LearnPress Developer Documentation

Using Hooks and Filters


Understanding Hooks and Filters

WordPress and LearnPress use a system of hooks and filters to allow developers to modify functionality and appearance:

  • Action Hooks – Allow you to add custom content or functionality at specific points in the code
  • Filter Hooks – Allow you to modify data or content before it’s displayed or processed

Action Hooks

Common Action Hooks

Hook Name Description Location
learn-press/before-main-content Executes before the main content area templates/single-course.php, templates/archive-course.php
learn-press/after-main-content Executes after the main content area templates/single-course.php, templates/archive-course.php
learn-press/course-content-summary Executes within the course content summary templates/single-course/content.php
learn-press/before-checkout-form Executes before the checkout form templates/checkout/form.php
learn-press/after-checkout-form Executes after the checkout form templates/checkout/form.php
learn-press/before-course-item-content Executes before course item content templates/single-course/content-item.php
learn-press/after-course-item-content Executes after course item content templates/single-course/content-item.php
learn-press/before-profile-content Executes before profile content templates/profile/content.php
learn-press/after-profile-content Executes after profile content templates/profile/content.php

Filter Hooks

Hook Name Description Parameters
learn-press/course-content-summary Modifies the course content summary $content, $course
learn_press_get_template Modifies the template file path $template_name, $args, $template_path, $default_path
learn-press/course-tabs Modifies the course tabs $tabs, $course
learn-press/profile-tabs Modifies the profile tabs $tabs, $user
learn-press/course-item-class Modifies the CSS classes for course items $classes, $item_id, $course_id
learn-press/filter-courses/type/fields Modifies the course type filter options $filter_types
learn-press/course-object-query-args Modifies the course query arguments $args

Examples

Example 1: Modifying Course Query

// Add to functions.php
function modify_course_query_args($args) {
    // Only show courses from a specific category
    $args['tax_query'] = array(
        array(
            'taxonomy' => 'course_category',
            'field'    => 'term_id',
            'terms'    => array(123),
            'operator' => 'IN',
            'include_children' => false
        )
    );
    
    // Change the number of courses per page
    $args['posts_per_page'] = 12;
    
    return $args;
}
add_filter('learn-press/course-object-query-args', 'modify_course_query_args');

Example 2: Adding Custom Course Tabs

// Add to functions.php
function add_custom_course_tab($tabs, $course) {
    // Add a new "Resources" tab
    $tabs['resources'] = array(
        'title'    => __('Resources', 'your-text-domain'),
        'priority' => 40,
        'callback' => 'display_course_resources_tab'
    );
    return $tabs;
}
add_filter('learn-press/course-tabs', 'add_custom_course_tab', 10, 2);

// Callback function to display tab content
function display_course_resources_tab() {
    $course = LP_Global::course();
    echo '
Course Resources
';
    echo '';
}

Example 3: Customizing Course Type Labels

// Add to functions.php
function modify_course_type_labels($filter_types) {
    if (isset($filter_types['online'])) {
        $filter_types['online'] = __('Virtual Learning', 'your-text-domain');
    }
    
    if (isset($filter_types['offline'])) {
        $filter_types['offline'] = __('In-Person Classes', 'your-text-domain');
    }
    
    return $filter_types;
}
add_filter('learn-press/filter-courses/type/fields', 'modify_course_type_labels');

Best Practices

  1. Use a child theme for your customizations
  2. Prefix your function names to avoid conflicts
  3. Check hook parameters carefully
  4. Test thoroughly after updates
  5. Use conditional logic when needed
Warning: Always use hooks and filters instead of modifying plugin files directly.