Moodle course customfields

moodle_course_customfields.php

<?php

// Get customfields on course context.
// Can be used for the plugin settings page (dropdown). 
$handler = \core_course\customfield\course_handler::create();
$fields = $handler->get_fields();


// Get customfields with data for a course.
$courseid = 16;
$fields = \core_course\customfield\course_handler::create()->get_instance_data($courseid);
foreach($fields as $field){
    /** @var \customfield_text\data_controller $field */
   echo $field->get_field()->get_formatted_name() . '<br>';
   echo $field->get_value(). '<br>';
}