Getting a list of lessons from a function in backend

Hey @liqipotato

Give this a shot:

https://developer.lifterlms.com/reference/classes/llms_course/get_lessons/

Any questions let us know!

Hey Thomas,

I’ve also tried that function but it doesn’t seem to work. I’m not sure if I’m using it correctly but here’s my code. My objective here is to append the lesson titles into a list.

$courselist = [];
if ($student && $student->is_enrolled(6895)){
    $courseid = 6895;
    $lessonlist = $courseid->get_lessons( $return = 'lessons' );
	foreach ($lessonlist as $lesson){
	    array_push($courselist, $lesson);
	}
}

Correct me if I’m wrong but get_lessons is a public function so a course object is needed for get_lessons() to work. So because of that, I got an error saying “Fatal error: Uncaught Error: Call to a member function get_lessons() on int in /home/customer/www….” Let me know how I can solve this, thank you!

• This reply was modified 3 years, 4 months ago by liqipotato.

@liqipotato,

Try this:

$course_id = 123;
$course = llms_get_post( $course_id ); // Returns an LLMS_Course object.
if ( ! $course ) {
  // Course ID is not a valid course id.
} else {
  // Use the course object to do stuff.
}

• This reply was modified 3 years, 4 months ago by Thomas Patrick Levy.

Thank you for assisting, but it still doesn’t work. Here’s my code.

if ($student && $student->is_enrolled(5580)){  
	$course = llms_get_post(5580); //returns an LLMS_Course object
	$lessonlist = $course->get_lessons( $return = 'lessons' ); 
	foreach ($lessonlist as $lesson){
		array_push($courselist, $lesson);
	}
}

I’m assuming that $course->get_lessons() returns a list of lesson objects? Because the new error I’m seeing is “Fatal error: Uncaught Error: Object of class LLMS_Lesson could not be converted to string in /home/customer/www/……” Any idea how to get lesson titles from the lesson object?

@liqipotato

$lesson->get( 'title' )

You can access any lesson properties (as defined on the object, see the docs linked below) using the generic get() method.

Other (mostly computed) information (such as relationships) are accessible via the class methods.

LLMS_Lesson docs: https://developer.lifterlms.com/reference/classes/llms_lesson/

Best!

Also this is (technically) wrong:

$lessonlist = $course->get_lessons( $return = 'lessons' );

Should be:

$lessonlist = $course->get_lessons( 'lessons' );

• This reply was modified 3 years, 4 months ago by Thomas Patrick Levy. Reason: added "technically"

I see, I was trying to find something like a get_title method in the lesson class file but couldn’t find it. It works now so thank you for your assistance! Wishing you a great weekend ahead ??