function hdq_before_mubasher99($quizID)
{
    ?>
    <script>
    function hdq_custom_submit(){
        let data = {};
        let no_answers = 0;

        // mark each question with string on whether answer was right, wrong, or unanswered
        jQuery("#hdq_<?php echo $quizID; ?> .hdq_question").each(function(){
            let data = "";
            if(!this.classList.contains("hdq_question_title") && !this.classList.contains("hdq_results_wrapper")){
                let sel = jQuery(this).find(".hdq_correct");
                if(sel.length > 0){
                    data = "Correct answer";
                } else {
                    sel = jQuery(this).find(".hdq_wrong");
                    if(sel.length > 0){
                        data = "Incorrect answer";
                    } else {
                        data = "No answer selected";
                        no_answers ++;
                    }
                }
            }

            jQuery("<h2>" + data +"</h2>").prependTo(this);
        });

        // hdq_score is array of score (score/total questions)
        let c = hdq_score[0];
        let t = hdq_score[1];
        let p = (parseFloat(c) / parseFloat(t)) * 100;
        p = p.toFixed(2);
        let d = `<p>Total correct answers: <strong>${c}</strong><br/>
                    Total Wrong Answers: <strong>${t}</strong><br/>
                    Total Skipped Questions: <strong>${no_answers}</strong><br/>
                    Total percentage: <strong>${p}%</strong>
                </p>`;
        let results_section = document.querySelectorAll(".hdq_share")[0];
        results_section.insertAdjacentHTML("beforebegin", d);
        return JSON.stringify(data); // expects a json string to be returned
    }
    </script>
<?php
}
add_action('hdq_before', 'hdq_before_mubasher99');

function hdq_submit_mubasher99($quizOptions)
{
    array_push($quizOptions->hdq_submit, "hdq_custom_submit");
    return $quizOptions;
}
add_action('hdq_submit', 'hdq_submit_mubasher99');