I've written the function as such and now it returns "You are running a comprehensive ad campaign" even if I select no boxes or just one or two. I'm assuming the problem is in the if statement, do I need to run isset twice?
function adMix () {
$tv = (isset($_POST['TV']));
$radio = (isset($_POST['Radio']));
$search = (isset($_POST['Search']));
$mobile = (isset($_POST['Mobile']));
$mail = (isset($_POST['Mail']));
if ($tv || $radio || $search || $mobile || $mail) {
echo "You are running a comprehensive ad campaign.";
} else {
echo "You can do more to market your dealership.";
}
}
function adMix () {
if (isset($_POST['Tv']) || isset($_POST['Radio']) || isset($_POST['Search']) || isset($_POST['Mobile']) || isset($_POST['Mail'])) {
$tv = isset($_POST['Tv'])?$_POST['Tv']:""; //You can access the index only if it's set, else you will be shown a notice
$radio = isset($_POST['Radio'])?$_POST['Radio']:"";
$search = isset($_POST['Search'])?$_POST['Search']:"";
$mobile = isset($_POST['Mobile'])?$_POST['Mobile']:"";
$mail = isset($_POST['Mail'])?$_POST['Mail']:"";
echo "You are running a comprehensive ad campaign.";
} else {
echo "You can do more to market your dealership.";
}
}
Try making the checkboxes behave as an array, renaming them all to mktg[], per example:
<p>Marketing Mix:</p>
<input type="checkbox" name="mktg[]" value="TV">TV<br>
<input type="checkbox" name="mktg[]" value="Radio">Radio<br>
<input type="checkbox" name="mktg[]" value="Search">Search<br>
<input type="checkbox" name="mktg[]" value="Mobile">Mobile<br>
<input type="checkbox" name="mktg[]" value="Mail">Direct Mail<br>
<br>
And the function:
function adMix(){
if($_POST){
if(!empty($_POST['mktg'])){
if(count($_POST['mktg'])) echo "You are running a comprehensive ad campaign.";
}else echo "You can do more to market your dealership.";
}
}
This way, if(count($_POST['mktg'])) verifies if any option was checked and returns true. If you need to define how many options must be selected to the campaing be true, let's say 3, just do this:
if(count($_POST['mktg']) >= 3)
try with this:
function adMix () {
#$tv = $_POST['TV'];
#$radio = $_POST['Radio'];
#$search = $_POST['Search'];
#$mobile = $_POST['Mobile'];
#$mail = $_POST['Mail'];
if (isset($tv) || isset($radio) || isset($search) || isset($mobile) || isset($mail)) {
echo "You are running a comprehensive ad campaign.";
} else {
echo "You can do more to market your dealership.";
}
}
Related
My code should provide two random numbers and have the user enter their product (multiplication).
If you enter a wrong answer, it tells you to guess again, but keeps the same random numbers until you answer correctly. Answer correctly, and it starts over with a new pair of numbers.
The below code changes the value of the two random numbers even if I entered the wrong number. I would like to keep the values the same until the correct answer is entered.
<?php
$num1=rand(1, 9);
$num2=rand(1, 9);
$num3=$num1*$num2;
$num_to_guess = $num3;
echo $num1."x".$num2."= <br>";
if ($_POST['guess'] == $num_to_guess)
{ // matches!
$message = "Well done!";
}
elseif ($_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
{ // some other condition
$message = "I am terribly confused.";
}
?>
<!DOCTYPE html>
<html>
<body>
<h2><?php echo $message; ?></h2>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<input type="hidden" name="answer" value="<?php echo $answer;?>">
<input type="hidden" name="expression" value="<?php echo $expression;?>">
What is the value of the following multiplication expression: <br><br>
<?php echo $expression; ?> <input type="text" name="guess"><br>
<input type="submit" value="Check">
</form>
</body>
</html>
In order to keep the same numbers, you have to store them on the page and then check them when the form is submitted using php. You must also set the random number if the form was never submitted. In your case, you were always changing num1 and num2. I tried to leave as much of your original code intact, but it still needs some work to simplify it.
First I added 2 more hidden field in the html called num1 and num2
Second, I set $num1 and $num2 to the value that was submitted from the form.
After following the rest of the logic, I make sure that $num1 and $num2 are reset if the answer is correct of it the form was never submitted.
You can see the comments in the code below.
Additionally, if you were going to use this in a production environment, you would want to validate the values being passed in from the form so that malicious users don't take advantage of your code. :)
<?php
// Setting $num1 and $num2 to what was posted previously and performing the math on it.
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
$num_to_guess = $num1*$num2;
// Check for the correct answer
if ($_POST && $_POST['guess'] == $num_to_guess)
{
// matches!
$message = "Well done!";
$num1=rand(1, 9);
$num2=rand(1, 9);
}
// Give the user a hint that the number is too big
elseif ($_POST['guess'] > $num_to_guess)
{
$message = $_POST['guess']." is too big! Try a smaller number.";
}
// Give the user a hint that the number is too small
elseif ($_POST['guess'] < $num_to_guess)
{
$message = $_POST['guess']." is too small! Try a larger number.";
}
// If the form wasn't submitted i.e. no POST or something else went wrong
else
{
// Only display this message if the form was submitted, but there were no expected values
if ($_POST)
{
// some other condition and only if something was posted
$message = "I am terribly confused.";
}
// set num1 and num2 if there wasn't anything posted
$num1=rand(1, 9);
$num2=rand(1, 9);
}
// Show the problem
echo $num1."x".$num2."= <br>";
?>
<!DOCTYPE html>
<html>
<body>
<h2><?php echo $message; ?></h2>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<input type="hidden" name="num1" value="<?= $num1 ?>" />
<input type="hidden" name="num2" value="<?= $num2 ?>" />
<input type="hidden" name="answer" value="<?php echo $num3;?>">
<input type="hidden" name="expression" value="<?php echo $expression;?>">
What is the value of the following multiplication expression: <br><br>
<input type="text" name="guess"><br>
<input type="submit" value="Check">
</form>
</body>
</html>
When you load the page for the first time, you have (i.e.) “2*3” as question. $_POST is not defined, so if ($_POST['guess']... will produce a undefined index warning. Then you echo $message, but where you define $message? $_POST['guess'] is undefined, so is evaluated as 0, $num_to_guess is 6 (=2*3), so $message is set to " is too small! Try a larger number.", even if the user has not input anything. The hidden answer is set to $answer, but this variable is not defined so it is set to nothing (or to “Notice: Undefined variable: answer”, if you activate error reporting). Same issue for expression input and for echo $expression.
Try something like this:
$newQuestion = True; // This variable to check if a new multiplication is required
$message = '';
/* $_POST['guess'] check only if form is submitted: */
if( isset( $_POST['guess'] ) )
{
/* Comparison with answer, not with new result: */
if( $_POST['guess'] == $_POST['answer'] )
{
$message = "Well done!";
}
else
{
/* If result if wrong, no new question needed, so we propose same question: */
$newQuestion = False;
$answer = $_POST['answer'];
$expression = $_POST['expression'];
if( $_POST['guess'] > $_POST['answer'] )
{
$message = "{$_POST['guess']} is too big! Try a smaller number.";
}
else
{
$message = "{$_POST['guess']} is too small! Try a larger number.";
}
}
}
/* New question is generated only on first page load or if previous answer is ok: */
if( $newQuestion )
{
$num1 = rand( 1, 9 );
$num2 = rand( 1, 9 );
$answer = $num1*$num2;
$expression = "$num1 x $num2";
if( $message ) $message .= "<br>Try a new one:";
else $message = "Try:";
}
?>
<!DOCTYPE html>
(... Your HTML Here ...)
This might also be fun to learn. This is a session. Lets you store something temporarily. It is a little dirty. But fun to learn from.
http://www.w3schools.com/php/php_sessions.asp
<?php
session_start(); // Starts the Session.
function Save() { // Function to save $num1 and $num2 in a Session.
$_SESSION['num1'] = rand(1, 9);
$_SESSION['num2'] = rand(1, 9);
$_SESSION['num_to_guess'] = $_SESSION['num1']*$_SESSION['num2'];;
$Som = 'Guess the number: ' . $_SESSION['num1'] .'*' .$_SESSION['num2'];
}
// If there is no session set
if (!isset($_SESSION['num_to_guess'])) {
Save();
$message = "";
}
if (isset($_POST['guess'])) {
// Check for the correct answer
if ($_POST['guess'] == $_SESSION['num_to_guess']) {
$message = "Well done!";
session_destroy(); // Destroys the Session.
Save(); // Set new Sessions.
}
// Give the user a hint that the number is too big
elseif ($_POST['guess'] > $_SESSION['num_to_guess']) {
$message = $_POST['guess']." is too big! Try a smaller number.";
$Som = 'Guess the number: ' . $_SESSION['num1'] .'*' .$_SESSION['num2'];
}
// Give the user a hint that the number is too small
elseif ($_POST['guess'] < $_SESSION['num_to_guess']) {
$message = $_POST['guess']." is too small! Try a larger number.";
$Som = 'Guess the number: ' . $_SESSION['num1'] .'*' .$_SESSION['num2'];
}
// some other condition
else {
$message = "I am terribly confused.";
}
}
?>
<html>
<body>
<h2><?php echo $Som . '<br>'; ?>
<?php echo $message; ?></h2>
<form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<input type="text" name="guess"><br>
<input type="submit" value="Check">
</form>
</body>
</html>
Need som serious help!
<?php
$php1 = !isset($_GET['php1']);
$php2 = !isset($_GET['php2']);
$php3 = !isset($_GET['php3']);
$php4 = !isset($_GET['php4']);
$php5 = !isset($_GET['php5']);
if ($php1 == 'one' && $php2 == 'two' && $php5 == 'five') {
echo "<h2>R</h2>WRONG";
} else {
echo "<h2>R</h2>CORRECT";
}
?>
HTML
<form action="One.php" method="get">
<input type="checkbox" name="php1" value="one"> q1<br>
<input type="checkbox" name="php2" value="two"> q1<br>
<input type="checkbox" name="php3" value="three"> q1<br>
<input type="checkbox" name="php4" value="four"> q1<br>
<input type="checkbox" name="php5" value="five"> q1<br>
<br>
<input type="submit" value="Send!">
</form>
If all checkboxes are empty, there will be a message saying that. How do I do it?
If I dont check any boxes, it tells me the answers are correct. That's wrong.
<?php
If(isset($_GET['php1'])){
$php1 = 1;
}else{
$php1 = 0;
}
If(isset($_GET['php2'])){
$php2 = 1;
}else{
$php2 = 0;
}
If(isset($_GET['php3'])){
$php3 = 1;
}else{
$php3 = 0;
}
If(isset($_GET['php4'])){
$php4 = 1;
}else{
$php4 = 0;
}
If(isset($_GET['php5'])){
$php5 = 1;
}else{
$php5 = 0;
}
if ($php1 && $php2 && $php5) {
echo "<h2>Resultat</h2>Du svarade rätt på frågan";
} else {
echo "<h2>Resultat</h2>Du svarade fel på frågan";
}
Try this.
Each php variable will have the value of 1 or 0 (true/false). Thus the if only needs to check it if it is or not.
You have to remember that UN-CHECKED Checkboxes are not even sent to the PHP script $_POST/$_GET by the browser.
So there existance is normally all you need to know.
First you must check that they were passed to the script and then check its value, otherwise you will receive undefined index errors for each checkbox that was not checked by the user
if (isset($_GET['php1']) && $_GET['php1'] != '' ) {
Although as the checkbox called php1 can only be set to the value you give it, its value can be assumed and all you need to do is
if (isset($_GET['php1']) ) {
// php1 was checked
Also isset() will test more than one variable exists using an AND. So you could write your code as
if ( isset($_GET['php1'], $_GET['php2'], $_GET['php5']) ) {
echo "<h2>Resultat</h2>Du svarade rätt på frågan";
} else {
echo "<h2>Resultat</h2>Du svarade fel på frågan";
}
$php1 = !isset($_GET['php1']);
This means $php1 is either true or false. If you want the value of php1 get parameter then remove isset cover, just
$_GET['php1'];
isset is used to check whether the variable exist or not after that use $_GET['php1'];
I will admit immediately that this is homework. I am only here as a last resort after I cannot find a suitable answer elsewhere. My assignment is having me pass information between posts without using a session variable or cookies in php. Essentially as the user continues to guess a hidden variable carries over all the past guesses up to that point. I am trying to build a string variable that holds them all and then assign it to the post variable but I cannot get anything to read off of the guessCounter variable i either get an undefined index error at the line of code that should be adding to my string variable or im just not getting anything passed over at all. here is my code any help would be greatly appreciated as I have been at this for awhile now.
<?php
if(isset($_POST['playerGuess'])) {
echo "<pre>"; print_r($_POST) ; echo "</pre>";
}
?>
<?php
$wordChoices = array("grape", "apple", "orange", "banana", "plum", "grapefruit");
$textToPlayer = "<font color = 'red'>It's time to play the guessing game!(1)</font>";
$theRightAnswer= array_rand($wordChoices, 1);
$passItOn = " ";
$_POST['guessCounter']=$passItOn;
$guessTestTracker = $_POST['guessCounter'];
$_POST['theAnswer'] = $theRightAnswer;
if(isset($_POST['playerGuess'])) {
$passItOn = $_POST['playerGuess'];
if ($_SERVER['REQUEST_METHOD'] == 'GET') {
$guessTestTracker = $_GET['guessCounter'];
$theRightAnswer = $_GET['theAnswer'];
}
else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if(isset($_POST['playerGuess'])) {
if(empty($_POST['playerGuess'])) {
$textToPlayer = "<font color = 'red'>Come on, enter something(2)</font>";
}
else if(in_array($_POST['playerGuess'],$wordChoices)==false) {
$textToPlayer = "<font color = 'red'>Hey, that's not even a valid guess. Try again (5)</font>";
$passItOn = $_POST['guessCounter'].$passItOn;
}
if(in_array($_POST['playerGuess'],$wordChoices)&&$_POST['playerGuess']!=$wordChoices[$theRightAnswer]) {
$textToPlayer = "<font color = 'red'>Sorry ".$_POST['playerGuess']." is wrong. Try again(4)</font>";
$passItOn = $_POST['guessCounter'].$passItOn;
}
if($_POST['playerGuess']==$wordChoices[$theRightAnswer]) {
$textToPlayer = "<font color = 'red'>You guessed ".$_POST['playerGuess']." and that's CORRECT!!!(3)</font>";
$passItOn = $_POST['guessCounter'].$passItOn;
}
}
}
}
$_POST['guessCounter'] = $passItOn;
$theRightAnswer=$_POST['theAnswer'];
for($i=0;$i<count($wordChoices);$i++){
if($i==$theRightAnswer) {
echo "<font color = 'green'>$wordChoices[$i]</font>";
}
else {
echo $wordChoices[$i];
}
if($i != count($wordChoices) - 1) {
echo " | ";
}
}
?>
<h1>Word Guess</h1>
Refresh this page
<h3>Guess the word I'm thinking</h3>
<form action ="<?php echo $_SERVER['PHP_SELF']; ?>" method = "post">
<input type = "text" name = "playerGuess" size = 20>
<input type = "hidden" name = "guessCounter" value = "<?php echo $guessTestTracker; ?>">
<input type = "hidden" name = "theAnswer" value = "<?php echo $theRightAnswer; ?>">
<input type = "submit" value="GUESS" name = "submitButton">
</form>
<?php
echo $textToPlayer;
echo $theRightAnswer;
echo $guessTestTracker;
?>
This is a minimal functional example of what you need to do. There are still a couple of minor bugs (like duplicate entries in the history), but I've left these as an exercise for you. Treat this as a starting point and build up what you need from it.
I've added comments to explain what's happening, so hopefully it is clear to you.
$answer = null;
$history = [];
$choices = ['apple', 'grape', 'banana'];
$message = '';
// check if a guess has been made.
if (!empty($_POST) && !empty($_POST['guess'])) {
// check if previous guesses have been made.
if (!empty($_POST['history'])) {
$history = explode(',', $_POST['history']);
}
// check guess.
if (!empty($_POST['answer']) && !empty($_POST['guess'])) {
// check guess and answer are both valid.
if (in_array($_POST['guess'], $choices) && isset($choices[$_POST['answer']])) {
if ($_POST['guess'] == $choices[$_POST['answer']]) {
// correct; clear history.
$history = [];
$message = 'correct!';
} else {
// incorrect; add to history and set previous answer to current.
$history[] = $_POST['guess'];
$answer = $_POST['answer'];
$message = 'incorrect!';
}
} else {
// invalid choice or answer value.
}
}
}
if (empty($answer)) {
// no answer set yet (new page load or correct guess); create new answer.
$answer = rand(0, count($choices) - 1);
}
?>
<p>Guess the word I'm thinking:</p>
<p><?php echo implode(' | ', $choices) ?></p>
<form method="POST">
<input type="hidden" name="answer" value="<?php echo $answer; ?>">
<input type="hidden" name="history" value="<?php echo implode(',', $history); ?>">
<input type="text" name="guess">
<input type="submit" name="submit" value="Guess">
</form>
<p><?php echo $message; ?></p>
I have a little mailing form with a few checkboxes. At least one of the boxes need to be selected before mailing should start.
My HTML:
<input type='checkbox' id='part1' name='box1' value='box1' checked>
<label for="part1">Voor Leden agenda</label>
<br/>
<input type='checkbox' id='part2' name='box2' value='box2' checked>
<label for="part2">Voor Leiding agenda</label>
<br/>
<input type='checkbox' id='part3' name='box3' value='box3' checked>
<label for="part3">Verhuur agenda</label>
<br/>
<button type='submit' name='send'/>send</button>
My PHP:
if (isset($_POST['box1'])) {
$box1 = 'yes';
} else {
$box1 = 'No';
}
if (isset($_POST['box2'])) {
$box2 = 'yes';
} else {
$box2 = 'No';
}
if (isset($_POST['box3'])) {
$box3 = 'yes';
} else {
$box3 = 'No';
}
i would like to have a script that gives a message like below if no checkbox is selected:
if()
{
echo "<p class='redfont'>no checkboxes are selected</p>";
echo "<p><a href='javascript:history.back();'>Click to go back</a></p>";
}
edit: how can I give this message with php, only if all boxes are unchecked
if(!isset($_POST['box1']) && !isset($_POST['box2']) && !isset($_POST['box3']))
{
// none is set
}
You could even apply De Morgan's law and write this equivalent expression
if(isset($_POST['box1']) || isset($_POST['box2']) || isset($_POST['box3']))
{
// at least one of them is set
}
You could even send those 3 parameters to 1 isset call but then that would check if all of them are set, which is not your requirement.
Try this:
if(isset($_POST["box1"]) || isset($_POST["box2"]) || isset($_POST["box3"])) {
if(isset($_POST['box1'])) {
$box1 = 'yes';
} else {
$box1 = 'No';
}
if(isset($_POST['box2'])) {
$box2 = 'yes';
} else {
$box2 = 'No';
}
if(isset($_POST['box3'])) {
$box3 = 'yes';
} else {
$box3 = 'No';
}
} else {
echo "<p class='redfont'>no checkboxes are selected</p>";
echo "<p><a href='javascript:history.back();'>Click to go back</a></p>";
}
This one is more readable I think:
$boxes = ['box1', 'box2', 'box3'];
$checked = [];
foreach($boxes as $box){
if(isset($_POST[$box])){
$checked[] = $box;
}
}
if(count($checked) == 0){
// no boxes checked
echo "<p class='redfont'>no checkboxes are selected</p>";
echo "<p><a href='javascript:history.back();'>Click to go back</a></p>";
}else{
// at least one box is checked, you can do another foreach statement
with the $checked variable to do stuff with the checked ones
}
To do this for ANY number of checkboxes (Webistes are bound to expand), I assume all of you checkboxes are of the form box**i** :
if( strpos( implode(',' , array_keys($test)) , 'box' ) !== FALSE )
I use this function in JQuery:
jQuery.validation = function(){
var verif = 0;
$(':checkbox[id=list_exp]').each(function() {
if(this.checked == true){
verif++
}
});
if(verif == 0){
alert("no checkboxes are selected");
return false;
}
}
In my form I am trying to get the radio checked value to be passed on to the next page (which is an FPDF page)
I have 4 options: Annual Leave, Sick Leave, Business Leave, & also others with a textfield.
However I have tried a lot of 'if' as well as 'switch cases'
I am getting either only the element with value '1'
or else 'Undefined index: rad in D:\xampp\htdocs\Application\generate_report.php on line 13'
some where I am wrong, can anyone help me please. My code below.
html form:
<form id="formmain" method="post" action="generate_report.php" onsubmit="return_validate()">
<script type="text/javascript">
function selectRadio(n){
document.forms["form4"]["r1"][n].checked=true
}
</script>
<table width="689">
<tr>
<td width="500d">
<input type="radio" name="rad" value="0" />
<label>Business Trip</label>
<input type="radio" name="rad" value="1"/><label>Annual Leave</label>
<input type="radio" name="rad" value="2"/><label>Sick Leave</label>
<input type="radio" name="rad" value="3"/><label>Others</label> <input type="text" name="others" size="25" onclick="selectRadio(3)" />
</td>
</tr>
</table>
//....
//below submit button is end of the html page:
<input type="submit" name="submit" value="send" />
</form>
Generate PDF form:
$radio = $_POST['rad']; // I am storing variable
if($radio = 0) {
$type = 'Business Leave';
}elseif ($radio = 1) {
$type = 'Annual Leave';
}elseif ($radio = 2) {
$type = 'Sick Leave';
} else { $type = $_POST['others']; }
//echo
$pdf->Cell(98,10, 'Reason | ' .$type , 1, 0, 'C', $fill);
if($radio = 0)
and
elseif ($radio = 1)
and all the other elseifs have to be == 1, with two '='!
A further explanation on the OP. If you do not use == then you are setting the value, not checking it. Furthermore, there are levels of checking. Using the double equals (==) is effectively stating "is equal to" whereas using triple equals (===) is like stating "is absolutely equal to". Generally the == operator will do everything you need but sometimes when working with data types or specific values you might need ===. This is mostly FYI as the OP has an actionable solution.
You should always check if inputs are checked or any value inserted. If there's no value, then it throws an undefined index error. Also, you should replace =s to == in your if clauses. So:
PHP:
$radio = $_POST['rad']; // I am storing variable
if (isset($radio)) { // checks if radio is set
if($radio == 0) {
$type = 'Business Leave';
}elseif ($radio == 1) {
$type = 'Annual Leave';
}elseif ($radio == 2) {
$type = 'Sick Leave';
} else {
if (isset($_POST['others'])) { // cheks if input text is set
$type = $_POST['others'];
}
else {
echo 'Error';
}
}
//echo
$pdf->Cell(98,10, 'Reason | ' .$type , 1, 0, 'C', $fill);
}
else {
echo 'Error';
}
Now it should work.