function learndash_get_course_quizzes( $course_id = 0 ) {
if ( !empty( $course_id ) ) {
$query_args = array(
'post_type' => 'sfwd-quiz',
'posts_per_page' => -1,
'orderby' => 'title',
'order' => 'ASC',
'meta_key' => 'course_id',
'meta_value' => $course_id,
'meta_compare' => '=',
// This tells WP_Query to return only the post IDs. Comment
// out if you want full Post object
'fields' => 'ids'
);
$query_results = new WP_Query( $query_args );
if ( !empty( $query_results->posts ) ) {
return $query_results->posts;
}
}
}
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