Score system php-undefined function - php

Question

I am working in a scoring system in php. When user chooses specific question, get extra points.
If anyone has a working PHP demo with code of a scoring system, he would be welcome. I mostly need a working "for" function:
"for question 1, if answer is abc, 5 points, else 0 points. for question 2, if aswer is bcd, 10 points, if answer is cft, 10 points, else 0 points", etc.
I would not want to have to fill my code with endless if statements.
For my current attempt, The error it displays:
Fatal error: Uncaught Error: Call to undefined function value() in C:\xampp\htdocs\score.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\score.php on line 18
Edit: I realized i might not have defined the "value" variable. It should give the value of "1 point" for now. How should i define it?
<?php
// Define questions and the correct answers
$questions = array(
'AB01' => 3, // correct answer to question AB01 is 3
'AB02' => 1, // correct answer to AB02 is code 1
'AB03' => 4, // correct answer to AB03 is hidden behind code 4
'AB04' => 2,
'AB05' => 1
// and so on
);
// Initialize counter variable
$points = 0;
// Check all questions in a loop
foreach ($questions as $variable=>$correct) {
// Call up participant's answer
$answer = value($variable);
// Check and count point if applicable
if ($answer == $correct) {
$points++; // synonymous with $points = $points + 1
}
}
// Show result ...
html('<p>You have scored'.$points.' points.</p>');
// ... or store in an internal variable
put('IV01_01', $points);
// ...
// Check all questions in a loop
foreach ($questions as $variable=>$correct) {
if (value($variable) == $correct) {
$points++;
}
}
// Show result or otherwise process
// ...
// Define questions and the values of possible answers
$questions = array(
'AB01' => array(1 => 2, 2 => 5, 3 => 3), // In question AB01, answer 1 has value 2, 2 has value 5, 3 has value 3
'AB02' => array(1 => 5, 2 => 4, 3 => 1), // In question AB02, values 5 (answer 1), 4 (2) und 1 (3) are assigned
'AB03' => array(1 => 0, 2 => 0, 3 => 5),
'AB04' => array(1 => 4, 2 => 0, 3 => 3),
'AB05' => array(1 => 2, 2 => 2, 3 => 5),
// u.s.w.
);
// Initialize counter variable
$points = 0;
// By using foreach you can just pass through the key-value pairs
foreach ($questions as $variable => $values) {
// Call up participant's answer
$answer = value($variable);
// Check if there is a value available for this answer (otherwise, do not award a point)
if (isset($values[$answer])) {
// Count the value
$points += $values[$answer];
}
}
// Show result or otherwise process
html('<p>You have scored'.$points.' points.</p>');
$points = valueSum('AB01');
// Show result or otherwise process
html('<p>You have scored '.$points.' points.</p>');
// Call up list of all items
$items = getItems('AB01');
// Initialize points variable
$points = 0;
// Pass through all items
foreach ($items as $item) {
// Question ID still has to be assembled
$id = 'AB01_'.sprintf('%02d', $item);
// Call up participant's answer
$answer = value($id);
// An error code may have been saved (e.g. -1 for "no response")
// Otherwise, count the answer
if ($answer > 0) {
$points += $answer;
}
}
// Show result or otherwise process
html('<p>You have scored '.$points.' points.</p>');
$points += $answer - 1;
// List of items - providing polarity in each case
$items = array(
'01' => +1,
'02' => -1,
'03' => +1,
'04' => +1,
'05' => -1
// and so on.
);
// Initialization of points variable
$points = 0;
// Pass through all items
foreach ($items as $item => $polarity) {
// Here the variable ID is built from the question and item IDs
$id = 'AB01_'.$item;
// Call up respondent's answer
$answer = value($id);
// Ignore if it is not a valid response
if ($answer < 1) {
// This means the rest are ignored in the FOR/FOREACH loop
continue;
}
// "Invert" answers
if ($polarity < 0) {
// In a 5-point scale, the inverted answer code has a value of 6
// the constant has to be adjusted for other differentations.
$answer = 6 - $answer;
}
// Add up
$points += $answer;
}
// Show result or otherwise process.
html('<p>You have scored'.$points.' points.</p>');
if (
(value('AB01_01') == 2) and
(value('AB01_02') == 2) and
(value('AB01_03') == 1) and
(value('AB01_04') == 1)
) {
// Count point, jump to a different part, or just display a message
html('<p>Correct</p>');
} else {
html('<p>Incorrect</p>');
}
// Define questions and their correct answers
// Only items are defined that will also be checked
$questions = array(
// In question AB01, 1 and 2 have to be checked, 3 and 4 must not be checked
'AB01' => array(1 => 2, 2 => 2, 3 => 1, 4 => 1),
// In question AB02, 2 and 3 have to be checked, 4 must not, and the value for 1 is irrelevant
'AB02' => array( 2 => 2, 3 => 2, 4 => 1),
// In AB03, all 4 have to be checked
'AB03' => array(1 => 2, 2 => 2, 3 => 2, 4 => 2),
// and so on.
'AB04' => array(1 => 1, 2 => 2, 3 => 1, 4 => 2),
'AB05' => array(1 => 2, 2 => 1, 3 => 2 )
);
// Initialize counter variable
$points = 0;
// Pass through all questions
foreach ($questions as $questionId => $answers) {
// Set the error counter for this question to 0
$error = 0;
foreach ($answers as $itemId => $default) {
// Assemble item ID
$id = $questionId.'_'.$itemId;
// Call up participant's answer
$answer = value($id);
// Verify answer is correct (actually: for falsehood)
if ($answer != $default) {
// In the event of any deviation, count as an error
$error++;
}
}
// Check if the question has been correctly answered
if ($error == 0) {
// Award a point
$points++;
}
}
// Show result or otherwise process
html('<p>You have scored '.$points.' points.</p>');
if ($points < 10) {
text('feedback1');
} elseif ($points < 20) {
text('feedback2');
} else {
text('feedback3');
}
$type = valueMean('AB01');
$use = valueMean('AB02');
if ($type < 1.5) {
text('typeA');
} elseif ($type <= 4.5) {
text('typeB');
} else {
text('typeC');
}
if ($use < 2.0) {
text('useA');
} elseif ($use < 4.0) {
text('useB');
} else {
text('useC');
}
?>

Answer 1

You will need to define a "value" function.
<?php
//Define it anywhere within the <?php tag
function value($arg){
// Your code logic here
}