Gecko [ hardcoreshoppe.luxetravelplans.com ]

Name	Size	Permission	Date
ID3	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
IXR	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
PHPMailer	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
Requests	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
SimplePie	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
Text	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
assets	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
block-bindings	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
block-patterns	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
block-supports	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
blocks	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
certificates	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
css	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
customize	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
fonts	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
html-api	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
images	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
interactivity-api	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
js	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
l10n	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
php-compat	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
pomo	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
rest-api	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
sitemaps	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
sodium_compat	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
style-engine	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
theme-compat	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
widgets	[ DIR ]	drwxr-xr-x	2024-06-14 01:17
.htaccess	197 B	-r--r--r--	2025-05-03 06:31
admin-bar.php	36.03 KB	-rw-r--r--	2024-03-05 08:20
atomlib.php	11.67 KB	-rw-r--r--	2022-04-21 20:54
author-template.php	18.51 KB	-rw-r--r--	2023-05-15 03:28
block-bindings.php	5.51 KB	-rw-r--r--	2024-02-16 23:25
block-editor.php	27.27 KB	-rw-r--r--	2023-09-28 03:10
block-i18n.json	316 B	-rw-r--r--	2021-08-11 18:38
block-patterns.php	12.85 KB	-rw-r--r--	2024-02-28 07:35
block-template-utils.php	52.6 KB	-rw-r--r--	2024-04-24 21:50
block-template.php	12 KB	-rw-r--r--	2023-10-28 03:48
blocks.php	81.39 KB	-rw-r--r--	2024-06-25 00:34
bookmark-template.php	12.61 KB	-rw-r--r--	2023-06-23 00:27
bookmark.php	15.06 KB	-rw-r--r--	2023-12-16 01:03
cache-compat.php	5.83 KB	-rw-r--r--	2022-10-11 03:52
cache.php	13.16 KB	-rw-r--r--	2022-10-11 03:52
canonical.php	33.7 KB	-rw-r--r--	2024-02-17 10:04
capabilities.php	39.09 KB	-rw-r--r--	2023-07-10 05:47
category-template.php	55.67 KB	-rw-r--r--	2023-09-26 09:57
category.php	12.41 KB	-rw-r--r--	2023-08-24 18:31
class-IXR.php	2.48 KB	-rw-r--r--	2020-02-06 17:03
class-avif-info.php	28.92 KB	-rw-r--r--	2024-04-27 00:57
class-feed.php	529 B	-rw-r--r--	2020-02-06 17:03
class-http.php	367 B	-rw-r--r--	2022-06-17 20:50
class-json.php	42.66 KB	-rw-r--r--	2023-02-04 00:05
class-oembed.php	401 B	-rw-r--r--	2022-06-17 20:50
class-phpass.php	6.55 KB	-rw-r--r--	2023-02-13 19:38
class-phpmailer.php	664 B	-rw-r--r--	2020-07-21 22:28
class-pop3.php	20.48 KB	-rw-r--r--	2023-02-11 23:13
class-requests.php	2.18 KB	-rw-r--r--	2023-04-05 22:42
class-simplepie.php	95.76 KB	-rw-r--r--	2024-02-17 23:55
class-smtp.php	457 B	-rw-r--r--	2021-01-27 00:15
class-snoopy.php	36.83 KB	-rw-r--r--	2023-02-04 00:05
class-walker-category-dropdown.php	2.41 KB	-rw-r--r--	2023-09-14 22:16
class-walker-category.php	8.28 KB	-rw-r--r--	2023-09-08 19:02
class-walker-comment.php	13.88 KB	-rw-r--r--	2023-09-09 18:58
class-walker-nav-menu.php	11.05 KB	-rw-r--r--	2023-06-28 00:56
class-walker-page-dropdown.php	2.65 KB	-rw-r--r--	2023-09-14 22:16
class-walker-page.php	7.43 KB	-rw-r--r--	2023-09-14 22:16
class-wp-admin-bar.php	17.43 KB	-rw-r--r--	2024-03-05 08:20
class-wp-ajax-response.php	5.14 KB	-rw-r--r--	2022-09-13 01:17
class-wp-application-passwords.php	12.55 KB	-rw-r--r--	2023-05-09 08:07
class-wp-block-bindings-registry.php	8.78 KB	-rw-r--r--	2024-02-16 23:25
class-wp-block-bindings-source.php	2.13 KB	-rw-r--r--	2024-02-16 23:25
class-wp-block-editor-context.php	1.32 KB	-rw-r--r--	2022-09-13 01:17
class-wp-block-list.php	4.65 KB	-rw-r--r--	2023-11-02 09:34
class-wp-block-parser-block.php	2.5 KB	-rw-r--r--	2023-06-27 10:15
class-wp-block-parser-frame.php	1.87 KB	-rw-r--r--	2023-06-27 10:15
class-wp-block-parser.php	11.26 KB	-rw-r--r--	2023-10-17 04:47
class-wp-block-pattern-categories-registry.php	5.25 KB	-rw-r--r--	2022-09-13 01:17
class-wp-block-patterns-registry.php	11.34 KB	-rw-r--r--	2024-02-28 07:35
class-wp-block-styles-registry.php	5.75 KB	-rw-r--r--	2022-09-13 01:17
class-wp-block-supports.php	5.39 KB	-rw-r--r--	2023-09-29 19:50
class-wp-block-template.php	1.91 KB	-rw-r--r--	2023-06-23 15:59
class-wp-block-type-registry.php	4.9 KB	-rw-r--r--	2023-10-12 22:04
class-wp-block-type.php	16.81 KB	-rw-r--r--	2024-02-16 23:25
class-wp-block.php	16.71 KB	-rw-r--r--	2024-02-23 19:50
class-wp-classic-to-block-menu-converter.php	3.99 KB	-rw-r--r--	2023-08-22 03:21
class-wp-comment-query.php	46.86 KB	-rw-r--r--	2024-03-03 00:08
class-wp-comment.php	9.15 KB	-rw-r--r--	2023-08-24 18:14
class-wp-customize-control.php	25.25 KB	-rw-r--r--	2024-01-28 18:20
class-wp-customize-manager.php	197.52 KB	-rw-r--r--	2024-03-05 10:42
class-wp-customize-nav-menus.php	55.99 KB	-rw-r--r--	2024-02-17 08:17
class-wp-customize-panel.php	10.42 KB	-rw-r--r--	2023-09-10 18:34
class-wp-customize-section.php	10.98 KB	-rw-r--r--	2023-09-10 18:34
class-wp-customize-setting.php	29.19 KB	-rw-r--r--	2023-09-10 18:34
class-wp-customize-widgets.php	69.93 KB	-rw-r--r--	2024-01-19 08:43
class-wp-date-query.php	34.89 KB	-rw-r--r--	2024-02-17 08:17
class-wp-dependencies.php	13.73 KB	-rw-r--r--	2023-09-08 19:02
class-wp-dependency.php	2.57 KB	-rw-r--r--	2022-11-26 01:42
class-wp-duotone.php	38.61 KB	-rw-r--r--	2024-02-19 01:29
class-wp-editor.php	70.47 KB	-rw-r--r--	2023-12-16 20:01
class-wp-embed.php	15.62 KB	-rw-r--r--	2023-07-10 05:47
class-wp-error.php	7.33 KB	-rw-r--r--	2023-02-22 03:09
class-wp-fatal-error-handler.php	7.76 KB	-rw-r--r--	2023-12-16 20:08
class-wp-feed-cache-transient.php	2.53 KB	-rw-r--r--	2022-09-13 01:17
class-wp-feed-cache.php	969 B	-rw-r--r--	2023-08-10 10:36
class-wp-hook.php	15.63 KB	-rw-r--r--	2023-09-18 22:11
class-wp-http-cookie.php	7.22 KB	-rw-r--r--	2023-06-25 02:47
class-wp-http-curl.php	12.25 KB	-rw-r--r--	2023-09-22 03:59
class-wp-http-encoding.php	6.53 KB	-rw-r--r--	2023-06-23 00:27
class-wp-http-ixr-client.php	3.42 KB	-rw-r--r--	2022-09-13 01:17
class-wp-http-proxy.php	5.84 KB	-rw-r--r--	2023-06-23 00:06
class-wp-http-requests-hooks.php	1.97 KB	-rw-r--r--	2022-12-16 08:02
class-wp-http-requests-response.php	4.3 KB	-rw-r--r--	2023-10-11 16:35
class-wp-http-response.php	2.91 KB	-rw-r--r--	2022-09-13 01:17
class-wp-http-streams.php	16.46 KB	-rw-r--r--	2023-09-22 03:59
class-wp-http.php	39.76 KB	-rw-r--r--	2024-02-17 08:17
class-wp-image-editor-gd.php	18.44 KB	-rw-r--r--	2024-02-13 22:24
class-wp-image-editor-imagick.php	31.35 KB	-rw-r--r--	2024-02-13 22:56
class-wp-image-editor.php	17.19 KB	-rw-r--r--	2024-02-03 04:18
class-wp-list-util.php	7.27 KB	-rw-r--r--	2024-02-28 09:08
class-wp-locale-switcher.php	6.47 KB	-rw-r--r--	2024-01-25 18:23
class-wp-locale.php	15.74 KB	-rw-r--r--	2023-07-10 06:55
class-wp-matchesmapregex.php	1.79 KB	-rw-r--r--	2024-02-06 11:55
class-wp-meta-query.php	29.82 KB	-rw-r--r--	2023-09-09 18:58
class-wp-metadata-lazyloader.php	6.67 KB	-rw-r--r--	2023-05-11 20:45
class-wp-navigation-fallback.php	9 KB	-rw-r--r--	2023-10-06 23:36
class-wp-network-query.php	18.99 KB	-rw-r--r--	2024-03-03 00:08
class-wp-network.php	11.9 KB	-rw-r--r--	2023-07-12 19:16
class-wp-object-cache.php	17.18 KB	-rw-r--r--	2023-03-15 02:25
class-wp-oembed-controller.php	6.72 KB	-rw-r--r--	2022-11-14 00:21
class-wp-oembed.php	30.66 KB	-rw-r--r--	2023-07-10 06:55
class-wp-paused-extensions-storage.php	4.97 KB	-rw-r--r--	2024-02-17 08:17
class-wp-plugin-dependencies.php	24.8 KB	-rw-r--r--	2024-05-31 01:51
class-wp-post-type.php	29.28 KB	-rw-r--r--	2024-02-14 01:43
class-wp-post.php	6.33 KB	-rw-r--r--	2022-09-13 01:17
class-wp-query.php	148.28 KB	-rw-r--r--	2024-03-05 01:18
class-wp-recovery-mode-cookie-service.php	6.72 KB	-rw-r--r--	2022-10-04 13:29
class-wp-recovery-mode-email-service.php	10.92 KB	-rw-r--r--	2023-05-03 01:15
class-wp-recovery-mode-key-service.php	4.49 KB	-rw-r--r--	2023-12-24 23:35
class-wp-recovery-mode-link-service.php	3.38 KB	-rw-r--r--	2022-09-13 01:17
class-wp-recovery-mode.php	11.17 KB	-rw-r--r--	2023-05-03 01:15
class-wp-rewrite.php	61.94 KB	-rw-r--r--	2023-09-09 18:58
class-wp-role.php	2.46 KB	-rw-r--r--	2023-09-08 19:02
class-wp-roles.php	8.38 KB	-rw-r--r--	2023-07-28 21:07
class-wp-script-modules.php	13.16 KB	-rw-r--r--	2024-03-16 00:31
class-wp-scripts.php	27.25 KB	-rw-r--r--	2024-02-05 20:13
class-wp-session-tokens.php	7.28 KB	-rw-r--r--	2022-09-13 01:17
class-wp-simplepie-file.php	3.3 KB	-rw-r--r--	2023-08-10 10:36
class-wp-simplepie-sanitize-kses.php	1.73 KB	-rw-r--r--	2023-08-10 10:36
class-wp-site-query.php	30.4 KB	-rw-r--r--	2024-03-03 00:08
class-wp-site.php	7.28 KB	-rw-r--r--	2022-09-13 01:17
class-wp-styles.php	10.64 KB	-rw-r--r--	2023-05-03 01:15
class-wp-tax-query.php	19.1 KB	-rw-r--r--	2024-02-17 08:17
class-wp-taxonomy.php	18.13 KB	-rw-r--r--	2023-04-28 08:45
class-wp-term-query.php	40.2 KB	-rw-r--r--	2024-03-03 00:08
class-wp-term.php	5.17 KB	-rw-r--r--	2022-09-13 01:17
class-wp-text-diff-renderer-inline.php	979 B	-rw-r--r--	2024-02-15 05:57
class-wp-text-diff-renderer-table.php	18.37 KB	-rw-r--r--	2023-10-16 00:25
class-wp-textdomain-registry.php	9.64 KB	-rw-r--r--	2024-03-15 20:50
class-wp-theme-json-data.php	1.52 KB	-rw-r--r--	2023-09-08 19:02
class-wp-theme-json-resolver.php	24.6 KB	-rw-r--r--	2024-03-28 17:56
class-wp-theme-json-schema.php	4.12 KB	-rw-r--r--	2023-10-02 20:57
class-wp-theme-json.php	132.21 KB	-rw-r--r--	2024-04-30 12:55
class-wp-theme.php	62.81 KB	-rw-r--r--	2024-02-13 19:24
class-wp-user-meta-session-tokens.php	2.92 KB	-rw-r--r--	2019-01-09 15:34
class-wp-user-query.php	42.5 KB	-rw-r--r--	2024-03-03 00:08
class-wp-user-request.php	2.17 KB	-rw-r--r--	2022-09-13 01:17
class-wp-user.php	22.29 KB	-rw-r--r--	2024-02-17 08:17
class-wp-walker.php	12.87 KB	-rw-r--r--	2024-02-18 01:54
class-wp-widget-factory.php	3.27 KB	-rw-r--r--	2022-09-13 01:17
class-wp-widget.php	17.96 KB	-rw-r--r--	2023-08-25 10:58
class-wp-xmlrpc-server.php	209.91 KB	-rw-r--r--	2024-02-12 05:44
class-wp.php	25.51 KB	-rw-r--r--	2023-08-13 20:01
class-wpdb.php	116.67 KB	-rw-r--r--	2024-01-04 08:29
class.wp-dependencies.php	373 B	-rw-r--r--	2022-09-20 23:47
class.wp-scripts.php	343 B	-rw-r--r--	2022-09-20 23:47
class.wp-styles.php	338 B	-rw-r--r--	2022-09-20 23:47
comment-template.php	99.25 KB	-rw-r--r--	2024-02-22 05:56
comment.php	126.1 KB	-rw-r--r--	2024-02-18 01:54
compat.php	15.85 KB	-rw-r--r--	2024-02-03 04:18
cron.php	40.51 KB	-rw-r--r--	2024-01-04 08:29
date.php	400 B	-rw-r--r--	2022-06-17 20:50
default-constants.php	10.91 KB	-rw-r--r--	2023-09-27 03:03
default-filters.php	34.18 KB	-rw-r--r--	2024-04-24 21:32
default-widgets.php	2.17 KB	-rw-r--r--	2021-05-25 17:57
deprecated.php	181.5 KB	-rw-r--r--	2024-02-22 05:59
embed-template.php	338 B	-rw-r--r--	2022-06-17 20:50
embed.php	36.79 KB	-rw-r--r--	2024-02-18 01:54
error-protection.php	4.02 KB	-rw-r--r--	2023-05-03 01:15
feed-atom-comments.php	5.38 KB	-rw-r--r--	2024-03-04 23:11
feed-atom.php	2.98 KB	-rw-r--r--	2021-11-29 20:22
feed-rdf.php	2.61 KB	-rw-r--r--	2020-01-29 11:15
feed-rss.php	1.16 KB	-rw-r--r--	2020-01-29 11:15
feed-rss2-comments.php	4.04 KB	-rw-r--r--	2024-03-04 23:11
feed-rss2.php	3.71 KB	-rw-r--r--	2020-01-29 11:15
feed.php	22.52 KB	-rw-r--r--	2023-07-10 07:18
fonts.php	9.17 KB	-rw-r--r--	2024-06-21 02:00
formatting.php	327.9 KB	-rw-r--r--	2024-06-25 00:34
functions.php	271.91 KB	-rw-r--r--	2024-06-25 00:34
functions.wp-scripts.php	14.22 KB	-rw-r--r--	2024-05-03 00:36
functions.wp-styles.php	8.38 KB	-rw-r--r--	2023-01-16 01:27
general-template.php	164 KB	-rw-r--r--	2024-02-17 08:17
global-styles-and-settings.php	20.76 KB	-rw-r--r--	2024-02-07 15:07
http.php	23.29 KB	-rw-r--r--	2023-08-03 21:40
https-detection.php	5.53 KB	-rw-r--r--	2023-09-23 04:38
https-migration.php	4.63 KB	-rw-r--r--	2023-07-11 08:08
kses.php	70.26 KB	-rw-r--r--	2023-12-27 00:54
l10n.php	63.86 KB	-rw-r--r--	2024-04-30 19:17
link-template.php	152.42 KB	-rw-r--r--	2024-01-29 03:10
load.php	53.69 KB	-rw-r--r--	2024-03-15 20:50
locale.php	162 B	-rw-r--r--	2019-10-09 02:49
media-template.php	60.37 KB	-rw-r--r--	2023-09-27 00:15
media.php	205.28 KB	-rw-r--r--	2024-02-22 22:26
meta.php	62.58 KB	-rw-r--r--	2023-09-27 01:02
ms-blogs.php	25.13 KB	-rw-r--r--	2024-02-13 19:24
ms-default-constants.php	4.79 KB	-rw-r--r--	2023-07-11 08:18
ms-default-filters.php	6.48 KB	-rw-r--r--	2023-02-24 11:53
ms-deprecated.php	21.25 KB	-rw-r--r--	2023-06-23 00:27
ms-files.php	2.65 KB	-rw-r--r--	2023-08-24 01:23
ms-functions.php	89.1 KB	-rw-r--r--	2023-11-13 21:43
ms-load.php	19.4 KB	-rw-r--r--	2023-07-11 08:18
ms-network.php	3.69 KB	-rw-r--r--	2023-05-02 20:56
ms-settings.php	4.03 KB	-rw-r--r--	2023-06-23 00:27
ms-site.php	39.55 KB	-rw-r--r--	2023-09-09 18:58
nav-menu-template.php	25.18 KB	-rw-r--r--	2024-01-02 00:47
nav-menu.php	43.04 KB	-rw-r--r--	2023-07-11 08:18
option.php	89.21 KB	-rw-r--r--	2023-11-14 23:14
pluggable-deprecated.php	6.12 KB	-rw-r--r--	2020-01-12 05:02
pluggable.php	110.49 KB	-rw-r--r--	2024-02-22 21:28
plugin.php	34.63 KB	-rw-r--r--	2023-06-08 17:24
post-formats.php	6.93 KB	-rw-r--r--	2023-02-22 03:09
post-template.php	65.23 KB	-rw-r--r--	2023-08-22 22:00
post-thumbnail-template.php	10.07 KB	-rw-r--r--	2023-05-18 04:01
post.php	275.23 KB	-rw-r--r--	2024-03-16 06:28
query.php	36.17 KB	-rw-r--r--	2023-08-24 18:31
registration-functions.php	200 B	-rw-r--r--	2020-11-12 21:47
registration.php	200 B	-rw-r--r--	2020-11-12 21:47
rest-api.php	96.16 KB	-rw-r--r--	2024-02-22 20:24
revision.php	30.18 KB	-rw-r--r--	2023-10-23 22:47
rewrite.php	19.06 KB	-rw-r--r--	2023-07-11 20:45
robots-template.php	5.06 KB	-rw-r--r--	2022-04-07 01:03
rss-functions.php	255 B	-rw-r--r--	2020-11-17 09:22
rss.php	22.54 KB	-rw-r--r--	2024-01-28 18:49
script-loader.php	127.46 KB	-rw-r--r--	2024-02-27 06:48
script-modules.php	5.88 KB	-rw-r--r--	2024-02-17 08:17
session.php	258 B	-rw-r--r--	2020-02-06 17:03
shortcodes.php	23.39 KB	-rw-r--r--	2024-02-23 02:23
sitemaps.php	3.16 KB	-rw-r--r--	2021-05-16 03:08
spl-autoload-compat.php	441 B	-rw-r--r--	2020-11-12 21:47
style-engine.php	7.03 KB	-rw-r--r--	2023-09-14 14:26
taxonomy.php	170.9 KB	-rw-r--r--	2024-02-17 08:17
template-canvas.php	544 B	-rw-r--r--	2023-10-01 09:52
template-loader.php	2.94 KB	-rw-r--r--	2020-05-26 19:07
template.php	23.59 KB	-rw-r--r--	2024-02-22 05:56
theme-i18n.json	1.12 KB	-rw-r--r--	2022-09-21 21:13
theme-previews.php	2.77 KB	-rw-r--r--	2023-12-08 17:02
theme-templates.php	6.08 KB	-rw-r--r--	2023-10-14 02:51
theme.json	7.19 KB	-rw-r--r--	2024-03-28 17:56
theme.php	129.98 KB	-rw-r--r--	2024-02-22 05:56
update.php	35.96 KB	-rw-r--r--	2023-09-13 00:53
user.php	167.56 KB	-rw-r--r--	2024-02-26 21:13
vars.php	6.24 KB	-rw-r--r--	2024-02-13 20:41
version.php	930 B	-rw-r--r--	2024-06-25 01:35
widgets.php	68.95 KB	-rw-r--r--	2024-01-28 18:49
wp-blog-header.php	2.73 KB	-r--r--r--	2025-05-03 06:31
wp-cron.php	2.73 KB	-rw-r--r--	2025-05-03 06:31
wp-db.php	445 B	-rw-r--r--	2022-07-22 08:15
wp-diff.php	647 B	-rw-r--r--	2020-02-06 17:03

Rename

<?php
/**
 * A class for displaying various tree-like structures.
 *
 * Extend the Walker class to use it, see examples below. Child classes
 * do not need to implement all of the abstract methods in the class. The child
 * only needs to implement the methods that are needed.
 *
 * @since 2.1.0
 *
 * @package WordPress
 * @abstract
 */
#[AllowDynamicProperties]
class Walker {
	/**
	 * What the class handles.
	 *
	 * @since 2.1.0
	 * @var string
	 */
	public $tree_type;

/**
	 * DB fields to use.
	 *
	 * @since 2.1.0
	 * @var string[]
	 */
	public $db_fields;

/**
	 * Max number of pages walked by the paged walker.
	 *
	 * @since 2.7.0
	 * @var int
	 */
	public $max_pages = 1;

/**
	 * Whether the current element has children or not.
	 *
	 * To be used in start_el().
	 *
	 * @since 4.0.0
	 * @var bool
	 */
	public $has_children;

/**
	 * Starts the list before the elements are added.
	 *
	 * The $args parameter holds additional values that may be used with the child
	 * class methods. This method is called at the start of the output list.
	 *
	 * @since 2.1.0
	 * @abstract
	 *
	 * @param string $output Used to append additional content (passed by reference).
	 * @param int    $depth  Depth of the item.
	 * @param array  $args   An array of additional arguments.
	 */
	public function start_lvl( &$output, $depth = 0, $args = array() ) {}

/**
	 * Ends the list of after the elements are added.
	 *
	 * The $args parameter holds additional values that may be used with the child
	 * class methods. This method finishes the list at the end of output of the elements.
	 *
	 * @since 2.1.0
	 * @abstract
	 *
	 * @param string $output Used to append additional content (passed by reference).
	 * @param int    $depth  Depth of the item.
	 * @param array  $args   An array of additional arguments.
	 */
	public function end_lvl( &$output, $depth = 0, $args = array() ) {}

/**
	 * Starts the element output.
	 *
	 * The $args parameter holds additional values that may be used with the child
	 * class methods. Also includes the element output.
	 *
	 * @since 2.1.0
	 * @since 5.9.0 Renamed `$object` (a PHP reserved keyword) to `$data_object` for PHP 8 named parameter support.
	 * @abstract
	 *
	 * @param string $output            Used to append additional content (passed by reference).
	 * @param object $data_object       The data object.
	 * @param int    $depth             Depth of the item.
	 * @param array  $args              An array of additional arguments.
	 * @param int    $current_object_id Optional. ID of the current item. Default 0.
	 */
	public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {}

/**
	 * Ends the element output, if needed.
	 *
	 * The $args parameter holds additional values that may be used with the child class methods.
	 *
	 * @since 2.1.0
	 * @since 5.9.0 Renamed `$object` (a PHP reserved keyword) to `$data_object` for PHP 8 named parameter support.
	 * @abstract
	 *
	 * @param string $output      Used to append additional content (passed by reference).
	 * @param object $data_object The data object.
	 * @param int    $depth       Depth of the item.
	 * @param array  $args        An array of additional arguments.
	 */
	public function end_el( &$output, $data_object, $depth = 0, $args = array() ) {}

/**
	 * Traverses elements to create list from elements.
	 *
	 * Display one element if the element doesn't have any children otherwise,
	 * display the element and its children. Will only traverse up to the max
	 * depth and no ignore elements under that depth. It is possible to set the
	 * max depth to include all depths, see walk() method.
	 *
	 * This method should not be called directly, use the walk() method instead.
	 *
	 * @since 2.5.0
	 *
	 * @param object $element           Data object.
	 * @param array  $children_elements List of elements to continue traversing (passed by reference).
	 * @param int    $max_depth         Max depth to traverse.
	 * @param int    $depth             Depth of current element.
	 * @param array  $args              An array of arguments.
	 * @param string $output            Used to append additional content (passed by reference).
	 */
	public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {
		if ( ! $element ) {
			return;
		}

$id_field = $this->db_fields['id'];
		$id       = $element->$id_field;

// Display this element.
		$this->has_children = ! empty( $children_elements[ $id ] );
		if ( isset( $args[0] ) && is_array( $args[0] ) ) {
			$args[0]['has_children'] = $this->has_children; // Back-compat.
		}

$this->start_el( $output, $element, $depth, ...array_values( $args ) );

// Descend only when the depth is right and there are children for this element.
		if ( ( 0 == $max_depth || $max_depth > $depth + 1 ) && isset( $children_elements[ $id ] ) ) {

foreach ( $children_elements[ $id ] as $child ) {

if ( ! isset( $newlevel ) ) {
					$newlevel = true;
					// Start the child delimiter.
					$this->start_lvl( $output, $depth, ...array_values( $args ) );
				}
				$this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );
			}
			unset( $children_elements[ $id ] );
		}

if ( isset( $newlevel ) && $newlevel ) {
			// End the child delimiter.
			$this->end_lvl( $output, $depth, ...array_values( $args ) );
		}

// End this element.
		$this->end_el( $output, $element, $depth, ...array_values( $args ) );
	}

/**
	 * Displays array of elements hierarchically.
	 *
	 * Does not assume any existing order of elements.
	 *
	 * $max_depth = -1 means flatly display every element.
	 * $max_depth = 0 means display all levels.
	 * $max_depth > 0 specifies the number of display levels.
	 *
	 * @since 2.1.0
	 * @since 5.3.0 Formalized the existing `...$args` parameter by adding it
	 *              to the function signature.
	 *
	 * @param array $elements  An array of elements.
	 * @param int   $max_depth The maximum hierarchical depth.
	 * @param mixed ...$args   Optional additional arguments.
	 * @return string The hierarchical item output.
	 */
	public function walk( $elements, $max_depth, ...$args ) {
		$output = '';

// Invalid parameter or nothing to walk.
		if ( $max_depth < -1 || empty( $elements ) ) {
			return $output;
		}

$parent_field = $this->db_fields['parent'];

// Flat display.
		if ( -1 == $max_depth ) {
			$empty_array = array();
			foreach ( $elements as $e ) {
				$this->display_element( $e, $empty_array, 1, 0, $args, $output );
			}
			return $output;
		}

/*
		 * Need to display in hierarchical order.
		 * Separate elements into two buckets: top level and children elements.
		 * Children_elements is two dimensional array. Example:
		 * Children_elements[10][] contains all sub-elements whose parent is 10.
		 */
		$top_level_elements = array();
		$children_elements  = array();
		foreach ( $elements as $e ) {
			if ( empty( $e->$parent_field ) ) {
				$top_level_elements[] = $e;
			} else {
				$children_elements[ $e->$parent_field ][] = $e;
			}
		}

/*
		 * When none of the elements is top level.
		 * Assume the first one must be root of the sub elements.
		 */
		if ( empty( $top_level_elements ) ) {

$first = array_slice( $elements, 0, 1 );
			$root  = $first[0];

$top_level_elements = array();
			$children_elements  = array();
			foreach ( $elements as $e ) {
				if ( $root->$parent_field == $e->$parent_field ) {
					$top_level_elements[] = $e;
				} else {
					$children_elements[ $e->$parent_field ][] = $e;
				}
			}
		}

foreach ( $top_level_elements as $e ) {
			$this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
		}

/*
		 * If we are displaying all levels, and remaining children_elements is not empty,
		 * then we got orphans, which should be displayed regardless.
		 */
		if ( ( 0 == $max_depth ) && count( $children_elements ) > 0 ) {
			$empty_array = array();
			foreach ( $children_elements as $orphans ) {
				foreach ( $orphans as $op ) {
					$this->display_element( $op, $empty_array, 1, 0, $args, $output );
				}
			}
		}

return $output;
	}

/**
	 * Produces a page of nested elements.
	 *
	 * Given an array of hierarchical elements, the maximum depth, a specific page number,
	 * and number of elements per page, this function first determines all top level root elements
	 * belonging to that page, then lists them and all of their children in hierarchical order.
	 *
	 * $max_depth = 0 means display all levels.
	 * $max_depth > 0 specifies the number of display levels.
	 *
	 * @since 2.7.0
	 * @since 5.3.0 Formalized the existing `...$args` parameter by adding it
	 *              to the function signature.
	 *
	 * @param array $elements  An array of elements.
	 * @param int   $max_depth The maximum hierarchical depth.
	 * @param int   $page_num  The specific page number, beginning with 1.
	 * @param int   $per_page  Number of elements per page.
	 * @param mixed ...$args   Optional additional arguments.
	 * @return string XHTML of the specified page of elements.
	 */
	public function paged_walk( $elements, $max_depth, $page_num, $per_page, ...$args ) {
		if ( empty( $elements ) || $max_depth < -1 ) {
			return '';
		}

$output = '';

$parent_field = $this->db_fields['parent'];

$count = -1;
		if ( -1 == $max_depth ) {
			$total_top = count( $elements );
		}
		if ( $page_num < 1 || $per_page < 0 ) {
			// No paging.
			$paging = false;
			$start  = 0;
			if ( -1 == $max_depth ) {
				$end = $total_top;
			}
			$this->max_pages = 1;
		} else {
			$paging = true;
			$start  = ( (int) $page_num - 1 ) * (int) $per_page;
			$end    = $start + $per_page;
			if ( -1 == $max_depth ) {
				$this->max_pages = (int) ceil( $total_top / $per_page );
			}
		}

// Flat display.
		if ( -1 == $max_depth ) {
			if ( ! empty( $args[0]['reverse_top_level'] ) ) {
				$elements = array_reverse( $elements );
				$oldstart = $start;
				$start    = $total_top - $end;
				$end      = $total_top - $oldstart;
			}

$empty_array = array();
			foreach ( $elements as $e ) {
				++$count;
				if ( $count < $start ) {
					continue;
				}
				if ( $count >= $end ) {
					break;
				}
				$this->display_element( $e, $empty_array, 1, 0, $args, $output );
			}
			return $output;
		}

/*
		 * Separate elements into two buckets: top level and children elements.
		 * Children_elements is two dimensional array, e.g.
		 * $children_elements[10][] contains all sub-elements whose parent is 10.
		 */
		$top_level_elements = array();
		$children_elements  = array();
		foreach ( $elements as $e ) {
			if ( empty( $e->$parent_field ) ) {
				$top_level_elements[] = $e;
			} else {
				$children_elements[ $e->$parent_field ][] = $e;
			}
		}

$total_top = count( $top_level_elements );
		if ( $paging ) {
			$this->max_pages = (int) ceil( $total_top / $per_page );
		} else {
			$end = $total_top;
		}

if ( ! empty( $args[0]['reverse_top_level'] ) ) {
			$top_level_elements = array_reverse( $top_level_elements );
			$oldstart           = $start;
			$start              = $total_top - $end;
			$end                = $total_top - $oldstart;
		}
		if ( ! empty( $args[0]['reverse_children'] ) ) {
			foreach ( $children_elements as $parent => $children ) {
				$children_elements[ $parent ] = array_reverse( $children );
			}
		}

foreach ( $top_level_elements as $e ) {
			++$count;

// For the last page, need to unset earlier children in order to keep track of orphans.
			if ( $end >= $total_top && $count < $start ) {
					$this->unset_children( $e, $children_elements );
			}

if ( $count < $start ) {
				continue;
			}

if ( $count >= $end ) {
				break;
			}

$this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
		}

if ( $end >= $total_top && count( $children_elements ) > 0 ) {
			$empty_array = array();
			foreach ( $children_elements as $orphans ) {
				foreach ( $orphans as $op ) {
					$this->display_element( $op, $empty_array, 1, 0, $args, $output );
				}
			}
		}

return $output;
	}

/**
	 * Calculates the total number of root elements.
	 *
	 * @since 2.7.0
	 *
	 * @param array $elements Elements to list.
	 * @return int Number of root elements.
	 */
	public function get_number_of_root_elements( $elements ) {
		$num          = 0;
		$parent_field = $this->db_fields['parent'];

foreach ( $elements as $e ) {
			if ( empty( $e->$parent_field ) ) {
				++$num;
			}
		}
		return $num;
	}

/**
	 * Unsets all the children for a given top level element.
	 *
	 * @since 2.7.0
	 *
	 * @param object $element           The top level element.
	 * @param array  $children_elements The children elements.
	 */
	public function unset_children( $element, &$children_elements ) {
		if ( ! $element || ! $children_elements ) {
			return;
		}

$id_field = $this->db_fields['id'];
		$id       = $element->$id_field;

if ( ! empty( $children_elements[ $id ] ) && is_array( $children_elements[ $id ] ) ) {
			foreach ( (array) $children_elements[ $id ] as $child ) {
				$this->unset_children( $child, $children_elements );
			}
		}

unset( $children_elements[ $id ] );
	}
}