function add_questions_by_category_to_quiz($quiz_id, $category_id) { // 1. Existing questions fetch karo $existing = get_post_meta($quiz_id, 'quiz-question', true); if (!is_array($existing)) { $existing = []; } // 2. Category ke questions lao $questions = get_posts([ 'post_type' => 'dtlms_questions', // apke plugin ka question post type 'posts_per_page' => -1, 'tax_query' => [ [ 'taxonomy' => 'question_category', // actual taxonomy slug daalo 'field' => 'term_id', 'terms' => $category_id, ] ], 'fields' => 'ids' ]); // 3. Merge karo bina duplicate ke $new_questions = array_unique(array_merge($existing, $questions)); // 4. Save karo update_post_meta($quiz_id, 'quiz-question', $new_questions); } Blog – Jee Prep Master

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