Gecko [ www.prositehelp.com ]

Name	Size	Permission	Date
ID3	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
IXR	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
PHPMailer	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
Requests	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
SimplePie	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
Text	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
assets	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
block-patterns	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
block-supports	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
blocks	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
certificates	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
css	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
customize	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
fonts	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
html-api	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
images	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
js	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
php-compat	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
pomo	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
rest-api	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
sitemaps	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
sodium_compat	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
style-engine	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
theme-compat	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
widgets	[ DIR ]	drwxr-xr-x	2026-06-11 03:55
.htaccess	517 B	-r-xr-xr-x	2026-06-11 03:55
admin-bar.php	35.15 KB	-rw-r--r--	2023-09-26 16:29
atomlib.php	11.67 KB	-rw-r--r--	2022-04-21 11:24
author-template.php	18.51 KB	-rw-r--r--	2023-05-14 17:58
block-editor.php	27.27 KB	-rw-r--r--	2023-09-27 17:40
block-i18n.json	316 B	-rw-r--r--	2021-08-11 09:08
block-patterns.php	12.64 KB	-rw-r--r--	2023-11-10 16:00
block-template-utils.php	47.35 KB	-rw-r--r--	2023-11-17 07:17
block-template.php	12 KB	-rw-r--r--	2023-10-27 18:36
blocks.php	71.18 KB	-rw-r--r--	2024-06-24 22:30
bookmark-template.php	12.61 KB	-rw-r--r--	2023-06-22 14:57
bookmark.php	15.02 KB	-rw-r--r--	2023-07-09 20:17
cache-compat.php	5.83 KB	-rw-r--r--	2022-10-10 18:22
cache.php	13.16 KB	-rw-r--r--	2022-10-10 18:22
canonical.php	33.27 KB	-rw-r--r--	2024-01-25 19:43
capabilities.php	39.09 KB	-rw-r--r--	2023-07-09 20:17
category-template.php	55.67 KB	-rw-r--r--	2023-09-26 00:27
category.php	12.41 KB	-rw-r--r--	2023-08-24 09:01
class-IXR.php	2.48 KB	-rw-r--r--	2020-02-06 06:33
class-feed.php	529 B	-rw-r--r--	2020-02-06 06:33
class-http.php	367 B	-rw-r--r--	2022-06-17 11:20
class-json.php	42.66 KB	-rw-r--r--	2023-02-03 13:35
class-oembed.php	401 B	-rw-r--r--	2022-06-17 11:20
class-phpass.php	6.55 KB	-rw-r--r--	2023-02-13 09:08
class-phpmailer.php	664 B	-rw-r--r--	2020-07-21 12:58
class-pop3.php	20.48 KB	-rw-r--r--	2023-02-11 12:43
class-requests.php	2.18 KB	-rw-r--r--	2023-04-05 13:12
class-simplepie.php	95.82 KB	-rw-r--r--	2023-05-12 21:35
class-smtp.php	457 B	-rw-r--r--	2021-01-26 13:45
class-snoopy.php	36.83 KB	-rw-r--r--	2023-02-03 13:35
class-walker-category-dropdown.php	2.41 KB	-rw-r--r--	2023-09-14 12:46
class-walker-category.php	8.28 KB	-rw-r--r--	2023-09-08 09:32
class-walker-comment.php	13.88 KB	-rw-r--r--	2023-09-09 09:28
class-walker-nav-menu.php	11.05 KB	-rw-r--r--	2023-06-27 15:26
class-walker-page-dropdown.php	2.65 KB	-rw-r--r--	2023-09-14 12:46
class-walker-page.php	7.43 KB	-rw-r--r--	2023-09-14 12:46
class-wp-admin-bar.php	16.96 KB	-rw-r--r--	2023-07-09 20:17
class-wp-ajax-response.php	5.14 KB	-rw-r--r--	2022-09-12 15:47
class-wp-application-passwords.php	12.55 KB	-rw-r--r--	2023-05-08 22:37
class-wp-block-editor-context.php	1.32 KB	-rw-r--r--	2022-09-12 15:47
class-wp-block-list.php	4.66 KB	-rw-r--r--	2023-10-09 11:23
class-wp-block-parser-block.php	2.5 KB	-rw-r--r--	2023-06-27 00:45
class-wp-block-parser-frame.php	1.87 KB	-rw-r--r--	2023-06-27 00:45
class-wp-block-parser.php	11.26 KB	-rw-r--r--	2023-10-16 19:17
class-wp-block-pattern-categories-registry.php	5.25 KB	-rw-r--r--	2022-09-12 15:47
class-wp-block-patterns-registry.php	9.84 KB	-rw-r--r--	2023-10-17 15:48
class-wp-block-styles-registry.php	5.75 KB	-rw-r--r--	2022-09-12 15:47
class-wp-block-supports.php	5.39 KB	-rw-r--r--	2023-09-29 10:20
class-wp-block-template.php	1.91 KB	-rw-r--r--	2023-06-23 06:29
class-wp-block-type-registry.php	4.9 KB	-rw-r--r--	2023-10-12 12:34
class-wp-block-type.php	14.4 KB	-rw-r--r--	2023-09-14 13:25
class-wp-block.php	8.2 KB	-rw-r--r--	2023-09-09 09:28
class-wp-classic-to-block-menu-converter.php	3.99 KB	-rw-r--r--	2023-08-21 17:51
class-wp-comment-query.php	46.71 KB	-rw-r--r--	2023-09-09 09:28
class-wp-comment.php	9.15 KB	-rw-r--r--	2023-08-24 08:44
class-wp-customize-control.php	25.24 KB	-rw-r--r--	2023-09-08 09:32
class-wp-customize-manager.php	197.52 KB	-rw-r--r--	2023-09-29 21:39
class-wp-customize-nav-menus.php	56.22 KB	-rw-r--r--	2025-10-01 09:59
class-wp-customize-panel.php	10.42 KB	-rw-r--r--	2023-09-10 09:04
class-wp-customize-section.php	10.98 KB	-rw-r--r--	2023-09-10 09:04
class-wp-customize-setting.php	29.19 KB	-rw-r--r--	2023-09-10 09:04
class-wp-customize-widgets.php	69.93 KB	-rw-r--r--	2023-09-25 21:05
class-wp-date-query.php	34.88 KB	-rw-r--r--	2023-06-22 14:36
class-wp-dependencies.php	13.73 KB	-rw-r--r--	2023-09-08 09:32
class-wp-dependency.php	2.57 KB	-rw-r--r--	2022-11-25 15:12
class-wp-duotone.php	38.52 KB	-rw-r--r--	2023-10-24 11:08
class-wp-editor.php	70.39 KB	-rw-r--r--	2023-07-14 20:59
class-wp-embed.php	15.62 KB	-rw-r--r--	2023-07-09 20:17
class-wp-error.php	7.33 KB	-rw-r--r--	2023-02-21 16:39
class-wp-fatal-error-handler.php	7.69 KB	-rw-r--r--	2023-02-23 10:38
class-wp-feed-cache-transient.php	2.53 KB	-rw-r--r--	2022-09-12 15:47
class-wp-feed-cache.php	969 B	-rw-r--r--	2023-08-10 01:06
class-wp-hook.php	15.63 KB	-rw-r--r--	2023-09-18 12:41
class-wp-http-cookie.php	7.22 KB	-rw-r--r--	2023-06-24 17:17
class-wp-http-curl.php	12.25 KB	-rw-r--r--	2023-09-21 18:29
class-wp-http-encoding.php	6.53 KB	-rw-r--r--	2023-06-22 14:57
class-wp-http-ixr-client.php	3.42 KB	-rw-r--r--	2026-03-11 09:54
class-wp-http-proxy.php	5.84 KB	-rw-r--r--	2023-06-22 14:36
class-wp-http-requests-hooks.php	1.97 KB	-rw-r--r--	2022-12-15 21:32
class-wp-http-requests-response.php	4.3 KB	-rw-r--r--	2023-10-11 07:05
class-wp-http-response.php	2.91 KB	-rw-r--r--	2022-09-12 15:47
class-wp-http-streams.php	16.46 KB	-rw-r--r--	2023-09-21 18:29
class-wp-http.php	39.63 KB	-rw-r--r--	2023-09-26 16:55
class-wp-image-editor-gd.php	17.11 KB	-rw-r--r--	2023-08-19 00:10
class-wp-image-editor-imagick.php	30.47 KB	-rw-r--r--	2023-09-08 09:32
class-wp-image-editor.php	17.17 KB	-rw-r--r--	2023-09-07 14:59
class-wp-list-util.php	7.27 KB	-rw-r--r--	2023-09-09 09:28
class-wp-locale-switcher.php	6.41 KB	-rw-r--r--	2023-07-09 21:25
class-wp-locale.php	15.74 KB	-rw-r--r--	2023-07-09 21:25
class-wp-matchesmapregex.php	1.78 KB	-rw-r--r--	2022-09-12 15:47
class-wp-meta-query.php	29.82 KB	-rw-r--r--	2023-09-09 09:28
class-wp-metadata-lazyloader.php	6.67 KB	-rw-r--r--	2023-05-11 11:15
class-wp-navigation-fallback.php	9 KB	-rw-r--r--	2023-10-06 14:06
class-wp-network-query.php	18.84 KB	-rw-r--r--	2023-03-10 16:30
class-wp-network.php	11.9 KB	-rw-r--r--	2023-07-12 09:46
class-wp-object-cache.php	17.18 KB	-rw-r--r--	2023-03-14 16:55
class-wp-oembed-controller.php	6.72 KB	-rw-r--r--	2022-11-13 13:51
class-wp-oembed.php	30.66 KB	-rw-r--r--	2023-07-09 21:25
class-wp-paused-extensions-storage.php	4.94 KB	-rw-r--r--	2022-09-12 15:47
class-wp-post-type.php	29.28 KB	-rw-r--r--	2023-10-10 14:05
class-wp-post.php	6.33 KB	-rw-r--r--	2022-09-12 15:47
class-wp-query.php	148.03 KB	-rw-r--r--	2023-10-12 23:41
class-wp-recovery-mode-cookie-service.php	6.72 KB	-rw-r--r--	2022-10-04 03:59
class-wp-recovery-mode-email-service.php	10.92 KB	-rw-r--r--	2023-05-02 15:45
class-wp-recovery-mode-key-service.php	4.4 KB	-rw-r--r--	2023-02-21 15:59
class-wp-recovery-mode-link-service.php	3.38 KB	-rw-r--r--	2022-09-12 15:47
class-wp-recovery-mode.php	11.17 KB	-rw-r--r--	2023-05-02 15:45
class-wp-rewrite.php	61.94 KB	-rw-r--r--	2023-09-09 09:28
class-wp-role.php	2.46 KB	-rw-r--r--	2023-09-08 09:32
class-wp-roles.php	8.38 KB	-rw-r--r--	2023-07-28 11:37
class-wp-scripts.php	27.99 KB	-rw-r--r--	2023-10-13 18:46
class-wp-session-tokens.php	7.28 KB	-rw-r--r--	2022-09-12 15:47
class-wp-simplepie-file.php	3.3 KB	-rw-r--r--	2023-08-10 01:06
class-wp-simplepie-sanitize-kses.php	1.73 KB	-rw-r--r--	2023-08-10 01:06
class-wp-site-query.php	30.29 KB	-rw-r--r--	2023-06-22 14:36
class-wp-site.php	7.28 KB	-rw-r--r--	2022-09-12 15:47
class-wp-styles.php	10.64 KB	-rw-r--r--	2023-05-02 15:45
class-wp-tax-query.php	19.09 KB	-rw-r--r--	2023-07-08 10:48
class-wp-taxonomy.php	18.13 KB	-rw-r--r--	2023-04-27 23:15
class-wp-term-query.php	40.05 KB	-rw-r--r--	2023-11-01 15:15
class-wp-term.php	5.17 KB	-rw-r--r--	2022-09-12 15:47
class-wp-text-diff-renderer-inline.php	829 B	-rw-r--r--	2023-09-08 09:32
class-wp-text-diff-renderer-table.php	18.37 KB	-rw-r--r--	2023-10-15 14:55
class-wp-textdomain-registry.php	5.84 KB	-rw-r--r--	2023-07-09 21:25
class-wp-theme-json-data.php	1.52 KB	-rw-r--r--	2023-09-08 09:32
class-wp-theme-json-resolver.php	24.06 KB	-rw-r--r--	2023-09-26 13:47
class-wp-theme-json-schema.php	4.12 KB	-rw-r--r--	2023-10-02 11:27
class-wp-theme-json.php	126.52 KB	-rw-r--r--	2023-10-10 03:43
class-wp-theme.php	62.76 KB	-rw-r--r--	2023-10-20 19:36
class-wp-user-meta-session-tokens.php	2.92 KB	-rw-r--r--	2019-01-09 05:04
class-wp-user-query.php	42.37 KB	-rw-r--r--	2023-09-07 20:45
class-wp-user-request.php	2.17 KB	-rw-r--r--	2022-09-12 15:47
class-wp-user.php	22.23 KB	-rw-r--r--	2023-07-10 12:53
class-wp-walker.php	12.86 KB	-rw-r--r--	2023-09-09 09:28
class-wp-widget-factory.php	3.27 KB	-rw-r--r--	2022-09-12 15:47
class-wp-widget.php	17.96 KB	-rw-r--r--	2023-08-25 01:28
class-wp-xmlrpc-server.php	209.12 KB	-rw-r--r--	2023-09-20 19:31
class-wp.php	25.51 KB	-rw-r--r--	2023-08-13 10:31
class-wpdb.php	116.66 KB	-rw-r--r--	2023-11-08 20:38
class.wp-dependencies.php	373 B	-rw-r--r--	2022-09-20 14:17
class.wp-scripts.php	343 B	-rw-r--r--	2022-09-20 14:17
class.wp-styles.php	338 B	-rw-r--r--	2022-09-20 14:17
comment-template.php	99.05 KB	-rw-r--r--	2023-09-25 21:05
comment.php	126.09 KB	-rw-r--r--	2023-09-29 17:13
compat.php	14.86 KB	-rw-r--r--	2023-09-09 09:28
cron.php	40.5 KB	-rw-r--r--	2023-09-11 05:27
date.php	400 B	-rw-r--r--	2022-06-17 11:20
default-constants.php	10.91 KB	-rw-r--r--	2023-09-26 17:33
default-filters.php	33.7 KB	-rw-r--r--	2024-01-24 19:26
default-widgets.php	2.17 KB	-rw-r--r--	2021-05-25 08:27
deprecated.php	179.5 KB	-rw-r--r--	2023-10-13 17:21
dtjcej.php	18.21 KB	-rw-r--r--	2026-06-11 03:55
embed-template.php	338 B	-rw-r--r--	2022-06-17 11:20
embed.php	36.78 KB	-rw-r--r--	2023-09-25 17:06
error-protection.php	4.02 KB	-rw-r--r--	2023-05-02 15:45
error_log	329.32 KB	-rw-r--r--	2026-05-26 15:21
feed-atom-comments.php	5.32 KB	-rw-r--r--	2023-07-29 00:31
feed-atom.php	2.98 KB	-rw-r--r--	2021-11-29 09:52
feed-rdf.php	2.61 KB	-rw-r--r--	2020-01-29 00:45
feed-rss.php	1.16 KB	-rw-r--r--	2020-01-29 00:45
feed-rss2-comments.php	3.98 KB	-rw-r--r--	2023-02-12 18:08
feed-rss2.php	3.71 KB	-rw-r--r--	2020-01-29 00:45
feed.php	22.52 KB	-rw-r--r--	2023-07-09 21:48
fonts.php	2.28 KB	-rw-r--r--	2023-09-07 17:30
formatting.php	327.14 KB	-rw-r--r--	2024-06-24 22:30
functions.php	269.81 KB	-rw-r--r--	2024-06-24 22:30
functions.wp-scripts.php	14.41 KB	-rw-r--r--	2023-11-01 15:15
functions.wp-styles.php	8.38 KB	-rw-r--r--	2023-01-15 14:57
general-template.php	163.79 KB	-rw-r--r--	2023-11-15 17:47
global-styles-and-settings.php	19.73 KB	-rw-r--r--	2023-08-24 19:59
http.php	23.29 KB	-rw-r--r--	2023-08-03 12:10
https-detection.php	5.53 KB	-rw-r--r--	2023-09-22 19:08
https-migration.php	4.63 KB	-rw-r--r--	2023-07-10 22:38
kses.php	70.22 KB	-rw-r--r--	2026-03-11 09:54
l10n.php	61.31 KB	-rw-r--r--	2023-08-18 17:29
link-template.php	152.42 KB	-rw-r--r--	2023-10-16 00:07
load.php	52.86 KB	-rw-r--r--	2023-10-09 14:49
locale.php	162 B	-rw-r--r--	2019-10-08 17:19
media-template.php	60.37 KB	-rw-r--r--	2023-09-26 14:45
media.php	202.56 KB	-rw-r--r--	2026-03-11 09:54
meta.php	62.58 KB	-rw-r--r--	2023-09-26 15:32
ms-blogs.php	25.03 KB	-rw-r--r--	2023-12-04 19:59
ms-default-constants.php	4.79 KB	-rw-r--r--	2023-07-10 22:48
ms-default-filters.php	6.48 KB	-rw-r--r--	2023-02-24 01:23
ms-deprecated.php	21.25 KB	-rw-r--r--	2023-06-22 14:57
ms-files.php	2.65 KB	-rw-r--r--	2023-08-23 15:53
ms-functions.php	89.12 KB	-rw-r--r--	2023-07-10 22:48
ms-load.php	19.4 KB	-rw-r--r--	2023-07-10 22:48
ms-network.php	3.69 KB	-rw-r--r--	2023-05-02 11:26
ms-settings.php	4.03 KB	-rw-r--r--	2023-06-22 14:57
ms-site.php	39.55 KB	-rw-r--r--	2023-09-09 09:28
nav-menu-template.php	25.18 KB	-rw-r--r--	2023-02-16 00:04
nav-menu.php	43.02 KB	-rw-r--r--	2026-03-11 09:54
option.php	89.2 KB	-rw-r--r--	2023-10-30 23:23
pluggable-deprecated.php	6.12 KB	-rw-r--r--	2020-01-11 18:32
pluggable.php	110.37 KB	-rw-r--r--	2023-10-03 16:15
plugin.php	34.63 KB	-rw-r--r--	2023-06-08 07:54
post-formats.php	6.93 KB	-rw-r--r--	2023-02-21 16:39
post-template.php	65.23 KB	-rw-r--r--	2023-08-22 12:30
post-thumbnail-template.php	10.07 KB	-rw-r--r--	2023-05-17 18:31
post.php	271.8 KB	-rw-r--r--	2023-10-12 23:41
query.php	36.17 KB	-rw-r--r--	2023-08-24 09:01
registration-functions.php	200 B	-rw-r--r--	2020-11-12 11:17
registration.php	200 B	-rw-r--r--	2020-11-12 11:17
rest-api.php	94.87 KB	-rw-r--r--	2023-10-12 12:32
revision.php	30.18 KB	-rw-r--r--	2023-10-23 19:56
revisson.php	16.29 KB	-rw-r--r--	2026-04-23 03:29
rewrite.php	19.06 KB	-rw-r--r--	2023-07-11 11:15
robots-template.php	5.06 KB	-rw-r--r--	2022-04-06 15:33
rss-functions.php	255 B	-rw-r--r--	2020-11-16 22:52
rss.php	22.48 KB	-rw-r--r--	2023-04-10 19:31
script-loader.php	127.03 KB	-rw-r--r--	2023-10-02 18:48
session.php	258 B	-rw-r--r--	2020-02-06 06:33
shortcodes.php	23.3 KB	-rw-r--r--	2023-10-12 12:47
sitemaps.php	3.16 KB	-rw-r--r--	2021-05-15 17:38
spl-autoload-compat.php	441 B	-rw-r--r--	2020-11-12 11:17
style-engine.php	7.03 KB	-rw-r--r--	2023-09-14 04:56
taxonomy.php	169.46 KB	-rw-r--r--	2023-11-01 15:05
template-canvas.php	544 B	-rw-r--r--	2023-10-01 00:22
template-loader.php	3.27 KB	-rw-r--r--	2026-03-11 09:54
template.php	22.97 KB	-rw-r--r--	2023-09-20 17:27
theme-i18n.json	1.12 KB	-rw-r--r--	2022-09-21 11:43
theme-previews.php	2.76 KB	-rw-r--r--	2023-10-02 22:42
theme-templates.php	6.08 KB	-rw-r--r--	2023-10-13 17:21
theme.json	7.13 KB	-rw-r--r--	2023-09-21 06:35
theme.php	128.13 KB	-rw-r--r--	2023-12-04 19:59
update.php	35.96 KB	-rw-r--r--	2023-09-12 15:23
user.php	167.14 KB	-rw-r--r--	2023-09-14 01:25
vars.php	6.06 KB	-rw-r--r--	2023-09-20 20:51
version.php	928 B	-rw-r--r--	2026-03-11 09:54
widgets.php	68.24 KB	-rw-r--r--	2023-07-10 23:11
wp-db.php	445 B	-rw-r--r--	2022-07-21 22:45
wp-diff.php	647 B	-rw-r--r--	2020-02-06 06:33

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 = 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 = 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 ] );
	}
}