URL redirect after correct answers

Here you go 🙂

// Tell HD Quiz to run a function once the quiz has been completed
function hdq_faradaydeman_submit($quizOptions)
{
    array_push($quizOptions->hdq_submit, "hdq_faradaydeman_submit");
    return $quizOptions;
}
add_action('hdq_submit', 'hdq_faradaydeman_submit');

// Add new custom "redirect" field to quiz settings results tab
function hdq_faradaydeman_add_custom_fields_to_quizzes($fields)
{
    $field = array(
        "id" => "hdq_redirect",
        "type" => "text",
        "label" => "Redirect on success",
        "placeholder" => "https://",
        "description" => "This is a custom field to only redirect on a passed quiz"
    );
    array_push($fields["Results"]["children"], $field);
    return $fields;
}
add_action('hdq_add_quiz_field', 'hdq_faradaydeman_add_custom_fields_to_quizzes');

// add custom function that will run once the quiz has been completed
function hdq_faradaydeman_redirect($quiz_id)
{
    $quiz_settings = hdq_get_quiz($quiz_id);
    if (isset($quiz_settings["hdq_redirect"]) && $quiz_settings["hdq_redirect"] != null) {
        $redirect = $quiz_settings["hdq_redirect"];
        hdq_faradaydeman_print_redirect($redirect);
    }

?>
    <script>
        function hdq_faradaydeman_submit() {
            if (typeof hdq_redirect_url != "undefined") {
                // figure out if the user passed;
                let pass_percent = HDQ.VARS.quiz.quiz_pass_percentage;
                let score = HDQ.VARS.hdq_score[0] / HDQ.VARS.hdq_score[1] * 100;
                if (score >= pass_percent) {
                    setTimeout(function() {
                        window.location.replace(hdq_redirect_url);
                    }, 1500); // 1500 = 1.5seconds. 
                }
            }
        }
    </script>
<?php
}
add_action('hdq_after', 'hdq_faradaydeman_redirect');

function hdq_faradaydeman_print_redirect($redirect)
{
?>
    <script>
        let hdq_redirect_url = "<?php echo $redirect; ?>";
    </script>
<?php
}

The code I provided was tested and works.

• 1. Make sure you have the redirect URL in the new field quiz settings
• 2. Clear your site caches and browser cache since replacing code won’t clear caches

Your version has several issues with it and I cannot recommend that you use it on your website.

If it works for you and you are happy, it’s your site! But I feel that I need to warn you about the following:

• It is running a function every 400ms – that’s more than twice a second. This is very inefficient.
• The function is loading the entirety of your page content and storing it as a string. It is then checking this massive string for the substring “Success!”. This is a very bad idea! Not only is is extremely slow, but it can be broken easily. If anywhere else on your page you ever put the word Success!, this function will instantly close. What’s worse is that it is doing this all of this every 400ms!
• Your function auto stops after 20 seconds from when the page loads. If for whatever reason a user visits the page and takes more than 20 seconds to do whatever they need to do, this function will fail.

My solution will work 100% of the time, every time, allows you to enable and disable it per quiz, only runs once when it is needed, and actually checks the quiz score instead of parsing your entire page looking for a string.

My assumption is that you are using the default redirect field that is built into HD Quiz instead of the new custom field we added with this code. Make sure that original field is empty now as we don’t want the full redirection to happen, just our new one.

The default field will always redirect, the custom field will only redirect if the quiz passed.

The correct field is called “Redirect on success” on the Results tab of the quiz edit page.

If for whatever reason it still doesn’t work, you can post a link to a quiz and I’ll take a look and verify that the everything is added correctly or not. If you want to keep the URL private you can send it to me using the contact form at the bottom of harmonicdesign.ca