Create a Quiz

[stephflix]

Does anyone know how to do this?

 

Use one multi- dimensional associative array to store the questions, choices and answers for this quiz. Use a nested foreach loop to display the questions and choices. Create and use a simple function to calculate the percentage based on the number correct out of the total number of questions.

[Jessica]

Yes, but we aren't here to do your homework for you. What's the point of taking a class you won't even try to learn from?

 

If you get stuck on a specific bug or concept we can help, but you should turn to your professor or TA first anyway.

[stephflix]

Hi Jessica,

That's completely understandable. You are correct, this is a homework assignment that I've been working on for some time. I just really don't understand it. Here's what I have so far:

 

 

<?php

$questions = array("Rebel Wilson's Character Name","What are Nodes?","What was Fat Amy's Secret Truth?", "What song did Beca audition with?", "What happened at last years finals?");

$answers = array(

array(0 =>'Fat Amy','Rebelicious','Fat Samy','Pitch Slapper'),

array(0 => 'Vocal cords rubbing together at an above average rate w/o proper lubrication','An STD','A high note','A point at which lines or pathways intersect'),

array(0 => 'My real name is Fat Patricia','I cheated on my boyfriends',"I'm kind of a stalker",'Back at my old school I was already a star'),

array(0 => 'Cup Song','Call me Maybe',"Titanium",'No Diggity'),

array(0 => 'Aubrey threw up on stage','They Won',"Chloe had surgery on her vocal chords",'Bumber sabotaged the Barden Belles')

);

 

 

function shuffle_assoc(&$array) {

$keys = array_rand($array, count($array));

foreach($keys as $key)

$new[$key] = $array[$key];

$array = $new;

return true;

}

 

 

I just really don't understand how to use a foreach loop to display the questions and choices.

Is there anything you can do to help me?

[Jessica]

Your function doesn't make any sense, why bother doing a foreach if you're just going to return the first value? Use array_shift() for that. 

 

Your assignment says to use ONE array. You're using several. Your answers aren't related to your questions in any way. Go look at Example #6 in the manual.

http://www.php.net/manual/en/language.types.array.php

 

Once you have your array structured correctly it would be elementary to foreach() through it and list the Q/A.

 

Edit: By the way, the song is called "Cups", and the character's name is Bumper with a p.

 

Edit 2: Arrays start at 0 by default, you don't need to start the first one with a 0 key.

Edited February 19, 2013 by Jessica

[stephflix]

Ok, here's what I have now:

 

 

 

$questionarray = array(

"What is Rebel Wilsons Character Name?" => array

(

20 => "Fat Amy",

0 => "Rebelicious",

0 => "Fat Samy",

0 => "Pitch Slapper",

 

),

"What are Nodes?" => array

(

0 => "An STD",

20 => "Vocal cords rubbing together at an above average rate w/o proper lubrication",

0 => "A point at which lines or pathways intersect",

0 => "A high note"

),

"What song did Beca audition with?" => array

(

20 => "Cups",

0 => "Call me Maybe",

0 => "Titanium",

0 => "No Diggity"

),

"What happened at last years finals?" => array

(

0 => "They Won",

0 => "Chloe had surgery on her vocal chords",

0 => "Bumper sabotaged the Barden Belles",

20 => "Aubrey threw up on stage"

)

);

 

 

 

// $questionarray is the key and $options is the value (an array)

foreach ($questionarray as $questions => $options) {

 

echo '<p>';

echo $questions;

echo '<br>';

 

// $options is the key and $points is the value

foreach ($options as $answer => $points) {

echo '<input type="radio" name="questions" value="20" id="questions" />';

echo $answer;

echo '<br>';

}

 

echo '</p>';

}

 

echo '<p align="center"><input type="submit" name="submit" value="Submit" /></p>';

 

 

 

It displays my quiz but it only allows me to answer one of the questions. When I click on the radio button for question 2 it erases question 1.

[Jessica]

So, that's a big improvement. Good job

 

(Please use the code tags so we can read your code easier).

 

I would not use the actual question as the key. You also cannot have multiple values at the 0 key, so you shouldn't be able to see all your answers...

 

Try something like this

<?php
$quiz = array(
   array(
       'question'=>'Question 1',
       'choices'=>array(
           'Choice 1-1', // Correct
           'Choice 1-2',
           'Choice 1-3',
           'Choice 1-4'
       ),
       'correct_answer'=>1 //Could do either the 0-based array key or the 1-based key, I chose 1 to be visually friendly
   ),
   array(
       'question'=>'Question 2',
       'choices'=>array(
           'Choice 2-1',
           'Choice 2-2',
           'Choice 2-3', // Correct
           'Choice 2-4'
       ),
       'correct_answer'=>3  
   ),
);

 

 

Then make sure each radio set has the name of "question[$id]" where $id is the array key of the current question and the values are the array keys of the answers. You'll have X distinct sets where X is your number of questions.

That will give you an array in $_POST that contains all the question IDs and the related answer ID.

Edited February 19, 2013 by Jessica