xavierlopez

$shortcode_course = '[course_content course_id="'.$course_id.'"]';

// echo LearnDash lessons from course_id
echo do_shortcode("$shortcode_course" );

xavierlopez

//Here we get an array of related LearnDash courses related to a WC_Product
$courses_id =  get_post_meta( $product->get_id(), '_related_course',true);