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📁 public_html
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/home/ecedu/public_html/wp-includes
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📁 .. Folder -
📁 ID3 Folder -
📁 IXR Folder -
📁 PHPMailer Folder -
📁 Requests Folder -
📁 SimplePie Folder -
📁 Text Folder -
📄 admin-bar.php File 37106
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📁 assets Folder -
📄 atomlib.php File 12078
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📄 author-template.php File 18951
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📁 block-bindings Folder -
📄 block-bindings.php File 5594
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📄 block-editor.php File 28797
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📄 block-i18n.json File 316
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📁 block-patterns Folder -
📄 block-patterns.php File 13213
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📁 block-supports Folder -
📄 block-template-utils.php File 61907
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📄 block-template.php File 15356
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📁 blocks Folder -
📄 blocks.php File 113051
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📄 bookmark-template.php File 12768
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📄 bookmark.php File 15427
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📄 cache-compat.php File 5969
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📄 cache.php File 13474
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📄 canonical.php File 34523
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📄 capabilities.php File 42718
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📄 category-template.php File 57003
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📄 category.php File 12829
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📁 certificates Folder -
📄 class-IXR.php File 2616
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📄 class-avif-info.php File 29615
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📄 class-feed.php File 539
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📄 class-http.php File 367
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📄 class-json.php File 43684
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📄 class-oembed.php File 401
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📄 class-phpass.php File 6771
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📄 class-phpmailer.php File 664
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📄 class-pop3.php File 21121
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📄 class-requests.php File 2237
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📄 class-simplepie.php File 453
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📄 class-smtp.php File 457
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📄 class-snoopy.php File 37715
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📄 class-walker-category-dropdown.php File 2469
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📄 class-walker-category.php File 8477
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📄 class-walker-comment.php File 14221
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📄 class-walker-nav-menu.php File 12044
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📄 class-walker-page-dropdown.php File 2710
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📄 class-walker-page.php File 7612
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📄 class-wp-admin-bar.php File 17874
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📄 class-wp-ajax-response.php File 5266
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📄 class-wp-application-passwords.php File 17099
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📄 class-wp-block-bindings-registry.php File 8463
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📄 class-wp-block-bindings-source.php File 2992
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📄 class-wp-block-editor-context.php File 1350
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📄 class-wp-block-list.php File 4757
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📄 class-wp-block-metadata-registry.php File 11895
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📄 class-wp-block-parser-block.php File 2555
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📄 class-wp-block-parser-frame.php File 2017
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📄 class-wp-block-parser.php File 11532
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📄 class-wp-block-pattern-categories-registry.php File 5371
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📄 class-wp-block-patterns-registry.php File 10783
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📄 class-wp-block-styles-registry.php File 6403
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📄 class-wp-block-supports.php File 5626
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📄 class-wp-block-template.php File 2033
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📄 class-wp-block-templates-registry.php File 7231
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📄 class-wp-block-type-registry.php File 5013
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📄 class-wp-block-type.php File 17265
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📄 class-wp-block.php File 23041
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📄 class-wp-classic-to-block-menu-converter.php File 4088
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📄 class-wp-comment-query.php File 48395
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📄 class-wp-comment.php File 9437
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📄 class-wp-customize-control.php File 25851
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📄 class-wp-customize-manager.php File 202593
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📄 class-wp-customize-nav-menus.php File 57660
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📄 class-wp-customize-panel.php File 10710
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📄 class-wp-customize-section.php File 11209
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📄 class-wp-customize-setting.php File 29962
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📄 class-wp-customize-widgets.php File 72210
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📄 class-wp-date-query.php File 35732
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📄 class-wp-dependencies.php File 15139
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📄 class-wp-dependency.php File 2627
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📄 class-wp-duotone.php File 40783
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📄 class-wp-editor.php File 72335
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📄 class-wp-embed.php File 15931
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📄 class-wp-error.php File 7502
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📄 class-wp-exception.php File 253
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📄 class-wp-fatal-error-handler.php File 8150
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📄 class-wp-feed-cache-transient.php File 3176
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📄 class-wp-feed-cache.php File 969
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📄 class-wp-hook.php File 16000
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📄 class-wp-http-cookie.php File 7389
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📄 class-wp-http-curl.php File 12541
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📄 class-wp-http-encoding.php File 6689
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📄 class-wp-http-ixr-client.php File 3501
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📄 class-wp-http-proxy.php File 5980
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📄 class-wp-http-requests-hooks.php File 2022
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📄 class-wp-http-requests-response.php File 4400
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📄 class-wp-http-response.php File 2977
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📄 class-wp-http-streams.php File 16859
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📄 class-wp-http.php File 41579
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📄 class-wp-image-editor-gd.php File 20162
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📄 class-wp-image-editor-imagick.php File 34735
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📄 class-wp-image-editor.php File 17527
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📄 class-wp-list-util.php File 7443
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📄 class-wp-locale-switcher.php File 6776
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📄 class-wp-locale.php File 16883
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📄 class-wp-matchesmapregex.php File 1828
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📄 class-wp-meta-query.php File 30531
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📄 class-wp-metadata-lazyloader.php File 6833
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📄 class-wp-navigation-fallback.php File 9211
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📄 class-wp-network-query.php File 19857
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📄 class-wp-network.php File 12296
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📄 class-wp-object-cache.php File 17524
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📄 class-wp-oembed-controller.php File 6905
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📄 class-wp-oembed.php File 31606
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📄 class-wp-paused-extensions-storage.php File 5111
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📄 class-wp-phpmailer.php File 3802
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📄 class-wp-plugin-dependencies.php File 25315
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📄 class-wp-post-type.php File 30680
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📄 class-wp-post.php File 6488
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📄 class-wp-query.php File 158023
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📄 class-wp-recovery-mode-cookie-service.php File 6877
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📄 class-wp-recovery-mode-email-service.php File 11183
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📄 class-wp-recovery-mode-key-service.php File 4884
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📄 class-wp-recovery-mode-link-service.php File 3463
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📄 class-wp-recovery-mode.php File 11453
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📄 class-wp-rewrite.php File 63688
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📄 class-wp-role.php File 2523
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📄 class-wp-roles.php File 8586
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📄 class-wp-script-modules.php File 19463
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📄 class-wp-scripts.php File 28344
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📄 class-wp-session-tokens.php File 7319
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📄 class-wp-simplepie-file.php File 3408
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📄 class-wp-simplepie-sanitize-kses.php File 1910
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📄 class-wp-site-query.php File 31625
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📄 class-wp-site.php File 7454
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📄 class-wp-speculation-rules.php File 7527
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📄 class-wp-styles.php File 11010
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📄 class-wp-tax-query.php File 19555
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📄 class-wp-taxonomy.php File 18559
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📄 class-wp-term-query.php File 40869
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📄 class-wp-term.php File 5298
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📄 class-wp-text-diff-renderer-inline.php File 979
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📄 class-wp-text-diff-renderer-table.php File 18880
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📄 class-wp-textdomain-registry.php File 10481
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📄 class-wp-theme-json-data.php File 1809
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📄 class-wp-theme-json-resolver.php File 35738
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📄 class-wp-theme-json-schema.php File 7367
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📄 class-wp-theme-json.php File 163545
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📄 class-wp-theme.php File 65810
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📄 class-wp-token-map.php File 28618
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📄 class-wp-url-pattern-prefixer.php File 4802
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📄 class-wp-user-meta-session-tokens.php File 2990
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📄 class-wp-user-query.php File 43655
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📄 class-wp-user-request.php File 2305
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📄 class-wp-user.php File 22994
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📄 class-wp-walker.php File 13322
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📄 class-wp-widget-factory.php File 3347
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📄 class-wp-widget.php File 18429
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📄 class-wp-xmlrpc-server.php File 215444
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📄 class-wp.php File 26318
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📄 class-wpdb.php File 118284
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📄 class.wp-dependencies.php File 373
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📄 class.wp-scripts.php File 343
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📄 class.wp-styles.php File 338
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📄 comment-template.php File 103104
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📄 comment.php File 131547
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📄 compat.php File 16376
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📄 cron.php File 42658
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📁 css Folder -
📁 customize Folder -
📄 date.php File 400
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📄 default-constants.php File 11365
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📄 default-filters.php File 36697
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📄 default-widgets.php File 2295
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📄 deprecated.php File 191563
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📄 embed-template.php File 338
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📄 embed.php File 38172
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📄 error-protection.php File 4121
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📄 feed-atom-comments.php File 5504
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📄 feed-atom.php File 3121
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📄 feed-rdf.php File 2668
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📄 feed-rss.php File 1189
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📄 feed-rss2-comments.php File 4136
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📄 feed-rss2.php File 3799
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📄 feed.php File 23411
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📁 fonts Folder -
📄 fonts.php File 9751
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📄 formatting.php File 342921
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📄 functions.php File 287546
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📄 functions.wp-scripts.php File 14558
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📄 functions.wp-styles.php File 8583
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📄 general-template.php File 172498
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📄 global-styles-and-settings.php File 21261
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📁 html-api Folder -
📄 http.php File 25312
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📄 https-detection.php File 5857
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📄 https-migration.php File 4741
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📁 images Folder -
📁 interactivity-api Folder -
📁 js Folder -
📄 kses.php File 74472
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📁 l10n Folder -
📄 l10n.php File 68530
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📄 link-template.php File 157801
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📄 load.php File 56440
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📄 locale.php File 162
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📄 media-template.php File 63060
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📄 media.php File 220496
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📄 meta.php File 65243
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📄 ms-blogs.php File 25845
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📄 ms-default-constants.php File 4921
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📄 ms-default-filters.php File 6636
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📄 ms-deprecated.php File 21759
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📄 ms-files.php File 2744
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📄 ms-functions.php File 91582
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📄 ms-load.php File 19883
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📄 ms-network.php File 3782
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📄 ms-settings.php File 4197
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📄 ms-site.php File 41320
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📄 nav-menu-template.php File 25990
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📄 nav-menu.php File 44373
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📄 option.php File 103065
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📁 php-compat Folder -
📄 pluggable-deprecated.php File 6324
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📄 pluggable.php File 122700
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📄 plugin.php File 35465
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📁 pomo Folder -
📄 post-formats.php File 7102
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📄 post-template.php File 68648
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📄 post-thumbnail-template.php File 10879
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📄 post.php File 291712
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📄 query.php File 37035
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📄 registration-functions.php File 200
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📄 registration.php File 200
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📁 rest-api Folder -
📄 rest-api.php File 100257
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📄 revision.php File 30741
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📄 rewrite.php File 19541
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📄 robots-template.php File 5185
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📄 rss-functions.php File 255
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📄 rss.php File 23113
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📄 script-loader.php File 133262
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📄 script-modules.php File 7712
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📄 session.php File 258
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📄 shortcodes.php File 24051
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📁 sitemaps Folder -
📄 sitemaps.php File 3238
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📁 sodium_compat Folder -
📄 speculative-loading.php File 8558
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📄 spl-autoload-compat.php File 441
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📁 style-engine Folder -
📄 style-engine.php File 7563
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📄 taxonomy.php File 176227
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📄 template-canvas.php File 544
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📄 template-loader.php File 3012
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📄 template.php File 24154
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📁 theme-compat Folder -
📄 theme-i18n.json File 1526
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📄 theme-previews.php File 2832
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📄 theme-templates.php File 6238
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📄 theme.json File 8704
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📄 theme.php File 134303
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📄 update.php File 37503
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📄 user.php File 175823
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📄 vars.php File 6562
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📄 version.php File 1090
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📁 widgets Folder -
📄 widgets.php File 70719
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📄 wp-db.php File 445
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📄 wp-diff.php File 799
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View File: ms-blogs.php

<?php

/**
 * Site/blog functions that work with the blogs table and related data.
 *
 * @package WordPress
 * @subpackage Multisite
 * @since MU (3.0.0)
 */

// Don't load directly.
if ( ! defined( 'ABSPATH' ) ) {
	die( '-1' );
}

require_once ABSPATH . WPINC . '/ms-site.php';
require_once ABSPATH . WPINC . '/ms-network.php';

/**
 * Updates the last_updated field for the current site.
 *
 * @since MU (3.0.0)
 */
function wpmu_update_blogs_date() {
	$site_id = get_current_blog_id();

	update_blog_details( $site_id, array( 'last_updated' => current_time( 'mysql', true ) ) );
	/**
	 * Fires after the blog details are updated.
	 *
	 * @since MU (3.0.0)
	 *
	 * @param int $blog_id Site ID.
	 */
	do_action( 'wpmu_blog_updated', $site_id );
}

/**
 * Gets a full site URL, given a site ID.
 *
 * @since MU (3.0.0)
 *
 * @param int $blog_id Site ID.
 * @return string Full site URL if found. Empty string if not.
 */
function get_blogaddress_by_id( $blog_id ) {
	$bloginfo = get_site( (int) $blog_id );

	if ( empty( $bloginfo ) ) {
		return '';
	}

	$scheme = parse_url( $bloginfo->home, PHP_URL_SCHEME );
	$scheme = empty( $scheme ) ? 'http' : $scheme;

	return esc_url( $scheme . '://' . $bloginfo->domain . $bloginfo->path );
}

/**
 * Gets a full site URL, given a site name.
 *
 * @since MU (3.0.0)
 *
 * @param string $blogname Name of the subdomain or directory.
 * @return string
 */
function get_blogaddress_by_name( $blogname ) {
	if ( is_subdomain_install() ) {
		if ( 'main' === $blogname ) {
			$blogname = 'www';
		}
		$url = rtrim( network_home_url(), '/' );
		if ( ! empty( $blogname ) ) {
			$url = preg_replace( '|^([^\.]+://)|', '${1}' . $blogname . '.', $url );
		}
	} else {
		$url = network_home_url( $blogname );
	}
	return esc_url( $url . '/' );
}

/**
 * Retrieves a site's ID given its (subdomain or directory) slug.
 *
 * @since MU (3.0.0)
 * @since 4.7.0 Converted to use `get_sites()`.
 *
 * @param string $slug A site's slug.
 * @return int|null The site ID, or null if no site is found for the given slug.
 */
function get_id_from_blogname( $slug ) {
	$current_network = get_network();
	$slug            = trim( $slug, '/' );

	if ( is_subdomain_install() ) {
		$domain = $slug . '.' . preg_replace( '|^www\.|', '', $current_network->domain );
		$path   = $current_network->path;
	} else {
		$domain = $current_network->domain;
		$path   = $current_network->path . $slug . '/';
	}

	$site_ids = get_sites(
		array(
			'number'                 => 1,
			'fields'                 => 'ids',
			'domain'                 => $domain,
			'path'                   => $path,
			'update_site_meta_cache' => false,
		)
	);

	if ( empty( $site_ids ) ) {
		return null;
	}

	return array_shift( $site_ids );
}

/**
 * Retrieves the details for a blog from the blogs table and blog options.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int|string|array $fields  Optional. A blog ID, a blog slug, or an array of fields to query against.
 *                                  Defaults to the current blog ID.
 * @param bool             $get_all Whether to retrieve all details or only the details in the blogs table.
 *                                  Default is true.
 * @return WP_Site|false Blog details on success. False on failure.
 */
function get_blog_details( $fields = null, $get_all = true ) {
	global $wpdb;

	if ( is_array( $fields ) ) {
		if ( isset( $fields['blog_id'] ) ) {
			$blog_id = $fields['blog_id'];
		} elseif ( isset( $fields['domain'] ) && isset( $fields['path'] ) ) {
			$key  = md5( $fields['domain'] . $fields['path'] );
			$blog = wp_cache_get( $key, 'blog-lookup' );
			if ( false !== $blog ) {
				return $blog;
			}
			if ( str_starts_with( $fields['domain'], 'www.' ) ) {
				$nowww = substr( $fields['domain'], 4 );
				$blog  = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) AND path = %s ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'], $fields['path'] ) );
			} else {
				$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s AND path = %s", $fields['domain'], $fields['path'] ) );
			}
			if ( $blog ) {
				wp_cache_set( $blog->blog_id . 'short', $blog, 'blog-details' );
				$blog_id = $blog->blog_id;
			} else {
				return false;
			}
		} elseif ( isset( $fields['domain'] ) && is_subdomain_install() ) {
			$key  = md5( $fields['domain'] );
			$blog = wp_cache_get( $key, 'blog-lookup' );
			if ( false !== $blog ) {
				return $blog;
			}
			if ( str_starts_with( $fields['domain'], 'www.' ) ) {
				$nowww = substr( $fields['domain'], 4 );
				$blog  = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain IN (%s,%s) ORDER BY CHAR_LENGTH(domain) DESC", $nowww, $fields['domain'] ) );
			} else {
				$blog = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s", $fields['domain'] ) );
			}
			if ( $blog ) {
				wp_cache_set( $blog->blog_id . 'short', $blog, 'blog-details' );
				$blog_id = $blog->blog_id;
			} else {
				return false;
			}
		} else {
			return false;
		}
	} else {
		if ( ! $fields ) {
			$blog_id = get_current_blog_id();
		} elseif ( ! is_numeric( $fields ) ) {
			$blog_id = get_id_from_blogname( $fields );
		} else {
			$blog_id = $fields;
		}
	}

	$blog_id = (int) $blog_id;

	$all     = $get_all ? '' : 'short';
	$details = wp_cache_get( $blog_id . $all, 'blog-details' );

	if ( $details ) {
		if ( ! is_object( $details ) ) {
			if ( -1 === $details ) {
				return false;
			} else {
				// Clear old pre-serialized objects. Cache clients do better with that.
				wp_cache_delete( $blog_id . $all, 'blog-details' );
				unset( $details );
			}
		} else {
			return $details;
		}
	}

	// Try the other cache.
	if ( $get_all ) {
		$details = wp_cache_get( $blog_id . 'short', 'blog-details' );
	} else {
		$details = wp_cache_get( $blog_id, 'blog-details' );
		// If short was requested and full cache is set, we can return.
		if ( $details ) {
			if ( ! is_object( $details ) ) {
				if ( -1 === $details ) {
					return false;
				} else {
					// Clear old pre-serialized objects. Cache clients do better with that.
					wp_cache_delete( $blog_id, 'blog-details' );
					unset( $details );
				}
			} else {
				return $details;
			}
		}
	}

	if ( empty( $details ) ) {
		$details = WP_Site::get_instance( $blog_id );
		if ( ! $details ) {
			// Set the full cache.
			wp_cache_set( $blog_id, -1, 'blog-details' );
			return false;
		}
	}

	if ( ! $details instanceof WP_Site ) {
		$details = new WP_Site( $details );
	}

	if ( ! $get_all ) {
		wp_cache_set( $blog_id . $all, $details, 'blog-details' );
		return $details;
	}

	$switched_blog = false;

	if ( get_current_blog_id() !== $blog_id ) {
		switch_to_blog( $blog_id );
		$switched_blog = true;
	}

	$details->blogname   = get_option( 'blogname' );
	$details->siteurl    = get_option( 'siteurl' );
	$details->post_count = get_option( 'post_count' );
	$details->home       = get_option( 'home' );

	if ( $switched_blog ) {
		restore_current_blog();
	}

	/**
	 * Filters a blog's details.
	 *
	 * @since MU (3.0.0)
	 * @deprecated 4.7.0 Use {@see 'site_details'} instead.
	 *
	 * @param WP_Site $details The blog details.
	 */
	$details = apply_filters_deprecated( 'blog_details', array( $details ), '4.7.0', 'site_details' );

	wp_cache_set( $blog_id . $all, $details, 'blog-details' );

	$key = md5( $details->domain . $details->path );
	wp_cache_set( $key, $details, 'blog-lookup' );

	return $details;
}

/**
 * Clears the blog details cache.
 *
 * @since MU (3.0.0)
 *
 * @param int $blog_id Optional. Blog ID. Defaults to current blog.
 */
function refresh_blog_details( $blog_id = 0 ) {
	$blog_id = (int) $blog_id;
	if ( ! $blog_id ) {
		$blog_id = get_current_blog_id();
	}

	clean_blog_cache( $blog_id );
}

/**
 * Updates the details for a blog and the blogs table for a given blog ID.
 *
 * @since MU (3.0.0)
 *
 * @param int   $blog_id Blog ID.
 * @param array $details Array of details keyed by blogs table field names.
 * @return bool True if update succeeds, false otherwise.
 */
function update_blog_details( $blog_id, $details = array() ) {
	if ( empty( $details ) ) {
		return false;
	}

	if ( is_object( $details ) ) {
		$details = get_object_vars( $details );
	}

	$site = wp_update_site( $blog_id, $details );

	if ( is_wp_error( $site ) ) {
		return false;
	}

	return true;
}

/**
 * Cleans the site details cache for a site.
 *
 * @since 4.7.4
 *
 * @param int $site_id Optional. Site ID. Default is the current site ID.
 */
function clean_site_details_cache( $site_id = 0 ) {
	$site_id = (int) $site_id;
	if ( ! $site_id ) {
		$site_id = get_current_blog_id();
	}

	wp_cache_delete( $site_id, 'site-details' );
	wp_cache_delete( $site_id, 'blog-details' );
}

/**
 * Retrieves option value for a given blog id based on name of option.
 *
 * If the option does not exist or does not have a value, then the return value
 * will be false. This is useful to check whether you need to install an option
 * and is commonly used during installation of plugin options and to test
 * whether upgrading is required.
 *
 * If the option was serialized then it will be unserialized when it is returned.
 *
 * @since MU (3.0.0)
 *
 * @param int    $id            A blog ID. Can be null to refer to the current blog.
 * @param string $option        Name of option to retrieve. Expected to not be SQL-escaped.
 * @param mixed  $default_value Optional. Default value to return if the option does not exist.
 * @return mixed Value set for the option.
 */
function get_blog_option( $id, $option, $default_value = false ) {
	$id = (int) $id;

	if ( empty( $id ) ) {
		$id = get_current_blog_id();
	}

	if ( get_current_blog_id() === $id ) {
		return get_option( $option, $default_value );
	}

	switch_to_blog( $id );
	$value = get_option( $option, $default_value );
	restore_current_blog();

	/**
	 * Filters a blog option value.
	 *
	 * The dynamic portion of the hook name, `$option`, refers to the blog option name.
	 *
	 * @since 3.5.0
	 *
	 * @param string  $value The option value.
	 * @param int     $id    Blog ID.
	 */
	return apply_filters( "blog_option_{$option}", $value, $id );
}

/**
 * Adds a new option for a given blog ID.
 *
 * You do not need to serialize values. If the value needs to be serialized, then
 * it will be serialized before it is inserted into the database. Remember,
 * resources can not be serialized or added as an option.
 *
 * You can create options without values and then update the values later.
 * Existing options will not be updated and checks are performed to ensure that you
 * aren't adding a protected WordPress option. Care should be taken to not name
 * options the same as the ones which are protected.
 *
 * @since MU (3.0.0)
 *
 * @param int    $id     A blog ID. Can be null to refer to the current blog.
 * @param string $option Name of option to add. Expected to not be SQL-escaped.
 * @param mixed  $value  Option value, can be anything. Expected to not be SQL-escaped.
 * @return bool True if the option was added, false otherwise.
 */
function add_blog_option( $id, $option, $value ) {
	$id = (int) $id;

	if ( empty( $id ) ) {
		$id = get_current_blog_id();
	}

	if ( get_current_blog_id() === $id ) {
		return add_option( $option, $value );
	}

	switch_to_blog( $id );
	$return = add_option( $option, $value );
	restore_current_blog();

	return $return;
}

/**
 * Removes an option by name for a given blog ID. Prevents removal of protected WordPress options.
 *
 * @since MU (3.0.0)
 *
 * @param int    $id     A blog ID. Can be null to refer to the current blog.
 * @param string $option Name of option to remove. Expected to not be SQL-escaped.
 * @return bool True if the option was deleted, false otherwise.
 */
function delete_blog_option( $id, $option ) {
	$id = (int) $id;

	if ( empty( $id ) ) {
		$id = get_current_blog_id();
	}

	if ( get_current_blog_id() === $id ) {
		return delete_option( $option );
	}

	switch_to_blog( $id );
	$return = delete_option( $option );
	restore_current_blog();

	return $return;
}

/**
 * Updates an option for a particular blog.
 *
 * @since MU (3.0.0)
 *
 * @param int    $id         The blog ID.
 * @param string $option     The option key.
 * @param mixed  $value      The option value.
 * @param mixed  $deprecated Not used.
 * @return bool True if the value was updated, false otherwise.
 */
function update_blog_option( $id, $option, $value, $deprecated = null ) {
	$id = (int) $id;

	if ( null !== $deprecated ) {
		_deprecated_argument( __FUNCTION__, '3.1.0' );
	}

	if ( get_current_blog_id() === $id ) {
		return update_option( $option, $value );
	}

	switch_to_blog( $id );
	$return = update_option( $option, $value );
	restore_current_blog();

	return $return;
}

/**
 * Switches the current blog.
 *
 * This function is useful if you need to pull posts, or other information,
 * from other blogs. You can switch back afterwards using restore_current_blog().
 *
 * PHP code loaded with the originally requested site, such as code from a plugin or theme, does not switch. See #14941.
 *
 * @see restore_current_blog()
 * @since MU (3.0.0)
 *
 * @global wpdb            $wpdb               WordPress database abstraction object.
 * @global int             $blog_id
 * @global array           $_wp_switched_stack
 * @global bool            $switched
 * @global string          $table_prefix       The database table prefix.
 * @global WP_Object_Cache $wp_object_cache
 *
 * @param int  $new_blog_id The ID of the blog to switch to. Default: current blog.
 * @param bool $deprecated  Not used.
 * @return true Always returns true.
 */
function switch_to_blog( $new_blog_id, $deprecated = null ) {
	global $wpdb;

	$prev_blog_id = get_current_blog_id();
	if ( empty( $new_blog_id ) ) {
		$new_blog_id = $prev_blog_id;
	}

	$GLOBALS['_wp_switched_stack'][] = $prev_blog_id;

	/*
	 * If we're switching to the same blog id that we're on,
	 * set the right vars, do the associated actions, but skip
	 * the extra unnecessary work
	 */
	if ( $new_blog_id === $prev_blog_id ) {
		/**
		 * Fires when the blog is switched.
		 *
		 * @since MU (3.0.0)
		 * @since 5.4.0 The `$context` parameter was added.
		 *
		 * @param int    $new_blog_id  New blog ID.
		 * @param int    $prev_blog_id Previous blog ID.
		 * @param string $context      Additional context. Accepts 'switch' when called from switch_to_blog()
		 *                             or 'restore' when called from restore_current_blog().
		 */
		do_action( 'switch_blog', $new_blog_id, $prev_blog_id, 'switch' );

		$GLOBALS['switched'] = true;

		return true;
	}

	$wpdb->set_blog_id( $new_blog_id );
	$GLOBALS['table_prefix'] = $wpdb->get_blog_prefix();
	$GLOBALS['blog_id']      = $new_blog_id;

	if ( function_exists( 'wp_cache_switch_to_blog' ) ) {
		wp_cache_switch_to_blog( $new_blog_id );
	} else {
		global $wp_object_cache;

		if ( is_object( $wp_object_cache ) && isset( $wp_object_cache->global_groups ) ) {
			$global_groups = $wp_object_cache->global_groups;
		} else {
			$global_groups = false;
		}

		wp_cache_init();

		if ( function_exists( 'wp_cache_add_global_groups' ) ) {
			if ( is_array( $global_groups ) ) {
				wp_cache_add_global_groups( $global_groups );
			} else {
				wp_cache_add_global_groups(
					array(
						'blog-details',
						'blog-id-cache',
						'blog-lookup',
						'blog_meta',
						'global-posts',
						'image_editor',
						'networks',
						'network-queries',
						'sites',
						'site-details',
						'site-options',
						'site-queries',
						'site-transient',
						'theme_files',
						'rss',
						'users',
						'user-queries',
						'user_meta',
						'useremail',
						'userlogins',
						'userslugs',
					)
				);
			}

			wp_cache_add_non_persistent_groups( array( 'counts', 'plugins', 'theme_json' ) );
		}
	}

	/** This filter is documented in wp-includes/ms-blogs.php */
	do_action( 'switch_blog', $new_blog_id, $prev_blog_id, 'switch' );

	$GLOBALS['switched'] = true;

	return true;
}

/**
 * Restores the current blog, after calling switch_to_blog().
 *
 * @see switch_to_blog()
 * @since MU (3.0.0)
 *
 * @global wpdb            $wpdb               WordPress database abstraction object.
 * @global array           $_wp_switched_stack
 * @global int             $blog_id
 * @global bool            $switched
 * @global string          $table_prefix       The database table prefix.
 * @global WP_Object_Cache $wp_object_cache
 *
 * @return bool True on success, false if we're already on the current blog.
 */
function restore_current_blog() {
	global $wpdb;

	if ( empty( $GLOBALS['_wp_switched_stack'] ) ) {
		return false;
	}

	$new_blog_id  = array_pop( $GLOBALS['_wp_switched_stack'] );
	$prev_blog_id = get_current_blog_id();

	if ( $new_blog_id === $prev_blog_id ) {
		/** This filter is documented in wp-includes/ms-blogs.php */
		do_action( 'switch_blog', $new_blog_id, $prev_blog_id, 'restore' );

		// If we still have items in the switched stack, consider ourselves still 'switched'.
		$GLOBALS['switched'] = ! empty( $GLOBALS['_wp_switched_stack'] );

		return true;
	}

	$wpdb->set_blog_id( $new_blog_id );
	$GLOBALS['blog_id']      = $new_blog_id;
	$GLOBALS['table_prefix'] = $wpdb->get_blog_prefix();

	if ( function_exists( 'wp_cache_switch_to_blog' ) ) {
		wp_cache_switch_to_blog( $new_blog_id );
	} else {
		global $wp_object_cache;

		if ( is_object( $wp_object_cache ) && isset( $wp_object_cache->global_groups ) ) {
			$global_groups = $wp_object_cache->global_groups;
		} else {
			$global_groups = false;
		}

		wp_cache_init();

		if ( function_exists( 'wp_cache_add_global_groups' ) ) {
			if ( is_array( $global_groups ) ) {
				wp_cache_add_global_groups( $global_groups );
			} else {
				wp_cache_add_global_groups(
					array(
						'blog-details',
						'blog-id-cache',
						'blog-lookup',
						'blog_meta',
						'global-posts',
						'image_editor',
						'networks',
						'network-queries',
						'sites',
						'site-details',
						'site-options',
						'site-queries',
						'site-transient',
						'theme_files',
						'rss',
						'users',
						'user-queries',
						'user_meta',
						'useremail',
						'userlogins',
						'userslugs',
					)
				);
			}

			wp_cache_add_non_persistent_groups( array( 'counts', 'plugins', 'theme_json' ) );
		}
	}

	/** This filter is documented in wp-includes/ms-blogs.php */
	do_action( 'switch_blog', $new_blog_id, $prev_blog_id, 'restore' );

	// If we still have items in the switched stack, consider ourselves still 'switched'.
	$GLOBALS['switched'] = ! empty( $GLOBALS['_wp_switched_stack'] );

	return true;
}

/**
 * Switches the initialized roles and current user capabilities to another site.
 *
 * @since 4.9.0
 *
 * @param int $new_site_id New site ID.
 * @param int $old_site_id Old site ID.
 */
function wp_switch_roles_and_user( $new_site_id, $old_site_id ) {
	if ( $new_site_id === $old_site_id ) {
		return;
	}

	if ( ! did_action( 'init' ) ) {
		return;
	}

	wp_roles()->for_site( $new_site_id );
	wp_get_current_user()->for_site( $new_site_id );
}

/**
 * Determines if switch_to_blog() is in effect.
 *
 * @since 3.5.0
 *
 * @global array $_wp_switched_stack
 *
 * @return bool True if switched, false otherwise.
 */
function ms_is_switched() {
	return ! empty( $GLOBALS['_wp_switched_stack'] );
}

/**
 * Checks if a particular blog is archived.
 *
 * @since MU (3.0.0)
 *
 * @param int $id Blog ID.
 * @return string Whether the blog is archived or not.
 */
function is_archived( $id ) {
	return get_blog_status( $id, 'archived' );
}

/**
 * Updates the 'archived' status of a particular blog.
 *
 * @since MU (3.0.0)
 *
 * @param int    $id       Blog ID.
 * @param string $archived The new status.
 * @return string $archived
 */
function update_archived( $id, $archived ) {
	update_blog_status( $id, 'archived', $archived );
	return $archived;
}

/**
 * Updates a blog details field.
 *
 * @since MU (3.0.0)
 * @since 5.1.0 Use wp_update_site() internally.
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int    $blog_id    Blog ID.
 * @param string $pref       Field name.
 * @param string $value      Field value.
 * @param null   $deprecated Not used.
 * @return string|false $value
 */
function update_blog_status( $blog_id, $pref, $value, $deprecated = null ) {
	global $wpdb;

	if ( null !== $deprecated ) {
		_deprecated_argument( __FUNCTION__, '3.1.0' );
	}

	$allowed_field_names = array( 'site_id', 'domain', 'path', 'registered', 'last_updated', 'public', 'archived', 'mature', 'spam', 'deleted', 'lang_id' );

	if ( ! in_array( $pref, $allowed_field_names, true ) ) {
		return $value;
	}

	$result = wp_update_site(
		$blog_id,
		array(
			$pref => $value,
		)
	);

	if ( is_wp_error( $result ) ) {
		return false;
	}

	return $value;
}

/**
 * Gets a blog details field.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param int    $id   Blog ID.
 * @param string $pref Field name.
 * @return bool|string|null $value
 */
function get_blog_status( $id, $pref ) {
	global $wpdb;

	$details = get_site( $id );
	if ( $details ) {
		return $details->$pref;
	}

	return $wpdb->get_var( $wpdb->prepare( "SELECT %s FROM {$wpdb->blogs} WHERE blog_id = %d", $pref, $id ) );
}

/**
 * Gets a list of most recently updated blogs.
 *
 * @since MU (3.0.0)
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @param mixed $deprecated Not used.
 * @param int   $start      Optional. Number of blogs to offset the query. Used to build LIMIT clause.
 *                          Can be used for pagination. Default 0.
 * @param int   $quantity   Optional. The maximum number of blogs to retrieve. Default 40.
 * @return array The list of blogs.
 */
function get_last_updated( $deprecated = '', $start = 0, $quantity = 40 ) {
	global $wpdb;

	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, 'MU' ); // Never used.
	}

	return $wpdb->get_results( $wpdb->prepare( "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' AND last_updated != '0000-00-00 00:00:00' ORDER BY last_updated DESC limit %d, %d", get_current_network_id(), $start, $quantity ), ARRAY_A );
}

/**
 * Handler for updating the site's last updated date when a post is published or
 * an already published post is changed.
 *
 * @since 3.3.0
 *
 * @param string  $new_status The new post status.
 * @param string  $old_status The old post status.
 * @param WP_Post $post       Post object.
 */
function _update_blog_date_on_post_publish( $new_status, $old_status, $post ) {
	$post_type_obj = get_post_type_object( $post->post_type );
	if ( ! $post_type_obj || ! $post_type_obj->public ) {
		return;
	}

	if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
		return;
	}

	// Post was freshly published, published post was saved, or published post was unpublished.

	wpmu_update_blogs_date();
}

/**
 * Handler for updating the current site's last updated date when a published
 * post is deleted.
 *
 * @since 3.4.0
 *
 * @param int $post_id Post ID
 */
function _update_blog_date_on_post_delete( $post_id ) {
	$post = get_post( $post_id );

	$post_type_obj = get_post_type_object( $post->post_type );
	if ( ! $post_type_obj || ! $post_type_obj->public ) {
		return;
	}

	if ( 'publish' !== $post->post_status ) {
		return;
	}

	wpmu_update_blogs_date();
}

/**
 * Handler for updating the current site's posts count when a post is deleted.
 *
 * @since 4.0.0
 * @since 6.2.0 Added the `$post` parameter.
 *
 * @param int     $post_id Post ID.
 * @param WP_Post $post    Post object.
 */
function _update_posts_count_on_delete( $post_id, $post ) {
	if ( ! $post || 'publish' !== $post->post_status || 'post' !== $post->post_type ) {
		return;
	}

	update_posts_count();
}

/**
 * Handler for updating the current site's posts count when a post status changes.
 *
 * @since 4.0.0
 * @since 4.9.0 Added the `$post` parameter.
 *
 * @param string  $new_status The status the post is changing to.
 * @param string  $old_status The status the post is changing from.
 * @param WP_Post $post       Post object
 */
function _update_posts_count_on_transition_post_status( $new_status, $old_status, $post = null ) {
	if ( $new_status === $old_status ) {
		return;
	}

	if ( 'post' !== get_post_type( $post ) ) {
		return;
	}

	if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
		return;
	}

	update_posts_count();
}

/**
 * Counts number of sites grouped by site status.
 *
 * @since 5.3.0
 *
 * @param int $network_id Optional. The network to get counts for. Default is the current network ID.
 * @return int[] {
 *     Numbers of sites grouped by site status.
 *
 *     @type int $all      The total number of sites.
 *     @type int $public   The number of public sites.
 *     @type int $archived The number of archived sites.
 *     @type int $mature   The number of mature sites.
 *     @type int $spam     The number of spam sites.
 *     @type int $deleted  The number of deleted sites.
 * }
 */
function wp_count_sites( $network_id = null ) {
	if ( empty( $network_id ) ) {
		$network_id = get_current_network_id();
	}

	$counts = array();
	$args   = array(
		'network_id'    => $network_id,
		'number'        => 1,
		'fields'        => 'ids',
		'no_found_rows' => false,
	);

	$q             = new WP_Site_Query( $args );
	$counts['all'] = $q->found_sites;

	$_args    = $args;
	$statuses = array( 'public', 'archived', 'mature', 'spam', 'deleted' );

	foreach ( $statuses as $status ) {
		$_args            = $args;
		$_args[ $status ] = 1;

		$q                 = new WP_Site_Query( $_args );
		$counts[ $status ] = $q->found_sites;
	}

	return $counts;
}