Include “required questions” in a random selection

Question

I\'m selecting a set of random questions without any duplicates using the following:

Answer 1

First you need to filter out the required questions like so:

$all_questions = get_field("step_by_step_test");
$required = $optional = array();
foreach($all_questions as $question) {
    if( $a['required_question']) $required[] = $question;
    else $optional[] = $question;
}
$amount = get_field("select_number_of_questions")-count($required);
shuffle($optional);
$final = array_merge($required,array_slice($optional,0,$amount));
foreach($final as $repeater_row) {
    ...
}

Hope I helped you again :p