| 1 |
<?php |
| 2 |
/** |
| 3 |
* Class LP_Course_Post_Type |
| 4 |
* |
| 5 |
* @author ThimPress |
| 6 |
* @package LearnPress/Classes |
| 7 |
* @version 3.0.2 |
| 8 |
*/ |
| 9 |
|
| 10 |
use LearnPress\Models\CourseModel; |
| 11 |
use LearnPress\Models\CoursePostModel; |
| 12 |
use LearnPress\Models\WPTables\CoursesTable; |
| 13 |
|
| 14 |
defined( 'ABSPATH' ) || exit(); |
| 15 |
|
| 16 |
if ( ! class_exists( 'LP_Course_Post_Type' ) ) { |
| 17 |
|
| 18 |
/** |
| 19 |
* Class LP_Course_Post_Type |
| 20 |
*/ |
| 21 |
final class LP_Course_Post_Type extends LP_Abstract_Post_Type { |
| 22 |
/** |
| 23 |
* @var null |
| 24 |
*/ |
| 25 |
protected static $_instance = null; |
| 26 |
protected $_post_type = LP_COURSE_CPT; |
| 27 |
protected $_screen_list = 'edit-' . LP_COURSE_CPT; |
| 28 |
|
| 29 |
/** |
| 30 |
* Constructor |
| 31 |
*/ |
| 32 |
public function __construct() { |
| 33 |
parent::__construct(); |
| 34 |
|
| 35 |
add_action( 'init', array( $this, 'register_taxonomy' ) ); |
| 36 |
add_filter( 'posts_where_paged', array( $this, '_posts_where_paged_course_items' ), 10 ); |
| 37 |
add_filter( 'posts_join_paged', array( $this, '_posts_join_paged_course_items' ), 10 ); |
| 38 |
} |
| 39 |
|
| 40 |
/** |
| 41 |
* Register course post type. |
| 42 |
*/ |
| 43 |
public function args_register_post_type(): array { |
| 44 |
// Support Quick Edit multiple courses change author |
| 45 |
add_post_type_support( LP_COURSE_CPT, 'author' ); |
| 46 |
|
| 47 |
$labels = array( |
| 48 |
'name' => _x( 'Courses', 'Post Type General Name', 'learnpress' ), |
| 49 |
'singular_name' => _x( 'Course', 'Post Type Singular Name', 'learnpress' ), |
| 50 |
'menu_name' => __( 'Courses', 'learnpress' ), |
| 51 |
'parent_item_colon' => __( 'Parent Item:', 'learnpress' ), |
| 52 |
'all_items' => __( 'Courses', 'learnpress' ), |
| 53 |
'view_item' => __( 'View Course', 'learnpress' ), |
| 54 |
'add_new_item' => __( 'Add a New Course', 'learnpress' ), |
| 55 |
'add_new' => __( 'Add New', 'learnpress' ), |
| 56 |
'edit_item' => __( 'Edit Course', 'learnpress' ), |
| 57 |
'update_item' => __( 'Update Course', 'learnpress' ), |
| 58 |
'search_items' => __( 'Search Courses', 'learnpress' ), |
| 59 |
'not_found' => sprintf( |
| 60 |
__( 'You have not had any courses yet. Click <a href="%s">Add new</a> to start', 'learnpress' ), |
| 61 |
admin_url( 'post-new.php?post_type=lp_course' ) |
| 62 |
), |
| 63 |
'not_found_in_trash' => __( 'There was no course found in the trash', 'learnpress' ), |
| 64 |
); |
| 65 |
$course_base = LP_Settings::get_option( 'course_base', 'courses' ); |
| 66 |
$course_permalink = empty( $course_base ) ? 'courses' : $course_base; |
| 67 |
|
| 68 |
// Set to $has_archive return link to courses page, is_archive will check is true |
| 69 |
$courses_page_id = learn_press_get_page_id( 'courses' ); |
| 70 |
$has_archive = $courses_page_id ? urldecode( get_page_uri( $courses_page_id ) ) : 'courses'; |
| 71 |
|
| 72 |
$args = array( |
| 73 |
'labels' => $labels, |
| 74 |
'public' => true, |
| 75 |
'query_var' => true, |
| 76 |
'publicly_queryable' => true, |
| 77 |
'show_ui' => true, |
| 78 |
'has_archive' => $has_archive, |
| 79 |
'capability_type' => $this->_post_type, |
| 80 |
'map_meta_cap' => true, |
| 81 |
'show_in_menu' => 'learn_press', |
| 82 |
'show_in_admin_bar' => true, |
| 83 |
'show_in_nav_menus' => true, |
| 84 |
'show_in_rest' => true, |
| 85 |
'taxonomies' => array( 'course_category', 'course_tag' ), |
| 86 |
'supports' => array( 'title', 'editor', 'thumbnail', 'revisions', 'comments', 'excerpt' ), |
| 87 |
'hierarchical' => false, |
| 88 |
'rewrite' => ! empty( $course_permalink ) ? array( |
| 89 |
'slug' => untrailingslashit( $course_permalink ), |
| 90 |
'with_front' => false, |
| 91 |
) : false, |
| 92 |
); |
| 93 |
|
| 94 |
return $args; |
| 95 |
} |
| 96 |
|
| 97 |
/** |
| 98 |
* Register course taxonomy. |
| 99 |
*/ |
| 100 |
public function register_taxonomy() { |
| 101 |
$category_base = LP_Settings::get_option( 'course_category_base' ); |
| 102 |
register_taxonomy( |
| 103 |
'course_category', |
| 104 |
array( LP_COURSE_CPT ), |
| 105 |
array( |
| 106 |
'label' => __( 'Course Categories', 'learnpress' ), |
| 107 |
'labels' => array( |
| 108 |
'name' => __( 'Course Categories', 'learnpress' ), |
| 109 |
'menu_name' => __( 'Course Category', 'learnpress' ), |
| 110 |
'singular_name' => __( 'Category', 'learnpress' ), |
| 111 |
'add_new_item' => __( 'Add A New Course Category', 'learnpress' ), |
| 112 |
'all_items' => __( 'All Categories', 'learnpress' ), |
| 113 |
), |
| 114 |
'query_var' => true, |
| 115 |
'public' => true, |
| 116 |
'hierarchical' => true, |
| 117 |
'show_ui' => true, |
| 118 |
'show_in_menu' => 'learn_press', |
| 119 |
'show_admin_column' => true, |
| 120 |
'show_in_admin_bar' => true, |
| 121 |
'show_in_nav_menus' => true, |
| 122 |
'show_in_rest' => true, |
| 123 |
'rewrite' => array( |
| 124 |
'slug' => empty( $category_base ) ? 'course-category' : $category_base, |
| 125 |
'hierarchical' => true, |
| 126 |
'with_front' => false, |
| 127 |
), |
| 128 |
) |
| 129 |
); |
| 130 |
|
| 131 |
$tag_base = LP_Settings::get_option( 'course_tag_base' ); |
| 132 |
register_taxonomy( |
| 133 |
'course_tag', |
| 134 |
array( LP_COURSE_CPT ), |
| 135 |
array( |
| 136 |
'labels' => array( |
| 137 |
'name' => __( 'Course Tags', 'learnpress' ), |
| 138 |
'singular_name' => __( 'Tag', 'learnpress' ), |
| 139 |
'search_items' => __( 'Search Course Tags', 'learnpress' ), |
| 140 |
'popular_items' => __( 'Popular Course Tags', 'learnpress' ), |
| 141 |
'all_items' => __( 'All Course Tags', 'learnpress' ), |
| 142 |
'parent_item' => null, |
| 143 |
'parent_item_colon' => null, |
| 144 |
'edit_item' => __( 'Edit Course Tag', 'learnpress' ), |
| 145 |
'update_item' => __( 'Update Course Tag', 'learnpress' ), |
| 146 |
'add_new_item' => __( 'Add A New Course Tag', 'learnpress' ), |
| 147 |
'new_item_name' => __( 'New Course Tag Name', 'learnpress' ), |
| 148 |
'separate_items_with_commas' => __( 'Separate tags with commas', 'learnpress' ), |
| 149 |
'add_or_remove_items' => __( 'Add or remove tags', 'learnpress' ), |
| 150 |
'choose_from_most_used' => __( 'Choose from the most used tags', 'learnpress' ), |
| 151 |
'menu_name' => __( 'Course Tags', 'learnpress' ), |
| 152 |
), |
| 153 |
'public' => true, |
| 154 |
'hierarchical' => false, |
| 155 |
'show_ui' => true, |
| 156 |
'show_in_menu' => 'learn_press', |
| 157 |
'update_count_callback' => '_update_post_term_count', |
| 158 |
'query_var' => true, |
| 159 |
'show_in_rest' => true, |
| 160 |
'rewrite' => array( |
| 161 |
'slug' => empty( $tag_base ) ? 'course-tag' : $tag_base, |
| 162 |
'with_front' => false, |
| 163 |
), |
| 164 |
) |
| 165 |
); |
| 166 |
} |
| 167 |
|
| 168 |
/** |
| 169 |
* Declare class name of table list courses. |
| 170 |
* |
| 171 |
* @param string $class_name |
| 172 |
* @param array $args |
| 173 |
* |
| 174 |
* @return string |
| 175 |
* @since 4.2.9.5 |
| 176 |
*/ |
| 177 |
public function wp_list_table_class_name( $class_name, $args ) { |
| 178 |
if ( $this->check_class_name_handle_table( $args['screen'] ) ) { |
| 179 |
$class_name = CoursesTable::class; |
| 180 |
} |
| 181 |
|
| 182 |
return $class_name; |
| 183 |
} |
| 184 |
|
| 185 |
/** |
| 186 |
* Delete course sections before delete course. |
| 187 |
* |
| 188 |
* @param int $post_id |
| 189 |
* |
| 190 |
* @throws Exception |
| 191 |
* @since modify 4.0.9 |
| 192 |
* @since 3.0.0 |
| 193 |
* @editor tungnx |
| 194 |
*/ |
| 195 |
public function before_delete( int $post_id ) { |
| 196 |
// Delete course from table learnpress_courses |
| 197 |
$courseModel = CourseModel::find( $post_id, true ); |
| 198 |
if ( $courseModel ) { |
| 199 |
$courseModel->delete(); |
| 200 |
} |
| 201 |
|
| 202 |
$course = learn_press_get_course( $post_id ); |
| 203 |
if ( ! $course ) { |
| 204 |
return; |
| 205 |
} |
| 206 |
$course->delete_relate_data_when_delete_course(); |
| 207 |
} |
| 208 |
|
| 209 |
/** |
| 210 |
* @param string $fields |
| 211 |
* |
| 212 |
* @return string |
| 213 |
*/ |
| 214 |
public function posts_fields( $fields ): string { |
| 215 |
if ( ! $this->is_page_list_posts_on_backend() ) { |
| 216 |
return $fields; |
| 217 |
} |
| 218 |
|
| 219 |
$fields = ' DISTINCT ' . $fields; |
| 220 |
if ( $this->get_order_by() == 'price' ) { |
| 221 |
$fields .= ', pm_price.meta_value as course_price'; |
| 222 |
} |
| 223 |
|
| 224 |
return $fields; |
| 225 |
} |
| 226 |
|
| 227 |
public function _posts_join_paged_course_items( $join ) { |
| 228 |
global $wpdb; |
| 229 |
|
| 230 |
$course_id = $this->_filter_items_by_course(); |
| 231 |
if ( $course_id || LP_Request::get_param( 'orderby' ) === 'course-name' ) { |
| 232 |
$join .= " LEFT JOIN {$wpdb->prefix}learnpress_section_items si ON {$wpdb->posts}.ID = si.item_id"; |
| 233 |
$join .= " LEFT JOIN {$wpdb->prefix}learnpress_sections s ON s.section_id = si.section_id"; |
| 234 |
$join .= " LEFT JOIN {$wpdb->posts} c ON c.ID = s.section_course_id"; |
| 235 |
} |
| 236 |
|
| 237 |
return $join; |
| 238 |
} |
| 239 |
|
| 240 |
public function _posts_where_paged_course_items( $where ) { |
| 241 |
global $wpdb; |
| 242 |
|
| 243 |
$course_id = $this->_filter_items_by_course(); |
| 244 |
if ( $course_id ) { |
| 245 |
$where .= $wpdb->prepare( ' AND (c.ID = %d)', $course_id ); |
| 246 |
$where .= $wpdb->prepare( " AND {$wpdb->posts}.post_status = %s", 'publish' ); |
| 247 |
} |
| 248 |
|
| 249 |
return $where; |
| 250 |
} |
| 251 |
|
| 252 |
/** |
| 253 |
* @param $join |
| 254 |
* |
| 255 |
* @return string |
| 256 |
*/ |
| 257 |
public function posts_join_paged( $join ) { |
| 258 |
global $wpdb; |
| 259 |
|
| 260 |
if ( ! $this->is_page_list_posts_on_backend() ) { |
| 261 |
return $join; |
| 262 |
} |
| 263 |
|
| 264 |
if ( ! isset( $_GET['orderby'] ) || $_GET['orderby'] !== 'price' ) { |
| 265 |
return $join; |
| 266 |
} |
| 267 |
|
| 268 |
$join .= " LEFT JOIN {$wpdb->postmeta} pm_price ON pm_price.post_id = {$wpdb->posts}.ID AND pm_price.meta_key = '_lp_price'"; |
| 269 |
|
| 270 |
return $join; |
| 271 |
} |
| 272 |
|
| 273 |
/** |
| 274 |
* @param $where |
| 275 |
* |
| 276 |
* @return mixed|string |
| 277 |
*/ |
| 278 |
public function posts_where_paged( $where ) { |
| 279 |
global $wpdb; |
| 280 |
|
| 281 |
if ( ! $this->is_page_list_posts_on_backend() ) { |
| 282 |
return $where; |
| 283 |
} |
| 284 |
|
| 285 |
$filter_price = LP_Helper::sanitize_params_submitted( $_REQUEST['filter_price'] ?? 0 ); |
| 286 |
|
| 287 |
if ( array_key_exists( 'filter_price', $_REQUEST ) ) { |
| 288 |
if ( $filter_price == 0 ) { |
| 289 |
$where .= ' AND ( pm_price.meta_value IS NULL || pm_price.meta_value = 0 )'; |
| 290 |
} else { |
| 291 |
$where .= $wpdb->prepare( ' AND ( pm_price.meta_value = %s )', $filter_price ); |
| 292 |
} |
| 293 |
} |
| 294 |
|
| 295 |
/*$not_in = $wpdb->prepare( |
| 296 |
" |
| 297 |
SELECT ID |
| 298 |
FROM {$wpdb->posts} p |
| 299 |
INNER JOIN {$wpdb->postmeta} pm ON pm.post_id = p.ID AND pm.meta_key = %s |
| 300 |
WHERE pm.meta_value = %s |
| 301 |
", |
| 302 |
'_lp_preview_course', |
| 303 |
'yes' |
| 304 |
); |
| 305 |
|
| 306 |
$where .= " AND {$wpdb->posts}.ID NOT IN( {$not_in} )";*/ |
| 307 |
|
| 308 |
return $where; |
| 309 |
} |
| 310 |
|
| 311 |
/** |
| 312 |
* @param $orderby |
| 313 |
* |
| 314 |
* @return string |
| 315 |
*/ |
| 316 |
public function posts_orderby( $orderby ) { |
| 317 |
if ( ! $this->is_page_list_posts_on_backend() ) { |
| 318 |
return $orderby; |
| 319 |
} |
| 320 |
|
| 321 |
$order = $this->get_order_sort(); |
| 322 |
switch ( $this->get_order_by() ) { |
| 323 |
case 'price': |
| 324 |
$orderby = "CAST(pm_price.meta_value AS UNSIGNED) {$order}"; |
| 325 |
} |
| 326 |
|
| 327 |
return $orderby; |
| 328 |
} |
| 329 |
|
| 330 |
/** |
| 331 |
* Save course post |
| 332 |
* |
| 333 |
* @param int $post_id |
| 334 |
* @param WP_Post|null $post |
| 335 |
* @param bool $is_update |
| 336 |
* |
| 337 |
* @since 4.2.6.9 |
| 338 |
* @version 1.0.2 |
| 339 |
*/ |
| 340 |
public function save_post( int $post_id, ?WP_Post $post = null, bool $is_update = false ) { |
| 341 |
try { |
| 342 |
$wp_screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null; |
| 343 |
// Save to table learnpress_courses |
| 344 |
LP_Install::instance()->create_table_courses(); |
| 345 |
if ( empty( $post ) ) { |
| 346 |
$post = get_post( $post_id ); |
| 347 |
} |
| 348 |
|
| 349 |
/*if ( $post->post_status === 'auto-draft' ) { |
| 350 |
return; |
| 351 |
}*/ |
| 352 |
|
| 353 |
$courseModel = CourseModel::find( $post_id, true ); |
| 354 |
if ( ! $courseModel ) { |
| 355 |
$courseModel = new CourseModel( $post ); |
| 356 |
} |
| 357 |
|
| 358 |
// Merge object post and courseModel |
| 359 |
$new_obj = (array) $post; |
| 360 |
$old_obj = (array) $courseModel; |
| 361 |
$old_now = array_merge( $old_obj, $new_obj ); |
| 362 |
$courseModel = new CourseModel( $old_now ); |
| 363 |
|
| 364 |
// Get all metadata of course |
| 365 |
if ( $is_update && empty( $wp_screen ) ) { |
| 366 |
$coursePost = new CoursePostModel( $courseModel ); |
| 367 |
$coursePost->get_all_metadata(); |
| 368 |
// Temporary unset _elementor_page_assets of El, reason by method get_all_metadata get not use maybe_unserialize, make save invalid serialize |
| 369 |
$coursePost->meta_data->_elementor_page_assets = []; |
| 370 |
|
| 371 |
$courseModel->meta_data = $coursePost->meta_data; |
| 372 |
} |
| 373 |
|
| 374 |
// Save option single course |
| 375 |
include_once LP_PLUGIN_PATH . 'inc/admin/class-lp-admin.php'; |
| 376 |
$lp_meta_box_course = new LP_Meta_Box_Course(); |
| 377 |
$ground_fields = $lp_meta_box_course->metabox( $courseModel->ID ); |
| 378 |
// Save meta fields |
| 379 |
foreach ( $ground_fields as $fields ) { |
| 380 |
if ( ! isset( $fields['content'] ) ) { |
| 381 |
continue; |
| 382 |
} |
| 383 |
foreach ( $fields['content'] as $meta_key => $option ) { |
| 384 |
$option->id = $meta_key; |
| 385 |
if ( ! $option instanceof LP_Meta_Box_Field ) { |
| 386 |
continue; |
| 387 |
} |
| 388 |
|
| 389 |
if ( isset( $_POST[ $meta_key ] ) && ! empty( $wp_screen ) && LP_COURSE_CPT === $wp_screen->id ) { |
| 390 |
$value_saved = $option->save( $courseModel->ID ); |
| 391 |
if ( ! empty( $value_saved ) ) { |
| 392 |
$courseModel->meta_data->{$meta_key} = $value_saved; |
| 393 |
} else { |
| 394 |
$courseModel->meta_data->{$meta_key} = maybe_unserialize( |
| 395 |
get_post_meta( $courseModel->ID, $meta_key, true ) |
| 396 |
); |
| 397 |
} |
| 398 |
} elseif ( ! $is_update ) { |
| 399 |
$courseModel->meta_data->{$meta_key} = $option->default ?? ''; |
| 400 |
} elseif ( ! empty( $wp_screen ) && LP_COURSE_CPT === $wp_screen->id ) { |
| 401 |
$value_saved = $option->save( $courseModel->ID ); |
| 402 |
$courseModel->meta_data->{$meta_key} = $value_saved; |
| 403 |
} |
| 404 |
} |
| 405 |
} |
| 406 |
|
| 407 |
// For case bulk edit multiple courses change author |
| 408 |
$bulk_edit = LP_Request::get_param( 'bulk_edit', false ); |
| 409 |
if ( ! empty( $bulk_edit ) ) { |
| 410 |
$post_author = LP_Request::get_param( 'post_author', 0, 'int' ); |
| 411 |
if ( $post_author != -1 ) { // -1 is for no change author |
| 412 |
$courseModel->post_author = $post_author; |
| 413 |
} |
| 414 |
} elseif ( ! empty( $_REQUEST['_post_author'] ) ) { |
| 415 |
// Not use key 'post_author' on single edit course, it special key of WP, Gutenberg save will not submit this key. |
| 416 |
$courseModel->post_author = LP_Request::get_param( '_post_author', 0, 'int' ); |
| 417 |
/** |
| 418 |
* Save author to post table |
| 419 |
* Not use PostModel::save() or CoursePostModel::save() here |
| 420 |
* because it calls wp_update_post(), has hook 'save_post', it will cause infinite loop |
| 421 |
*/ |
| 422 |
$lp_db = LP_Database::getInstance(); |
| 423 |
$filter_update = new LP_Post_Type_Filter(); |
| 424 |
$filter_update->collection = $lp_db->tb_posts; |
| 425 |
$filter_update->set[] = "post_author = {$courseModel->post_author}"; |
| 426 |
$filter_update->where[] = $lp_db->wpdb->prepare( 'AND ID = %d', $courseModel->ID ); |
| 427 |
$lp_db->update_execute( $filter_update ); |
| 428 |
clean_post_cache( $post->ID ); |
| 429 |
} elseif ( isset( $_POST['post_author'] ) && isset( $_POST['screen'] ) && $_POST['screen'] === 'edit-' . LP_COURSE_CPT ) { |
| 430 |
// For case quick edit change author. |
| 431 |
$courseModel->post_author = LP_Request::get_param( 'post_author', 0, 'int' ); |
| 432 |
} |
| 433 |
|
| 434 |
$this->save_price( $courseModel ); |
| 435 |
$courseModel->save(); |
| 436 |
// End save to table learnpress_courses |
| 437 |
|
| 438 |
// Save extra info course |
| 439 |
// Save in background. |
| 440 |
$bg = LP_Background_Single_Course::instance(); |
| 441 |
$bg->data( |
| 442 |
array( |
| 443 |
'handle_name' => 'save_post', |
| 444 |
'course_id' => $post_id, |
| 445 |
'data' => $_POST ?? [], |
| 446 |
) |
| 447 |
)->dispatch(); |
| 448 |
} catch ( Throwable $e ) { |
| 449 |
LP_Debug::error_log( $e ); |
| 450 |
} |
| 451 |
} |
| 452 |
|
| 453 |
/** |
| 454 |
* Save price course |
| 455 |
* |
| 456 |
* @return void |
| 457 |
* @throws Exception |
| 458 |
*/ |
| 459 |
protected function save_price( CourseModel &$courseObj ) { |
| 460 |
$coursePost = new CoursePostModel( $courseObj ); |
| 461 |
|
| 462 |
$regular_price = $courseObj->get_regular_price(); |
| 463 |
$sale_price = $courseObj->get_sale_price(); |
| 464 |
if ( (float) $regular_price < 0 ) { |
| 465 |
$courseObj->meta_data->{CoursePostModel::META_KEY_REGULAR_PRICE} = ''; |
| 466 |
$regular_price = $courseObj->get_regular_price(); |
| 467 |
} |
| 468 |
|
| 469 |
if ( $sale_price !== '' && (float) $sale_price > (float) $regular_price ) { |
| 470 |
$courseObj->meta_data->{CoursePostModel::META_KEY_SALE_PRICE} = ''; |
| 471 |
$sale_price = $courseObj->get_sale_price(); |
| 472 |
} |
| 473 |
|
| 474 |
// Save sale regular price and sale price to table postmeta |
| 475 |
$coursePost->save_meta_value_by_key( CoursePostModel::META_KEY_REGULAR_PRICE, $regular_price ); |
| 476 |
$coursePost->save_meta_value_by_key( CoursePostModel::META_KEY_SALE_PRICE, $sale_price ); |
| 477 |
|
| 478 |
$has_sale = $courseObj->has_sale_price(); |
| 479 |
if ( $has_sale ) { |
| 480 |
$courseObj->is_sale = 1; |
| 481 |
$coursePost->save_meta_value_by_key( CoursePostModel::META_KEY_IS_SALE, 1 ); |
| 482 |
} else { |
| 483 |
$courseObj->is_sale = 0; |
| 484 |
delete_post_meta( $courseObj->get_id(), CoursePostModel::META_KEY_IS_SALE ); |
| 485 |
} |
| 486 |
|
| 487 |
// Set price to sort on lists. |
| 488 |
$courseObj->price_to_sort = $courseObj->get_price(); |
| 489 |
$coursePost->save_meta_value_by_key( CoursePostModel::META_KEY_PRICE, $courseObj->price_to_sort ); |
| 490 |
} |
| 491 |
|
| 492 |
/** |
| 493 |
* Instance LP_Course_Post_Type. |
| 494 |
* |
| 495 |
* @return LP_Course_Post_Type|null |
| 496 |
*/ |
| 497 |
public static function instance() { |
| 498 |
if ( ! self::$_instance ) { |
| 499 |
self::$_instance = new self(); |
| 500 |
} |
| 501 |
|
| 502 |
return self::$_instance; |
| 503 |
} |
| 504 |
} |
| 505 |
|
| 506 |
$course_post_type = LP_Course_Post_Type::instance(); |
| 507 |
} |
| 508 |
|
