Converts the questions from the "OCA Java SE 7 Programmer 1 Study Guide (Exam 1Z0-803)" book CD into a readable JSON format. The dBASE files from the book disc have to be exported to a csv file first.

convert.php

<?php
/**
* Converts the questions from the "OCA Java SE 7 Programmer 1 Study Guide (Exam 1Z0-803)" book CD into a readable JSON format.
* The dBASE files from the book disc have to be exported to a csv file first.
* 
* @autor Guido Krömer <[email protected]>
*/

$fileQuestions = 'Questions.csv';
$fileAnswers = 'Answers.csv';

function getAnswers ($fileAnswers, $delimiter = ',') {
    $handle = fopen($fileAnswers, 'r');
    $numToAlpha = range('A', 'Z');
    $answers = [];

    while ($data = fgetcsv($handle, 0, $delimiter)) {
        $numAnswer = $data[1] - 1;
        $answers[$data[0]][$numAnswer] = utf8_encode($numToAlpha[$numAnswer] . ': ' . $data[2]);
    }

    fclose($handle);

    return $answers;
}

function getRightAnswers($data, $answers) {
    $id = $data[1];
    $answerNumber = intval($data[6]);
    $countPossibleAnswers = count($answers[$id]);

    $returnVal = [];
    $returnVal = array_fill(0, $countPossibleAnswers, false);

    if ($answerNumber < $countPossibleAnswers) {
        $returnVal[$answerNumber -1] = true;
        return $returnVal;
    }

    $bit = 1;
    for ($i = 0; $i < $countPossibleAnswers; ++$i) {
        $returnVal[$i] = ($answerNumber & $bit) > 0;
        $bit *= 2;
    }
    return $returnVal;

}

function getQuestions ($fileQuestions, array $answers, $delimiter = ',') {
    $handle = fopen($fileQuestions, 'r');
    $questions = [];

    while ($data = fgetcsv($handle, 0, $delimiter)) {
        $questions[] = [
            'title' => utf8_encode($data[3]),
            'text' => utf8_encode($data[4]),
            'options' => $answers[$data[1]],
            'rightAnswers' => getRightAnswers($data, $answers),
            'hint' => utf8_encode($data[7]),
            'answerDescription' => utf8_encode($data[8]),
        ];
    }
    
    fclose($handle);

    return $questions;
}

echo json_encode([
    'title'         => 'OCJA 7',
    'description'   => '',
    'questions'     => getQuestions($fileQuestions, getAnswers($fileAnswers)),
], JSON_PRETTY_PRINT);