips for the user about the guess
the 3rd page is used to notify the user looses game (that is he has no more tries left)
the 4th page is used to notify the user wins the game (that is the Guess was OK)
the Number of Tries left to the User is computed using the values range [0 .. max]
the Secret Number to Guess is a random generated integer number
this is the PHP + HTML code ...
<?php
session_start();
error_reporting (E_PARSE | E_COMPILE_ERROR);
function ResetGame()
{
unset ( $_SESSION['theMaxNumber'] );
}
function InitGame()
{
$_SESSION['theNumberToGuess'] = mt_rand (0, $_SESSION['theMaxNumber']);
$_SESSION['theMaxNumberOfTries'] = floor ( log ($_SESSION['theMaxNumber'], 2) ) + 1;
$_SESSION['theUserTriesCount'] = 0;
$_SESSION['thePrevGuessesString'] = '';
$_SESSION['theUserGuess'] = 0;
}
function ComputeNumberOfTriesLeft()
{
return $_SESSION['theMaxNumberOfTries'] - $_SESSION['theUserTriesCount'];
}
function IsNoMoreTriesLeft()
{
return ComputeNumberOfTriesLeft() <= 0;
}
$aCanPlayGame = false;
$aUserSubmittedGuess = false;
$aIsNoMoreTriesLeft = false;
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if ( isset ($_REQUEST['playgame']) ) {
$_SESSION['theMaxNumber'] = intval($_REQUEST['theMaxNumber']);
// init game ...
InitGame();
$aCanPlayGame = true;
}
elseif ( isset ($_REQUEST['submituserguess']) ) {
$aCanPlayGame = true;
$aUserSubmittedGuess = true;
$_SESSION['theUserGuess'] = intval($_REQUEST['theUserGuess']);
}
elseif ( isset ($_REQUEST['resetgame']) ) {
ResetGame();
}
else {
ResetGame();
}
}
else {
ResetGame();
}
// check a play
$aUserShouldTryLower = false;
$aUserShouldTryHigher = false;
$aUserWins = false;
$aUserLooses = false;
if ($aCanPlayGame) {
$aIsNoMoreTriesLeft = IsNoMoreTriesLeft();
if ( ! $aIsNoMoreTriesLeft ) {
// user have tries left
if ($aUserSubmittedGuess) {
// check user guess ...
$aUserGuess = intval($_SESSION['theUserGuess']);
if ( $aUserGuess > $_SESSION['theNumberToGuess'] ) {
$aUserShouldTryLower = true;
}
elseif ( $aUserGuess < $_SESSION['theNumberToGuess'] ) {
$aUserShouldTryHigher = true;
}
else {
$aUserWins = true;
// also reset game
ResetGame();
}
// add the current guess to the prev guesses string
$_SESSION['thePrevGuessesString'] .= $_SESSION['theUserGuess'] . ' ';
// increase the user tries count
++ $_SESSION['theUserTriesCount'];
// check tries count
if ( ! $aUserWins ) {
$aIsNoMoreTriesLeft = IsNoMoreTriesLeft();
if ($aIsNoMoreTriesLeft) {
// this was the last try
// no more tries left
$aUserLooses = true;
// also reset game
ResetGame();
}
}
}
}
else {
// no more tries left
$aUserLooses = true;
// also reset game
ResetGame();
}
}
?>
<?php if ($aUserLooses): ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>Sorry, you loose the game</p>
<p>the Number to Guess was <?php echo $_SESSION['theNumberToGuess']; ?></p>
<form method="post">
<input type="submit" name="resetgame" value="reset game">
</form>
</body>
</html>
<?php elseif ($aUserWins): ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>Congrats, you Win the Game</p>
<p>the Number to Guess was <?php echo $_SESSION['theNumberToGuess']; ?></p>
<form method="post">
<input type="submit" name="resetgame" value="reset game">
</form>
</body>
</html>
<?php elseif ($aCanPlayGame): ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>the Max Number is <?php echo $_SESSION['theMaxNumber']; ?></p>
<p>Guess a Number in the Range [ 0 .. <?php echo ($_SESSION['theMaxNumber']); ?> ]</p>
<p>[DEBUG] the secret number to guess is <?php echo $_SESSION['theNumberToGuess']; ?></p>
<p>you have <?php echo ComputeNumberOfTriesLeft(); ?> tries left</p>
<form method="post">
<label for="theUserGuess">Enter your Guess: </label>
<input type="text" id="theUserGuess" name="theUserGuess">
<input type="submit" name="submituserguess" value="Guess">
<input type="submit" name="resetgame" value="reset game">
</form>
<p>Prev Guesses: <?php echo $_SESSION['thePrevGuessesString']; ?> </p>
<p>
<?php
if ($aUserShouldTryLower) {
echo 'you should try a lower < guess';
}
elseif ($aUserShouldTryHigher) {
echo 'you should try a higher > guess';
}
else {
echo 'no guess';
}
?>
</p>
</body>
</html>
<?php else: ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>Guess a Number from (0) to ... </p>
<form method="post">
<input id="theMaxNumber" name="theMaxNumber">
<input type="submit" name="playgame" value="play game">
</form>
</body>
</html>
<?php endif; ?>
that's all folks ...
Related
I'm new to PHP and I'm trying to create an easy form that has multiple steps. For each step, a validation of the input is happening before the user is directed to the next page. If the validation fails, the user should stay on the same page and an error message should be displayed. In the end, all entries that the user has made should be displayed in an overview page.
What I have been doing to solve this, is to use a boolean for each page and only once this is true, the user can go to the next page. This is not working as expected unfortunately and I guess it has something to do with sessions in PHP... I also guess that there's a nicer way to do this. I would appreciate some help!
Here's my code:
<!DOCTYPE HTML>
<html>
<head>
<title>PHP Test</title>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>
<?php
session_start();
$_SESSION['$entryOne'] = "";
$_SESSION['$entryOneErr'] = $_SESSION['$emptyFieldErr'] = "";
$_SESSION['entryOneIsValid'] = false;
$_SESSION['$entryTwo'] = "";
$_SESSION['$entryTwoErr'] = "";
$_SESSION['entryTwoIsValid'] = false;
// Validation for first page
if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST['submitEntryOne'])) {
if (!empty($_POST["entryOne"])) {
// Check for special characters
$_SESSION['$entryOne'] = removeWhitespaces($_POST["entryOne"]);
$_SESSION['$entryOneErr'] = testForIllegalCharError($_SESSION['$entryOne'], $_SESSION['$entryOneErr']);
// If error text is empty set first page to valid
if(empty($_SESSION['$entryOneErr'])){
$_SESSION['$entryOneIsValid'] = true;
}
} else {
// Show error if field hasn't been filled
$_SESSION['$emptyFieldErr'] = "Please enter something!";
}
// Validation for second page
} else if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST['submitEntryTwo'])) {
if (!empty($_POST["entryTwo"])) {
// Check for special characters
$_SESSION['$entryTwo'] = removeWhitespaces($_POST["entryTwo"]);
$_SESSION['$entryTwoErr'] = testForIllegalCharError($_SESSION['$entryTwo'], $_SESSION['$entryTwoErr']);
// If error text is empty set second page to valid
if(empty($_SESSION['$entryTwoErr'])){
$_SESSION['$entryTwoIsValid'] = true;
}
} else {
// Show error if field hasn't been filled
$_SESSION['$emptyFieldErr'] = "Please enter something!";
}
}
//Remove whitespaces at beginning and end of an entry
function removeWhitespaces($data) {
$data = trim($data);
return $data;
}
//Check that no special characters were entered. If so, set error
function testForIllegalCharError($wish, $error){
$illegalChar = '/[\'\/~`\!##\$%\^&\*\(\)_\-\+=\{\}\[\]\|;:"\<\>,\.\?\\\]/';
if (preg_match($illegalChar,$wish)) {
$error = "Special characters are not allowed";
} else {
$error = "";
}
return $error;
}
?>
<?php if (isset($_POST['submitEntryOne']) && $_SESSION['$entryOneIsValid'] && !$_SESSION['$entryTwoIsValid']): ?>
<h2>Second page</h2>
<p>Entry from first Page: <?php echo $_SESSION['$entryOne'];?></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Entry Two: <input type="text" name="entryTwo" value="<?php echo $_SESSION['$entryTwo'];?>">
<span class="error"><?php echo $_SESSION['$entryTwoErr'];?></span>
<br><br>
<input type="submit" name="submitEntryTwo" value="Next">
</form>
<?php elseif (isset($_POST['submitEntryTwo']) && $_SESSION['$entryTwoIsValid']): ?>
<h2>Overview</h2>
<p>First entry: <?php echo $_SESSION['$entryOne'];?></p>
<p>Second Entry: <?php echo $_SESSION['$entryTwo'];?></p>
<?php else: ?>
<h2>First page</h2>
<span class="error"><?php echo $_SESSION['$emptyFieldErr'];?></span>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<br><br>
First entry: <input type="text" name="entryOne" value="<?php echo $_SESSION['$entryOne'];?>">
<span class="error"> <?php echo $_SESSION['$entryOneErr'];?></span>
<br><br>
<input type="submit" name="submitEntryOne" value="Next">
</form>
<?php endif; ?>
</body>
</html>
You are setting your session variables to "" at the top of your script.
Check if your variable is set before setting to blank.
Check if Session Variable is Set First
<?php
//If variable is set, use it. Otherwise, set to null.
// This will carry the variable session to session.
$entryOne = isset($_REQUEST['entryOne']) ? $_REQUEST['entryOne'] : null;
if($entryOne) {
doSomething();
}
?>
Tips
Then you can use <?= notation to also echo the variable.
Do this $_SESSION['variable'] instead of $_SESSION['$variable'] (you'll spare yourself some variable mistakes).
<h2>Second page</h2>
<p>Entry from first Page: <?= $entryOne ?></p>
Example Script
This could be dramatically improved, but for a quick pass:
<?php
error_reporting(E_ALL);
ini_set("display_errors", 1);
//Check that no special characters were entered. If so, set error
function hasIllegalChar($input){
$illegalChar = '/[\'\/~`\!##\$%\^&\*\(\)_\-\+=\{\}\[\]\|;:"\<\>,\.\?\\\]/';
if (preg_match($illegalChar, $input)) {
return true;
}
return false;
}
session_start();
// Destroy session and redirect if reset form link is pressed.
if(isset($_GET['resetForm']) && $_GET['resetForm'] == "yes")
{
echo "SESSION DESTROY";
session_destroy();
header("Location: ?");
}
// Session
$page = isset($_SESSION['page']) ? $_SESSION['page'] : 1;
$errors = [];
// Value history.
$valueOne = isset($_SESSION['valueOne']) ? $_SESSION['valueOne'] : null;
$valueTwo = isset($_SESSION['valueTwo']) ? $_SESSION['valueTwo'] : null;
// Clean inputs here
$fieldOne = isset($_REQUEST['fieldOne']) ? trim($_REQUEST['fieldOne']) : null;
$fieldTwo = isset($_REQUEST['fieldTwo']) ? trim($_REQUEST['fieldTwo']) : null;
// First form
if ($page == 1) {
// If field two is submitted:
if ($fieldOne) {
//Validate inputs
if(hasIllegalChar($fieldOne)) {
$errors[] = "You entered an invalid character.";
}
if (count($errors) == 0 ){
$valueOne = $_SESSION['valueOne'] = $fieldOne;
$page = $_SESSION['page'] = 2;
}
}
}
// Second form
else if ($page == 2) {
// If field two is submitted:
if ($fieldTwo) {
//Validate inputs
if(hasIllegalChar($fieldTwo)) {
$errors[] = "You entered an invalid character.";
}
if (count($errors) == 0 ){
$valueTwo = $_SESSION['valueTwo'] = $fieldTwo;
$page = $_SESSION['page'] = 3;
}
}
}
?>
<!DOCTYPE HTML>
<html>
<head>
<title>PHP Test</title>
<style>
.error {
color: #FF0000;
}
</style>
</head>
<body>
<?php
// troubleshoot
if (true) {
echo "<pre>";
var_dump($_REQUEST);
var_dump($_SESSION);
echo "</pre>";
}
echo "<h1>Page " . $page . '</h1>';
if (count($errors) > 0) {
$errorMsg = implode('<br/>',$errors);
echo '<div class="error">Some errors occurred:<br/>' . $errorMsg . '</div>';
}
?>
<?php if ($page == 3): ?>
<h2>Overview</h2>
<p>First entry: <?= $valueOne;?></p>
<p>Second Entry: <?= $valueTwo;?></p>
Reset
<?php elseif ($page == 2): ?>
<p>Entry from first Page: <?= $valueOne; ?></p>
<form method="post" action="<?= $_SERVER["PHP_SELF"] ?>">
Entry Two: <input type="text" name="fieldTwo" value="<?= $fieldTwo ?>" autofocus>
<br><br>
<input type="submit">
</form>
<?php else: ?>
<form method="post" action="<?= $_SERVER["PHP_SELF"] ?>">
<br><br>
Entry One: <input type="text" name="fieldOne" value="<?= $fieldOne; ?>" autofocus>
<br><br>
<input type="submit">
</form>
<?php endif; ?>
</body>
<html>
You can run the following command to test out the page without using a fancy tool like WAMP or LAMP.
php -S localhost:8000 index.php
You can now access in the browser at http://localhost:8000.
I am new to php and working on a hangman game. I have a home.php that takes you to the homepage and their is a login form that the user must submit a username and a password. If the username and password match with the one I have set, it will redirect to hangman.php. I want some advice if the way I have written the script is correct or not. Also, I am getting a 500 error after the user logs in. I don't know why. I will paste the code down below.
Update: I have added the code for hangman.php
home.php
<?php
// starting a new session
session_start();
if(isset($_POST['uname'], $_POST['psw'])){
$uname= "my_admin";
$psw = "password";
if($_POST['uname'] == $uname && $_POST['psw'] == $psw) {
$_SESSION["uname"] = "my_admin";
$_SESSION["psw"] = "password";
# array holds errors
$errors = array();
# validation starts here
if(empty($_POST['uname'])){
$errors['uname1'] = "Your name cannot be empty";
}
# check strlength
if(strlen($_POST['uname']) < 6){
$errors['uname2'] = "Must be longer than 6 characters";
}
# check username
if ($_POST['uname'] !== "my_admin"){
$errors['uname3'] = "You are not the admin";
}
if($_POST['uname'] == "my_admin" && $_POST['psw'] == "password"){
header('Location:hangman.php');
exit();
}else{
$errors['uname4'] = "Please try again";
}
if(empty($_POST['psw'])){
$errors['psw1'] = "Your password cannot be empty";
}
if(strlen($_POST['psw']) < 6){
$errors['psw2'] = "Must be longer than 6 characters";
}
if($_POST['psw'] !== "password"){
$errors['ps3'] = "AH AH AH thats not it";
}else{
header('Location:hangman.php');
exit();
}
if(count($errors) == 0){
# redirect to the game page
header('Location:hangman.php');
exit();
}
}
}
?>
form for my script to run against
<div class="container">
</p>
<label for="uname"><b>Username</b></label>
<input type="text" placeholder="Enter Username" name="uname">
<p>
<?php if(isset($errors['uname1']))
echo $errors['uname1']; ?>
</p>
<p>
<?php if(isset($errors['uname2']))
echo $errors['uname2']; ?>
</p>
<p>
<?php if(isset($errors['uname3']))
echo $errors['uname3']; ?>
</p>
<p>
<?php if(isset($errors['uname4']))
echo $errors['uname4']; ?>
</p>
<label for="psw"><b>Password</b></label>
<input type="password" placeholder="Enter Password" name="psw">
<p>
<?php if(isset($errors['psw1'])) echo $errors['psw1']; ?>
</p>
<p>
<?php if(isset($errors['psw2'])) echo $errors['psw2']; ?>
</p>
<?php if(isset($errors['psw3'])) echo $errors['psw3']; ?>
</p>
<button name="check" type="submit" value="submit">Login</button>
</div>
</form>
hangman.php
<?php
require_once 'hangedman.php';
$words = array('VIETNAM', 'PEOPLE', 'PYTHON');
$numwords = 0;
function printPage($image, $guesstemplate, $which, $guessed, $wrong) {
echo <<<ENDPAGE
<!DOCTYPE html>
<html>
<head>
<title>Hangman</title>
<link rel="stylesheet" type="text/css" href="home.css">
</head>
</html>
<body>
<h1 style='color: red'>Hangman Game</h1>
<br />
<pre style='color: red'>$image</pre>
<br />
<p style='color:red'><strong>Word to guess: $guesstemplate</strong></p>
<p style='color:red'>Letters used in guesses so far: $guessed</p>
<form method="post" action="$script">
<input type="hidden" name="wrong" value="$wrong" />
<input type="hidden" name="lettersguessed" value="$guessed" />
<input type="hidden" name="word" value="$which" />
<fieldset>
<legend style='color: red'>Your next guess</legend>
<input type="text" name="letter" autofocus />
<input type="submit" value="Guess" />
</fieldset>
</form>
</body>
ENDPAGE;
}
function loadWords() {
global $words;
global $numwords;
$input = fopen("./words.txt", "r");
while (true) {
$str = fgets($input);
if (!$str) break;
$words[] = rtrim($str);
$numwords++;
}
fclose($input);
}
function startGame() {
global $words;
global $numwords;
global $hang;
$which = rand(0, $numwords - 1);
$word = $words[$which];
$len = strlen($word);
$guesstemplate = str_repeat('_ ', $len);
$script = $_SERVER["PHP_SELF"];
printPage($hang[0], $guesstemplate, $which, "", 0);
}
function killPlayer($word) {
echo <<<ENDPAGE
<!DOCTYPE html>
<html>
<head>
<title>Hangman</title>
</head>
<body>
<h1>You lost!</h1>
<p>The word you were trying to guess was <em>$word</em>.</p>
</body>
</html>
ENDPAGE;
}
function congratulateWinner($word) {
echo <<<ENDPAGE
<!DOCTYPE html>
<html>
<head>
<title>Hangman</title>
</head>
<body>
<h1>You win!</h1>
<p>Congratulations! You guessed that the word was <em>$word</em>.</p>
</body>
</html>
ENDPAGE;
}
function matchLetters($word, $guessedLetters) {
$len = strlen($word);
$guesstemplate = str_repeat("_ ", $len);
for ($i = 0; $i < $len; $i++) {
$ch = $word[$i];
if (strstr($guessedLetters, $ch)) {
$pos = 2 * $i;
$guesstemplate[$pos] = $ch;
}
}
return $guesstemplate;
}
function handleGuess() {
global $words;
global $hang;
$which = $_POST["word"];
$word = $words[$which];
$wrong = $_POST["wrong"];
$lettersguessed = $_POST["lettersguessed"];
$guess = $_POST["letter"];
$letter = strtoupper($guess[0]);
if(!strstr($word, $letter)) {
$wrong++;
}
$lettersguessed = $lettersguessed . $letter;
$guesstemplate = matchLetters($word, $lettersguessed);
if (!strstr($guesstemplate, "_")) {
congratulateWinner($word);
} else if ($wrong >= 6) {
killPlayer($word);
} else {
printPage($hang[$wrong], $guesstemplate, $which, $lettersguessed, $wrong);
}
}
//header("Content-type: text/plain");
loadWords();
$method = $_SERVER["REQUEST_METHOD"];
if ($method == "POST") {
handleGuess();
} else {
startGame();
}
?>
I've been tasked to create a guessing game. A random number is generated and the user tries to guess it. It tells you if you should try a larger or a smaller number, and eventually the user guesses the correct number.
<?php
session_start();
if(empty($_SESSION['num_to_guess'])) { $_SESSION['num_to_guess'] = mt_rand(1,99); }
if (!isset($_POST['guess'])) {
$message = "Welcome to the Odd Number Guessing Game!";
}
elseif (!is_numeric($_POST['guess'])) { //is not numeric
$message = "I don't understand that response. Please enter a number.";
}
elseif ($_POST['guess'] == $_SESSION['num_to_guess']) { //matches
$message = "Well done! You've found the secret number. Now try to guess another.";
$_SESSION['num_to_guess'] = mt_rand(1,99);
}
elseif ($_POST['guess'] < $_SESSION['num_to_guess']) { //greater
$message = "Try a larger number!";
}
elseif ($_POST['guess'] > $_SESSION['num_to_guess']) { //lesser
$message = "Try a smaller number!";
}
else {
$message = "I'm terribly confused.";
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Odd Number Guessing Machine!</title>
</head>
<body>
<h1><?php echo $message; ?>
<?php echo $_SESSION['num_to_guess']; ?>
</h1>
<form action = "<?php echo $_SERVER['PHP_SELF']; ?>" method = "POST">
<p><label for="guess">Try to guess an odd number between 1 and 99:</label> <br/>
<input type="text" id="guess" name="guess" /></p>
<button type="submit" name="submit" value="submit">Submit</button>
</form>
</body>
</html>
My problem is the form reloads every time the user submits the data, thereby changing the random number. I'm sure there is a workaround but I just can't seem to find it.
I want to generate a new number ONLY when the correct number is guessed. I tried adding rand() function on the elseif loop where the number is guessed correctly, but that doesn't work.
Please help. :)
Now browser compatible
<?php
session_start();
$url_of_page = $_SERVER['REQUEST_URI'];
if(!isset($_SESSION['correct_number'])){
// Create random number only when the previous one has been correctly guessed
$number_to_guess = rand(0,9);
$_SESSION['correct_number'] = $number_to_guess;
}
if(isset($_SESSION['correct_number'])){
$num_to_guess = $_SESSION['correct_number'];
}
if(isset($_POST['guess'])){
$guessed_number = trim($_POST['guess']);
$reg_exp = '/^([0-9]+)$/';
$reg_exp_match = preg_match($reg_exp,$guessed_number);
}
if(isset($_POST['submit'])){
if(isset($reg_exp_match)){
if(!$reg_exp_match){
$message = "Enter a number";
}else{
if($guessed_number < $num_to_guess){
// is small
$message = "Try a larger number!";
}elseif($guessed_number > $num_to_guess){
// is large
$message = "Try a smaller number!";
}elseif($guessed_number == $num_to_guess){
//matches
$message = "Well done...You got it";
$new_game = TRUE;
unset($_SESSION['correct_number']);
// A new number can now be created
}
}
}
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Odd Number Guessing Machine!</title>
</head>
<body>
<h3>Welcome to the Guessing Machine!</h3>
<p>
<?php
if(isset($new_game) && ($new_game == TRUE)){ // The correct number
if(isset($message) && isset($url_of_page)){
echo $message . '. Start a new game';
}
}else{ // Not the correct number
if(isset($message)){ echo $message; }
}
?>
</p>
<form action="<?php if(isset($url_of_page)){ echo $url_of_page; } ?>" method="POST">
<p>
<label for="guess">Enter a number, 0 to 9:</label> <br/>
<input type="text" id="guess" name="guess" />
</p>
<button type="submit" name="submit" value="submit">Submit</button>
</form>
</body>
</html>
This is a random number guessing game between 1 and 100.
I am stuck on the guessing number part. The code doesn't work, whatever number I put it just show me the message "Your number is lower!".I need help.
This is what I have so far.
<?php
$x = rand(1, 100);
$num = '';
if (isset($_POST['submit'])) {
if ($num < $x)
{
echo " Your number is lower! <br />";
} elseif ($num > $x)
{
echo " Your number is higher! <br />";
} elseif ($num == $x)
{
echo " Congratulations! You guessed the hidden number. <br />";
} else
{
echo " You never set a number! <br />";
}
}
?>
<p>
<form action="" method="post">
<input type="text" name="num">
<button type="submit" name="submit">Guess</button>
<button type="reset" name="Reset">Reset</button>
</form>
</p>
You will always get lower because There isn't any value inside you $num.So, You need to assigning $num
<?php
$x = rand(1, 100);
$num = '';
if (isset($_POST['submit'])) {
$num = $_POST['num']; // Add this to set value for $num variable
if ($num < $x)
{
echo " Your number is lower! <br />";
} elseif ($num > $x)
{
echo " Your number is higher! <br />";
} elseif ($num == $x)
{
echo " Congratulations! You guessed the hidden number. <br />";
} else
{
echo " You never set a number! <br />";
}
}
?>
You need to set the num after submit the form.
if (isset($_POST['submit'])) {
$num = $_POST['num'];
if ($num < $x)
{
echo " Your number is lower! <br />";
} elseif ($num > $x)
{
echo " Your number is higher! <br />";
} elseif ($num == $x)
{
echo " Congratulations! You guessed the hidden number. <br />";
} else
{
echo " You never set a number! <br />";
}
}
// value of $x is in between 1 and 100 means greater than 0 and lesser than 101
$x = rand(1, 100);
// $num value is empty and while you attempt to compare with this this will converted to zero
$num = '';
// thus $num<$x always returns true, thats the mistake you need to assign the submitted value to the $num variable like
$num=$_POST['num'];
// put above line just before the if($num<$x)
This would be a lot easier if you had it as a switch/case statement:
$x = rand(1,1000);
if(isset($_POST['submit'])) {
$num = $_POST['num'];
switch($num) {
case ($num < $x):
echo " Your number is lower! <br />";
break;
case ($num > $x):
echo " Your number is higher! <br />";
break;
case ($num == $x):
echo " Congratulations! You guessed the hidden number. <br />";
break;
case '':
echo " You never set a number! <br />";
break;
}
}
Example/Demo
You have set $num = '' (a fix empty string) and compare it with a random generated number. It's obvious that this can not work. You have to read $_POST['num'] in PHP.
This will work, however, not as probably expected. You will need to either store the random number in a session or easier add a hidden field to the form. Otherwise the random number will change on each try.
on 22.6.2021 i wrote a Guess Number in Range [0 .. aMaxIntValue] sample Web Application using PHP.
i think the following code may help you.
the code is kept in a Single PHP file.
it generates #4 HTML pages ...
the 1st initial page is used to collect application parameters (e.g. the Max Int Number to Guess)
the 2nd page is the Main Play Game Page where the user is asked to Guess the Secret Number or to Reset Game. this page shows the previous user guesses and some tips for the user about the guess
the 3rd page is used to notify the user looses game (that is he has no more tries left)
the 4th page is used to notify the user wins the game (that is the Guess was OK)
the Number of Tries left to the User is computed using the values range [0 .. max]
the Secret Number to Guess is a random generated integer number
this is the PHP + HTML code ...
<? php ?>
<? php ?>
<?php
session_start();
error_reporting (E_PARSE | E_COMPILE_ERROR);
function ResetGame()
{
unset ( $_SESSION['theMaxNumber'] );
}
function InitGame()
{
$_SESSION['theNumberToGuess'] = mt_rand (0, $_SESSION['theMaxNumber']);
$_SESSION['theMaxNumberOfTries'] = floor ( log ($_SESSION['theMaxNumber'], 2) ) + 1;
$_SESSION['theUserTriesCount'] = 0;
$_SESSION['thePrevGuessesString'] = '';
$_SESSION['theUserGuess'] = 0;
}
function ComputeNumberOfTriesLeft()
{
return $_SESSION['theMaxNumberOfTries'] - $_SESSION['theUserTriesCount'];
}
function IsNoMoreTriesLeft()
{
return ComputeNumberOfTriesLeft() <= 0;
}
$aCanPlayGame = false;
$aUserSubmittedGuess = false;
$aIsNoMoreTriesLeft = false;
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if ( isset ($_REQUEST['playgame']) ) {
$_SESSION['theMaxNumber'] = intval($_REQUEST['theMaxNumber']);
// init game ...
InitGame();
$aCanPlayGame = true;
}
elseif ( isset ($_REQUEST['submituserguess']) ) {
$aCanPlayGame = true;
$aUserSubmittedGuess = true;
$_SESSION['theUserGuess'] = intval($_REQUEST['theUserGuess']);
}
elseif ( isset ($_REQUEST['resetgame']) ) {
ResetGame();
}
else {
ResetGame();
}
}
else {
ResetGame();
}
// check a play
$aUserShouldTryLower = false;
$aUserShouldTryHigher = false;
$aUserWins = false;
$aUserLooses = false;
if ($aCanPlayGame) {
$aIsNoMoreTriesLeft = IsNoMoreTriesLeft();
if ( ! $aIsNoMoreTriesLeft ) {
// user have tries left
if ($aUserSubmittedGuess) {
// check user guess ...
$aUserGuess = intval($_SESSION['theUserGuess']);
if ( $aUserGuess > $_SESSION['theNumberToGuess'] ) {
$aUserShouldTryLower = true;
}
elseif ( $aUserGuess < $_SESSION['theNumberToGuess'] ) {
$aUserShouldTryHigher = true;
}
else {
$aUserWins = true;
// also reset game
ResetGame();
}
// add the current guess to the prev guesses string
$_SESSION['thePrevGuessesString'] .= $_SESSION['theUserGuess'] . ' ';
// increase the user tries count
++ $_SESSION['theUserTriesCount'];
// check tries count
if ( ! $aUserWins ) {
$aIsNoMoreTriesLeft = IsNoMoreTriesLeft();
if ($aIsNoMoreTriesLeft) {
// this was the last try
// no more tries left
$aUserLooses = true;
// also reset game
ResetGame();
}
}
}
}
else {
// no more tries left
$aUserLooses = true;
// also reset game
ResetGame();
}
}
?>
<?php if ($aUserLooses): ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>Sorry, you loose the game</p>
<p>the Number to Guess was <?php echo $_SESSION['theNumberToGuess']; ?></p>
<form method="post">
<input type="submit" name="resetgame" value="reset game">
</form>
</body>
</html>
<?php elseif ($aUserWins): ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>Congrats, you Win the Game</p>
<p>the Number to Guess was <?php echo $_SESSION['theNumberToGuess']; ?></p>
<form method="post">
<input type="submit" name="resetgame" value="reset game">
</form>
</body>
</html>
<?php elseif ($aCanPlayGame): ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>the Max Number is <?php echo $_SESSION['theMaxNumber']; ?></p>
<p>Guess a Number in the Range [ 0 .. <?php echo ($_SESSION['theMaxNumber']); ?> ]</p>
<p>[DEBUG] the secret number to guess is <?php echo $_SESSION['theNumberToGuess']; ?></p>
<p>you have <?php echo ComputeNumberOfTriesLeft(); ?> tries left</p>
<form method="post">
<label for="theUserGuess">Enter your Guess: </label>
<input type="text" id="theUserGuess" name="theUserGuess">
<input type="submit" name="submituserguess" value="Guess">
<input type="submit" name="resetgame" value="reset game">
</form>
<p>Prev Guesses: <?php echo $_SESSION['thePrevGuessesString']; ?> </p>
<p>
<?php
if ($aUserShouldTryLower) {
echo 'you should try a lower < guess';
}
elseif ($aUserShouldTryHigher) {
echo 'you should try a higher > guess';
}
else {
echo 'no guess';
}
?>
</p>
</body>
</html>
<?php else: ?>
<!DOCTYPE html>
<html>
<head>
<title>Guess a Number</title>
</head>
<body>
<p>Guess a Number from (0) to ... </p>
<form method="post">
<input id="theMaxNumber" name="theMaxNumber">
<input type="submit" name="playgame" value="play game">
</form>
</body>
</html>
<?php endif; ?>
<? php ?>
that's all folks ...
The PHP script below is for a number-guessing game. A hidden field is used to store the number of guesses, represented by the variable $tries. No matter how I tried, the number of guess ($tries) never increment. Could someone tell me what is wrong with the code please?
Maria
<?php
$num=21;
$tries=(isset($_POST['guess'])) ? $tries+1: 0;
if (!isset($_POST['guess'])) {
$message="Welcome to the Guessing Game!";
} elseif (!is_numeric($_POST['guess'])) {
$message="You need to type in a number.";
} elseif ($_POST['guess']==$num) {
$message="You WON 1 million point!";
} elseif ($_POST['guess']>$num) {
$message="Try a smaller number";
} else {
$message="Try a bigger number";
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Guessing Game</title>
</head>
<body>
<h1><?php echo $message; ?></h1>
<p><strong>Guess number: </strong><?php echo $tries; ?></p>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
<p><label for="guess">Type your guess here:</label><br/>
<input type="text" id="guess" name="guess" />
<input type="hidden" name="tries" value="<?php echo $tries; ?>"/></p>
<button type="submit" name="submit" value="submit">Submit</button>
</form>
</body>
</html>
Change:
$tries=(isset($_POST['guess'])) ? $tries+1: 0;
To:
$tries=(isset($_POST['tries'])) ? $_POST['tries']+1: 0;
Or, depending on the condition, only increment when a guess exists, then:
$tries=(isset($_POST['guess'])) ? $_POST['tries']+1: 0;
But doing it based on guess will allow the person to reset the counter by not entering a number ;)
$tries is not defined when you are trying to increment it. However it is availabe in $_POST
$tries=(isset($_POST['guess'])) ? $tries+1: 0;
// Change to
$tries=(isset($_POST['guess'])) ? $_POST['tries']+1: 0;