Using submit button to send data to PHP script

Question

I'm making a math quiz where the user inputs their answer choice using radio buttons. I want to take the value of the radio button and compare it with the actual answer and increment score if the answer is correct.

At the moment, we are using a submit button at the bottom of the quiz where we are trying to send the data for the "check answers" script. However, I don't think any data is being pulled correctly.

Here is the code for the radio button which is from a form called "mathselect.php"

<?php //php starts here
require("opendbomath.php");
global $link, $DBname ;
if (!empty($_GET)) {
    $category = $_GET["category"];
   $sql = "SELECT * FROM `math`"; 
   $result = mysqli_query($link,$sql);
   $numOfQuestions = "SELECT COUNT(*) FROM `math`"; 
   $queryNumOfQuestions = mysqli_query($link,$numOfQuestions);
   if ($queryNumOfQuestions=mysqli_query($link,$sql))
{
    // Return the number of rows in database
    $rowcount=mysqli_num_rows($queryNumOfQuestions); //this is number of total rows
    printf("Result set has %d rows.\n<br><br>",$rowcount);
}
$list = array();
$questionNumber = 0;

while (count($list) < 10){
    do { //this is where we pull questions from database
    $randomInt = rand(2,$rowcount); //random int is inbetween 2 and       numbers of rows
    $sqlselect = "SELECT * FROM `math` WHERE `bid` =  \"" . $randomInt   . "\" AND `acategory` = \"" . $category . "\"  ";
    $sqlSelectQuery = mysqli_query($link,$sqlselect);
    $numOfGoodQuestions = mysqli_num_rows($sqlSelectQuery);
    } while ($numOfGoodQuestions == 0); //if it returns blank field, it will loop again

    if (in_array($randomInt,$list)){ //if it pulls duplicate number, continue
        continue;
        } 
    else {
        //use fetch function
        $row=mysqli_fetch_array($sqlSelectQuery);
        $questionNumber = $questionNumber + 1;
        $strQuestionNumber = (string)$questionNumber;
        $slots = array();
        array_push($slots,$row['aanswer']); //pushes answer choices into slots array
        array_push($slots,$row['awrong1']);
        array_push($slots,$row['awrong2']);
        array_push($slots,$row['awrong3']);
        shuffle($slots); //shuffles the answer choices
?>
<form action="mathcheck.php" method="post">
<?php
print ("<input type = 'radio' name='test".$strQuestionNumber."' value   ='$slots[0]'>".$slots[0]."<br>"); //displaying 4 radio buttons with value of answer choice
        print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[1]'>".$slots[1]."<br>");
        print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[2]'>".$slots[2]."<br>");
        print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[3]'>".$slots[3]."<br>");
        print("<br>");

    }
}
//submit buton will go here
?>
<input type ="submit" value = "submit">
</form>

And also, here is the code for the "check answer" script which is called "mathcheck.php"

<?php
include('mathselect.php');
$answerChoice1 = $_POST('test1'); //pulls value of radio button
echo $answerchoice1;
$answerChoice2 = $_POST('test2');
$answerChoice3 = $_POST('test3');
$answerChoice4 = $_POST('test4');
$answerChoice5 = $_POST('test5');
$answerChoice6 = $_POST('test6');
$answerChoice7 = $_POST('test7');
$answerChoice8 = $_POST('test8');
$answerChoice9 = $_POST('test9');
$answerChoice10 = $_POST('test10');

$correctAnswer = $row['aanswer'];
$score = 0;

if ($answerchoice1 == $correctAnswer){
    $score = $score + 1;    
} else {
$score = $score;
}

if ($answerchoice2 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice3 == $correctAnswer){
    $score = $score + 1;
} else {
$score = $score;
}

if ($answerchoice4 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice5 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice6 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice7 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice8 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice9 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

if ($answerchoice10 == $correctAnswer){
    $score = $score + 1;
} else {
    $score = $score;
}

So, when I click on the submit button of the form, I get directed to the mathcheck script with an error. Here is the link to the quiz with the submit button for reference. http://socialsoftware.purchase.edu/nicholas.roberts/mathquiz/mathselect.php?category=Calculus

No data is being pulled at the moment. When I click on the submit button, nothing happens. If i type in the "mathcheck.php" link in my browser, I get an error saying "function get expects a string", meaning it wasnt pulling any data. — Nicholas Roberts
– Nicholas Roberts, Commented May 2, 2015 at 4:00
@NicholasRoberts Maybe try to put the radio buttons into the form ?! Also don't include your form into the validation: include('mathselect.php'); that makes also no sense — Rizier123
– Rizier123, Commented May 2, 2015 at 4:01

Jonathan · Accepted Answer · 2015-05-02 04:07:52Z

2

change all of your $_POST('x') to $_POST['x']

as it stands now you are trying to access it like a function not an array.

answered May 2, 2015 at 4:07

Jonathan

2,87515 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Jonathan Over a year ago

There may be other problems, but this is definitely one of the problems.

Rohit Gupta · Accepted Answer · 2015-07-20 20:55:31Z

1

You are loading $correctanswer once. It's not changed for every question ? SO, you need to load each answer before you do the check for that question.

edited Jul 20, 2015 at 20:55

answered May 2, 2015 at 4:02

Rohit Gupta

4,27723 gold badges36 silver badges47 bronze badges

Comments

Pedro Lobito · Accepted Answer · 2015-07-29 19:33:51Z

0

You may have more problems on your code, I couldn't check everything but you may start by putting the input fields inside the form tag, i.e.:

<form action="mathcheck.php" method="post">
<?php
print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[0]'>".$slots[0]."<br>"); //displaying 4 radio buttons with value of answer choice
        print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[1]'>".$slots[1]."<br>");
        print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[2]'>".$slots[2]."<br>");
        print ("<input type = 'radio' name='test".$strQuestionNumber."' value ='$slots[3]'>".$slots[3]."<br>");
        print("<br>");

    }
}
?>
<input type ="submit" value = "submit">
</form>

Also, the correct syntax of $_POST is:

$_POST['test2'];

NOT

$_POST('test2');

edited Jul 29, 2015 at 19:33

answered May 2, 2015 at 4:06

Pedro Lobito

99.8k36 gold badges274 silver badges278 bronze badges

5 Comments

Nicholas Roberts Over a year ago

Thanks for the response. Sadly I'm still getting the same error when I click on the submit button. Data still isnt being sent....

Pedro Lobito Over a year ago

Add error reporting to the top of your file(s) right after your opening PHP tag for example <?php error_reporting(E_ALL); ini_set('display_errors', 1); then the rest of your code, to see if it yields anything.

Jonathan Over a year ago

Fatal error: Function name must be a string in \\VSFILE07\STUDENTS-M-R\NICHOLAS.ROBERTS\SOCIAL_SOFTWARE\mathquiz\mathcheck.php on line 3

is caused by the $_POST syntax correction as noted by my answer and the one above.

Rizier123 Over a year ago

@PedroLobito Well that wasn't all long sleep was it?

Pedro Lobito Over a year ago

hahah, I was thinking that you would say that....SO is addictive, this answer is my last one!

Collectives™ on Stack Overflow

Using submit button to send data to PHP script

3 Answers 3

1 Comment

Comments

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related