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/wp-admin/includes/update-core.php

https://gitlab.com/itlboy/susoft-dev-thammyvien
PHP | 1260 lines | 955 code | 76 blank | 229 comment | 101 complexity | d339ec60016fc081497d2cd7a108514d MD5 | raw file

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   1<?php
   2/**
   3 * WordPress core upgrade functionality.
   4 *
   5 * @package WordPress
   6 * @subpackage Administration
   7 * @since 2.7.0
   8 */
   9
  10/**
  11 * Stores files to be deleted.
  12 *
  13 * @since 2.7.0
  14 * @global array $_old_files
  15 * @var array
  16 * @name $_old_files
  17 */
  18global $_old_files;
  19
  20$_old_files = array(
  21// 2.0
  22'wp-admin/import-b2.php',
  23'wp-admin/import-blogger.php',
  24'wp-admin/import-greymatter.php',
  25'wp-admin/import-livejournal.php',
  26'wp-admin/import-mt.php',
  27'wp-admin/import-rss.php',
  28'wp-admin/import-textpattern.php',
  29'wp-admin/quicktags.js',
  30'wp-images/fade-butt.png',
  31'wp-images/get-firefox.png',
  32'wp-images/header-shadow.png',
  33'wp-images/smilies',
  34'wp-images/wp-small.png',
  35'wp-images/wpminilogo.png',
  36'wp.php',
  37// 2.0.8
  38'wp-includes/js/tinymce/plugins/inlinepopups/readme.txt',
  39// 2.1
  40'wp-admin/edit-form-ajax-cat.php',
  41'wp-admin/execute-pings.php',
  42'wp-admin/inline-uploading.php',
  43'wp-admin/link-categories.php',
  44'wp-admin/list-manipulation.js',
  45'wp-admin/list-manipulation.php',
  46'wp-includes/comment-functions.php',
  47'wp-includes/feed-functions.php',
  48'wp-includes/functions-compat.php',
  49'wp-includes/functions-formatting.php',
  50'wp-includes/functions-post.php',
  51'wp-includes/js/dbx-key.js',
  52'wp-includes/js/tinymce/plugins/autosave/langs/cs.js',
  53'wp-includes/js/tinymce/plugins/autosave/langs/sv.js',
  54'wp-includes/links.php',
  55'wp-includes/pluggable-functions.php',
  56'wp-includes/template-functions-author.php',
  57'wp-includes/template-functions-category.php',
  58'wp-includes/template-functions-general.php',
  59'wp-includes/template-functions-links.php',
  60'wp-includes/template-functions-post.php',
  61'wp-includes/wp-l10n.php',
  62// 2.2
  63'wp-admin/cat-js.php',
  64'wp-admin/import/b2.php',
  65'wp-includes/js/autosave-js.php',
  66'wp-includes/js/list-manipulation-js.php',
  67'wp-includes/js/wp-ajax-js.php',
  68// 2.3
  69'wp-admin/admin-db.php',
  70'wp-admin/cat.js',
  71'wp-admin/categories.js',
  72'wp-admin/custom-fields.js',
  73'wp-admin/dbx-admin-key.js',
  74'wp-admin/edit-comments.js',
  75'wp-admin/install-rtl.css',
  76'wp-admin/install.css',
  77'wp-admin/upgrade-schema.php',
  78'wp-admin/upload-functions.php',
  79'wp-admin/upload-rtl.css',
  80'wp-admin/upload.css',
  81'wp-admin/upload.js',
  82'wp-admin/users.js',
  83'wp-admin/widgets-rtl.css',
  84'wp-admin/widgets.css',
  85'wp-admin/xfn.js',
  86'wp-includes/js/tinymce/license.html',
  87// 2.5
  88'wp-admin/css/upload.css',
  89'wp-admin/images/box-bg-left.gif',
  90'wp-admin/images/box-bg-right.gif',
  91'wp-admin/images/box-bg.gif',
  92'wp-admin/images/box-butt-left.gif',
  93'wp-admin/images/box-butt-right.gif',
  94'wp-admin/images/box-butt.gif',
  95'wp-admin/images/box-head-left.gif',
  96'wp-admin/images/box-head-right.gif',
  97'wp-admin/images/box-head.gif',
  98'wp-admin/images/heading-bg.gif',
  99'wp-admin/images/login-bkg-bottom.gif',
 100'wp-admin/images/login-bkg-tile.gif',
 101'wp-admin/images/notice.gif',
 102'wp-admin/images/toggle.gif',
 103'wp-admin/includes/upload.php',
 104'wp-admin/js/dbx-admin-key.js',
 105'wp-admin/js/link-cat.js',
 106'wp-admin/profile-update.php',
 107'wp-admin/templates.php',
 108'wp-includes/images/wlw/WpComments.png',
 109'wp-includes/images/wlw/WpIcon.png',
 110'wp-includes/images/wlw/WpWatermark.png',
 111'wp-includes/js/dbx.js',
 112'wp-includes/js/fat.js',
 113'wp-includes/js/list-manipulation.js',
 114'wp-includes/js/tinymce/langs/en.js',
 115'wp-includes/js/tinymce/plugins/autosave/editor_plugin_src.js',
 116'wp-includes/js/tinymce/plugins/autosave/langs',
 117'wp-includes/js/tinymce/plugins/directionality/images',
 118'wp-includes/js/tinymce/plugins/directionality/langs',
 119'wp-includes/js/tinymce/plugins/inlinepopups/css',
 120'wp-includes/js/tinymce/plugins/inlinepopups/images',
 121'wp-includes/js/tinymce/plugins/inlinepopups/jscripts',
 122'wp-includes/js/tinymce/plugins/paste/images',
 123'wp-includes/js/tinymce/plugins/paste/jscripts',
 124'wp-includes/js/tinymce/plugins/paste/langs',
 125'wp-includes/js/tinymce/plugins/spellchecker/classes/HttpClient.class.php',
 126'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyGoogleSpell.class.php',
 127'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyPspell.class.php',
 128'wp-includes/js/tinymce/plugins/spellchecker/classes/TinyPspellShell.class.php',
 129'wp-includes/js/tinymce/plugins/spellchecker/css/spellchecker.css',
 130'wp-includes/js/tinymce/plugins/spellchecker/images',
 131'wp-includes/js/tinymce/plugins/spellchecker/langs',
 132'wp-includes/js/tinymce/plugins/spellchecker/tinyspell.php',
 133'wp-includes/js/tinymce/plugins/wordpress/images',
 134'wp-includes/js/tinymce/plugins/wordpress/langs',
 135'wp-includes/js/tinymce/plugins/wordpress/wordpress.css',
 136'wp-includes/js/tinymce/plugins/wphelp',
 137'wp-includes/js/tinymce/themes/advanced/css',
 138'wp-includes/js/tinymce/themes/advanced/images',
 139'wp-includes/js/tinymce/themes/advanced/jscripts',
 140'wp-includes/js/tinymce/themes/advanced/langs',
 141// 2.5.1
 142'wp-includes/js/tinymce/tiny_mce_gzip.php',
 143// 2.6
 144'wp-admin/bookmarklet.php',
 145'wp-includes/js/jquery/jquery.dimensions.min.js',
 146'wp-includes/js/tinymce/plugins/wordpress/popups.css',
 147'wp-includes/js/wp-ajax.js',
 148// 2.7
 149'wp-admin/css/press-this-ie-rtl.css',
 150'wp-admin/css/press-this-ie.css',
 151'wp-admin/css/upload-rtl.css',
 152'wp-admin/edit-form.php',
 153'wp-admin/images/comment-pill.gif',
 154'wp-admin/images/comment-stalk-classic.gif',
 155'wp-admin/images/comment-stalk-fresh.gif',
 156'wp-admin/images/comment-stalk-rtl.gif',
 157'wp-admin/images/del.png',
 158'wp-admin/images/gear.png',
 159'wp-admin/images/media-button-gallery.gif',
 160'wp-admin/images/media-buttons.gif',
 161'wp-admin/images/postbox-bg.gif',
 162'wp-admin/images/tab.png',
 163'wp-admin/images/tail.gif',
 164'wp-admin/js/forms.js',
 165'wp-admin/js/upload.js',
 166'wp-admin/link-import.php',
 167'wp-includes/images/audio.png',
 168'wp-includes/images/css.png',
 169'wp-includes/images/default.png',
 170'wp-includes/images/doc.png',
 171'wp-includes/images/exe.png',
 172'wp-includes/images/html.png',
 173'wp-includes/images/js.png',
 174'wp-includes/images/pdf.png',
 175'wp-includes/images/swf.png',
 176'wp-includes/images/tar.png',
 177'wp-includes/images/text.png',
 178'wp-includes/images/video.png',
 179'wp-includes/images/zip.png',
 180'wp-includes/js/tinymce/tiny_mce_config.php',
 181'wp-includes/js/tinymce/tiny_mce_ext.js',
 182// 2.8
 183'wp-admin/js/users.js',
 184'wp-includes/js/swfupload/plugins/swfupload.documentready.js',
 185'wp-includes/js/swfupload/plugins/swfupload.graceful_degradation.js',
 186'wp-includes/js/swfupload/swfupload_f9.swf',
 187'wp-includes/js/tinymce/plugins/autosave',
 188'wp-includes/js/tinymce/plugins/paste/css',
 189'wp-includes/js/tinymce/utils/mclayer.js',
 190'wp-includes/js/tinymce/wordpress.css',
 191// 2.8.5
 192'wp-admin/import/btt.php',
 193'wp-admin/import/jkw.php',
 194// 2.9
 195'wp-admin/js/page.dev.js',
 196'wp-admin/js/page.js',
 197'wp-admin/js/set-post-thumbnail-handler.dev.js',
 198'wp-admin/js/set-post-thumbnail-handler.js',
 199'wp-admin/js/slug.dev.js',
 200'wp-admin/js/slug.js',
 201'wp-includes/gettext.php',
 202'wp-includes/js/tinymce/plugins/wordpress/js',
 203'wp-includes/streams.php',
 204// MU
 205'README.txt',
 206'htaccess.dist',
 207'index-install.php',
 208'wp-admin/css/mu-rtl.css',
 209'wp-admin/css/mu.css',
 210'wp-admin/images/site-admin.png',
 211'wp-admin/includes/mu.php',
 212'wp-admin/wpmu-admin.php',
 213'wp-admin/wpmu-blogs.php',
 214'wp-admin/wpmu-edit.php',
 215'wp-admin/wpmu-options.php',
 216'wp-admin/wpmu-themes.php',
 217'wp-admin/wpmu-upgrade-site.php',
 218'wp-admin/wpmu-users.php',
 219'wp-includes/images/wordpress-mu.png',
 220'wp-includes/wpmu-default-filters.php',
 221'wp-includes/wpmu-functions.php',
 222'wpmu-settings.php',
 223// 3.0
 224'wp-admin/categories.php',
 225'wp-admin/edit-category-form.php',
 226'wp-admin/edit-page-form.php',
 227'wp-admin/edit-pages.php',
 228'wp-admin/images/admin-header-footer.png',
 229'wp-admin/images/browse-happy.gif',
 230'wp-admin/images/ico-add.png',
 231'wp-admin/images/ico-close.png',
 232'wp-admin/images/ico-edit.png',
 233'wp-admin/images/ico-viewpage.png',
 234'wp-admin/images/fav-top.png',
 235'wp-admin/images/screen-options-left.gif',
 236'wp-admin/images/wp-logo-vs.gif',
 237'wp-admin/images/wp-logo.gif',
 238'wp-admin/import',
 239'wp-admin/js/wp-gears.dev.js',
 240'wp-admin/js/wp-gears.js',
 241'wp-admin/options-misc.php',
 242'wp-admin/page-new.php',
 243'wp-admin/page.php',
 244'wp-admin/rtl.css',
 245'wp-admin/rtl.dev.css',
 246'wp-admin/update-links.php',
 247'wp-admin/wp-admin.css',
 248'wp-admin/wp-admin.dev.css',
 249'wp-includes/js/codepress',
 250'wp-includes/js/codepress/engines/khtml.js',
 251'wp-includes/js/codepress/engines/older.js',
 252'wp-includes/js/jquery/autocomplete.dev.js',
 253'wp-includes/js/jquery/autocomplete.js',
 254'wp-includes/js/jquery/interface.js',
 255'wp-includes/js/scriptaculous/prototype.js',
 256'wp-includes/js/tinymce/wp-tinymce.js',
 257// 3.1
 258'wp-admin/edit-attachment-rows.php',
 259'wp-admin/edit-link-categories.php',
 260'wp-admin/edit-link-category-form.php',
 261'wp-admin/edit-post-rows.php',
 262'wp-admin/images/button-grad-active-vs.png',
 263'wp-admin/images/button-grad-vs.png',
 264'wp-admin/images/fav-arrow-vs-rtl.gif',
 265'wp-admin/images/fav-arrow-vs.gif',
 266'wp-admin/images/fav-top-vs.gif',
 267'wp-admin/images/list-vs.png',
 268'wp-admin/images/screen-options-right-up.gif',
 269'wp-admin/images/screen-options-right.gif',
 270'wp-admin/images/visit-site-button-grad-vs.gif',
 271'wp-admin/images/visit-site-button-grad.gif',
 272'wp-admin/link-category.php',
 273'wp-admin/sidebar.php',
 274'wp-includes/classes.php',
 275'wp-includes/js/tinymce/blank.htm',
 276'wp-includes/js/tinymce/plugins/media/css/content.css',
 277'wp-includes/js/tinymce/plugins/media/img',
 278'wp-includes/js/tinymce/plugins/safari',
 279// 3.2
 280'wp-admin/images/logo-login.gif',
 281'wp-admin/images/star.gif',
 282'wp-admin/js/list-table.dev.js',
 283'wp-admin/js/list-table.js',
 284'wp-includes/default-embeds.php',
 285'wp-includes/js/tinymce/plugins/wordpress/img/help.gif',
 286'wp-includes/js/tinymce/plugins/wordpress/img/more.gif',
 287'wp-includes/js/tinymce/plugins/wordpress/img/toolbars.gif',
 288'wp-includes/js/tinymce/themes/advanced/img/fm.gif',
 289'wp-includes/js/tinymce/themes/advanced/img/sflogo.png',
 290// 3.3
 291'wp-admin/css/colors-classic-rtl.css',
 292'wp-admin/css/colors-classic-rtl.dev.css',
 293'wp-admin/css/colors-fresh-rtl.css',
 294'wp-admin/css/colors-fresh-rtl.dev.css',
 295'wp-admin/css/dashboard-rtl.dev.css',
 296'wp-admin/css/dashboard.dev.css',
 297'wp-admin/css/global-rtl.css',
 298'wp-admin/css/global-rtl.dev.css',
 299'wp-admin/css/global.css',
 300'wp-admin/css/global.dev.css',
 301'wp-admin/css/install-rtl.dev.css',
 302'wp-admin/css/login-rtl.dev.css',
 303'wp-admin/css/login.dev.css',
 304'wp-admin/css/ms.css',
 305'wp-admin/css/ms.dev.css',
 306'wp-admin/css/nav-menu-rtl.css',
 307'wp-admin/css/nav-menu-rtl.dev.css',
 308'wp-admin/css/nav-menu.css',
 309'wp-admin/css/nav-menu.dev.css',
 310'wp-admin/css/plugin-install-rtl.css',
 311'wp-admin/css/plugin-install-rtl.dev.css',
 312'wp-admin/css/plugin-install.css',
 313'wp-admin/css/plugin-install.dev.css',
 314'wp-admin/css/press-this-rtl.dev.css',
 315'wp-admin/css/press-this.dev.css',
 316'wp-admin/css/theme-editor-rtl.css',
 317'wp-admin/css/theme-editor-rtl.dev.css',
 318'wp-admin/css/theme-editor.css',
 319'wp-admin/css/theme-editor.dev.css',
 320'wp-admin/css/theme-install-rtl.css',
 321'wp-admin/css/theme-install-rtl.dev.css',
 322'wp-admin/css/theme-install.css',
 323'wp-admin/css/theme-install.dev.css',
 324'wp-admin/css/widgets-rtl.dev.css',
 325'wp-admin/css/widgets.dev.css',
 326'wp-admin/includes/internal-linking.php',
 327'wp-includes/images/admin-bar-sprite-rtl.png',
 328'wp-includes/js/jquery/ui.button.js',
 329'wp-includes/js/jquery/ui.core.js',
 330'wp-includes/js/jquery/ui.dialog.js',
 331'wp-includes/js/jquery/ui.draggable.js',
 332'wp-includes/js/jquery/ui.droppable.js',
 333'wp-includes/js/jquery/ui.mouse.js',
 334'wp-includes/js/jquery/ui.position.js',
 335'wp-includes/js/jquery/ui.resizable.js',
 336'wp-includes/js/jquery/ui.selectable.js',
 337'wp-includes/js/jquery/ui.sortable.js',
 338'wp-includes/js/jquery/ui.tabs.js',
 339'wp-includes/js/jquery/ui.widget.js',
 340'wp-includes/js/l10n.dev.js',
 341'wp-includes/js/l10n.js',
 342'wp-includes/js/tinymce/plugins/wplink/css',
 343'wp-includes/js/tinymce/plugins/wplink/img',
 344'wp-includes/js/tinymce/plugins/wplink/js',
 345'wp-includes/js/tinymce/themes/advanced/img/wpicons.png',
 346'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/butt2.png',
 347'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/button_bg.png',
 348'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/down_arrow.gif',
 349'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/fade-butt.png',
 350'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/separator.gif',
 351// Don't delete, yet: 'wp-rss.php',
 352// Don't delete, yet: 'wp-rdf.php',
 353// Don't delete, yet: 'wp-rss2.php',
 354// Don't delete, yet: 'wp-commentsrss2.php',
 355// Don't delete, yet: 'wp-atom.php',
 356// Don't delete, yet: 'wp-feed.php',
 357// 3.4
 358'wp-admin/images/gray-star.png',
 359'wp-admin/images/logo-login.png',
 360'wp-admin/images/star.png',
 361'wp-admin/index-extra.php',
 362'wp-admin/network/index-extra.php',
 363'wp-admin/user/index-extra.php',
 364'wp-admin/images/screenshots/admin-flyouts.png',
 365'wp-admin/images/screenshots/coediting.png',
 366'wp-admin/images/screenshots/drag-and-drop.png',
 367'wp-admin/images/screenshots/help-screen.png',
 368'wp-admin/images/screenshots/media-icon.png',
 369'wp-admin/images/screenshots/new-feature-pointer.png',
 370'wp-admin/images/screenshots/welcome-screen.png',
 371'wp-includes/css/editor-buttons.css',
 372'wp-includes/css/editor-buttons.dev.css',
 373'wp-includes/js/tinymce/plugins/paste/blank.htm',
 374'wp-includes/js/tinymce/plugins/wordpress/css',
 375'wp-includes/js/tinymce/plugins/wordpress/editor_plugin.dev.js',
 376'wp-includes/js/tinymce/plugins/wordpress/img/embedded.png',
 377'wp-includes/js/tinymce/plugins/wordpress/img/more_bug.gif',
 378'wp-includes/js/tinymce/plugins/wordpress/img/page_bug.gif',
 379'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin.dev.js',
 380'wp-includes/js/tinymce/plugins/wpeditimage/css/editimage-rtl.css',
 381'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin.dev.js',
 382'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin.dev.js',
 383'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin.dev.js',
 384'wp-includes/js/tinymce/plugins/wpgallery/img/gallery.png',
 385'wp-includes/js/tinymce/plugins/wplink/editor_plugin.dev.js',
 386// Don't delete, yet: 'wp-pass.php',
 387// Don't delete, yet: 'wp-register.php',
 388// 3.5
 389'wp-admin/gears-manifest.php',
 390'wp-admin/includes/manifest.php',
 391'wp-admin/images/archive-link.png',
 392'wp-admin/images/blue-grad.png',
 393'wp-admin/images/button-grad-active.png',
 394'wp-admin/images/button-grad.png',
 395'wp-admin/images/ed-bg-vs.gif',
 396'wp-admin/images/ed-bg.gif',
 397'wp-admin/images/fade-butt.png',
 398'wp-admin/images/fav-arrow-rtl.gif',
 399'wp-admin/images/fav-arrow.gif',
 400'wp-admin/images/fav-vs.png',
 401'wp-admin/images/fav.png',
 402'wp-admin/images/gray-grad.png',
 403'wp-admin/images/loading-publish.gif',
 404'wp-admin/images/logo-ghost.png',
 405'wp-admin/images/logo.gif',
 406'wp-admin/images/menu-arrow-frame-rtl.png',
 407'wp-admin/images/menu-arrow-frame.png',
 408'wp-admin/images/menu-arrows.gif',
 409'wp-admin/images/menu-bits-rtl-vs.gif',
 410'wp-admin/images/menu-bits-rtl.gif',
 411'wp-admin/images/menu-bits-vs.gif',
 412'wp-admin/images/menu-bits.gif',
 413'wp-admin/images/menu-dark-rtl-vs.gif',
 414'wp-admin/images/menu-dark-rtl.gif',
 415'wp-admin/images/menu-dark-vs.gif',
 416'wp-admin/images/menu-dark.gif',
 417'wp-admin/images/required.gif',
 418'wp-admin/images/screen-options-toggle-vs.gif',
 419'wp-admin/images/screen-options-toggle.gif',
 420'wp-admin/images/toggle-arrow-rtl.gif',
 421'wp-admin/images/toggle-arrow.gif',
 422'wp-admin/images/upload-classic.png',
 423'wp-admin/images/upload-fresh.png',
 424'wp-admin/images/white-grad-active.png',
 425'wp-admin/images/white-grad.png',
 426'wp-admin/images/widgets-arrow-vs.gif',
 427'wp-admin/images/widgets-arrow.gif',
 428'wp-admin/images/wpspin_dark.gif',
 429'wp-includes/images/upload.png',
 430'wp-includes/js/prototype.js',
 431'wp-includes/js/scriptaculous',
 432'wp-admin/css/wp-admin-rtl.dev.css',
 433'wp-admin/css/wp-admin.dev.css',
 434'wp-admin/css/media-rtl.dev.css',
 435'wp-admin/css/media.dev.css',
 436'wp-admin/css/colors-classic.dev.css',
 437'wp-admin/css/customize-controls-rtl.dev.css',
 438'wp-admin/css/customize-controls.dev.css',
 439'wp-admin/css/ie-rtl.dev.css',
 440'wp-admin/css/ie.dev.css',
 441'wp-admin/css/install.dev.css',
 442'wp-admin/css/colors-fresh.dev.css',
 443'wp-includes/js/customize-base.dev.js',
 444'wp-includes/js/json2.dev.js',
 445'wp-includes/js/comment-reply.dev.js',
 446'wp-includes/js/customize-preview.dev.js',
 447'wp-includes/js/wplink.dev.js',
 448'wp-includes/js/tw-sack.dev.js',
 449'wp-includes/js/wp-list-revisions.dev.js',
 450'wp-includes/js/autosave.dev.js',
 451'wp-includes/js/admin-bar.dev.js',
 452'wp-includes/js/quicktags.dev.js',
 453'wp-includes/js/wp-ajax-response.dev.js',
 454'wp-includes/js/wp-pointer.dev.js',
 455'wp-includes/js/hoverIntent.dev.js',
 456'wp-includes/js/colorpicker.dev.js',
 457'wp-includes/js/wp-lists.dev.js',
 458'wp-includes/js/customize-loader.dev.js',
 459'wp-includes/js/jquery/jquery.table-hotkeys.dev.js',
 460'wp-includes/js/jquery/jquery.color.dev.js',
 461'wp-includes/js/jquery/jquery.color.js',
 462'wp-includes/js/jquery/jquery.hotkeys.dev.js',
 463'wp-includes/js/jquery/jquery.form.dev.js',
 464'wp-includes/js/jquery/suggest.dev.js',
 465'wp-admin/js/xfn.dev.js',
 466'wp-admin/js/set-post-thumbnail.dev.js',
 467'wp-admin/js/comment.dev.js',
 468'wp-admin/js/theme.dev.js',
 469'wp-admin/js/cat.dev.js',
 470'wp-admin/js/password-strength-meter.dev.js',
 471'wp-admin/js/user-profile.dev.js',
 472'wp-admin/js/theme-preview.dev.js',
 473'wp-admin/js/post.dev.js',
 474'wp-admin/js/media-upload.dev.js',
 475'wp-admin/js/word-count.dev.js',
 476'wp-admin/js/plugin-install.dev.js',
 477'wp-admin/js/edit-comments.dev.js',
 478'wp-admin/js/media-gallery.dev.js',
 479'wp-admin/js/custom-fields.dev.js',
 480'wp-admin/js/custom-background.dev.js',
 481'wp-admin/js/common.dev.js',
 482'wp-admin/js/inline-edit-tax.dev.js',
 483'wp-admin/js/gallery.dev.js',
 484'wp-admin/js/utils.dev.js',
 485'wp-admin/js/widgets.dev.js',
 486'wp-admin/js/wp-fullscreen.dev.js',
 487'wp-admin/js/nav-menu.dev.js',
 488'wp-admin/js/dashboard.dev.js',
 489'wp-admin/js/link.dev.js',
 490'wp-admin/js/user-suggest.dev.js',
 491'wp-admin/js/postbox.dev.js',
 492'wp-admin/js/tags.dev.js',
 493'wp-admin/js/image-edit.dev.js',
 494'wp-admin/js/media.dev.js',
 495'wp-admin/js/customize-controls.dev.js',
 496'wp-admin/js/inline-edit-post.dev.js',
 497'wp-admin/js/categories.dev.js',
 498'wp-admin/js/editor.dev.js',
 499'wp-includes/js/tinymce/plugins/wpeditimage/js/editimage.dev.js',
 500'wp-includes/js/tinymce/plugins/wpdialogs/js/popup.dev.js',
 501'wp-includes/js/tinymce/plugins/wpdialogs/js/wpdialog.dev.js',
 502'wp-includes/js/plupload/handlers.dev.js',
 503'wp-includes/js/plupload/wp-plupload.dev.js',
 504'wp-includes/js/swfupload/handlers.dev.js',
 505'wp-includes/js/jcrop/jquery.Jcrop.dev.js',
 506'wp-includes/js/jcrop/jquery.Jcrop.js',
 507'wp-includes/js/jcrop/jquery.Jcrop.css',
 508'wp-includes/js/imgareaselect/jquery.imgareaselect.dev.js',
 509'wp-includes/css/wp-pointer.dev.css',
 510'wp-includes/css/editor.dev.css',
 511'wp-includes/css/jquery-ui-dialog.dev.css',
 512'wp-includes/css/admin-bar-rtl.dev.css',
 513'wp-includes/css/admin-bar.dev.css',
 514'wp-includes/js/jquery/ui/jquery.effects.clip.min.js',
 515'wp-includes/js/jquery/ui/jquery.effects.scale.min.js',
 516'wp-includes/js/jquery/ui/jquery.effects.blind.min.js',
 517'wp-includes/js/jquery/ui/jquery.effects.core.min.js',
 518'wp-includes/js/jquery/ui/jquery.effects.shake.min.js',
 519'wp-includes/js/jquery/ui/jquery.effects.fade.min.js',
 520'wp-includes/js/jquery/ui/jquery.effects.explode.min.js',
 521'wp-includes/js/jquery/ui/jquery.effects.slide.min.js',
 522'wp-includes/js/jquery/ui/jquery.effects.drop.min.js',
 523'wp-includes/js/jquery/ui/jquery.effects.highlight.min.js',
 524'wp-includes/js/jquery/ui/jquery.effects.bounce.min.js',
 525'wp-includes/js/jquery/ui/jquery.effects.pulsate.min.js',
 526'wp-includes/js/jquery/ui/jquery.effects.transfer.min.js',
 527'wp-includes/js/jquery/ui/jquery.effects.fold.min.js',
 528'wp-admin/images/screenshots/captions-1.png',
 529'wp-admin/images/screenshots/captions-2.png',
 530'wp-admin/images/screenshots/flex-header-1.png',
 531'wp-admin/images/screenshots/flex-header-2.png',
 532'wp-admin/images/screenshots/flex-header-3.png',
 533'wp-admin/images/screenshots/flex-header-media-library.png',
 534'wp-admin/images/screenshots/theme-customizer.png',
 535'wp-admin/images/screenshots/twitter-embed-1.png',
 536'wp-admin/images/screenshots/twitter-embed-2.png',
 537'wp-admin/js/utils.js',
 538'wp-admin/options-privacy.php',
 539'wp-app.php',
 540'wp-includes/class-wp-atom-server.php',
 541'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/ui.css',
 542// 3.5.2
 543'wp-includes/js/swfupload/swfupload-all.js',
 544// 3.6
 545'wp-admin/js/revisions-js.php',
 546'wp-admin/images/screenshots',
 547'wp-admin/js/categories.js',
 548'wp-admin/js/categories.min.js',
 549'wp-admin/js/custom-fields.js',
 550'wp-admin/js/custom-fields.min.js',
 551// 3.7
 552'wp-admin/js/cat.js',
 553'wp-admin/js/cat.min.js',
 554'wp-includes/js/tinymce/plugins/wpeditimage/js/editimage.min.js',
 555// 3.8
 556'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/page_bug.gif',
 557'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/more_bug.gif',
 558'wp-includes/js/thickbox/tb-close-2x.png',
 559'wp-includes/js/thickbox/tb-close.png',
 560'wp-includes/images/wpmini-blue-2x.png',
 561'wp-includes/images/wpmini-blue.png',
 562'wp-admin/css/colors-fresh.css',
 563'wp-admin/css/colors-classic.css',
 564'wp-admin/css/colors-fresh.min.css',
 565'wp-admin/css/colors-classic.min.css',
 566'wp-admin/js/about.min.js',
 567'wp-admin/js/about.js',
 568'wp-admin/images/arrows-dark-vs-2x.png',
 569'wp-admin/images/wp-logo-vs.png',
 570'wp-admin/images/arrows-dark-vs.png',
 571'wp-admin/images/wp-logo.png',
 572'wp-admin/images/arrows-pr.png',
 573'wp-admin/images/arrows-dark.png',
 574'wp-admin/images/press-this.png',
 575'wp-admin/images/press-this-2x.png',
 576'wp-admin/images/arrows-vs-2x.png',
 577'wp-admin/images/welcome-icons.png',
 578'wp-admin/images/wp-logo-2x.png',
 579'wp-admin/images/stars-rtl-2x.png',
 580'wp-admin/images/arrows-dark-2x.png',
 581'wp-admin/images/arrows-pr-2x.png',
 582'wp-admin/images/menu-shadow-rtl.png',
 583'wp-admin/images/arrows-vs.png',
 584'wp-admin/images/about-search-2x.png',
 585'wp-admin/images/bubble_bg-rtl-2x.gif',
 586'wp-admin/images/wp-badge-2x.png',
 587'wp-admin/images/wordpress-logo-2x.png',
 588'wp-admin/images/bubble_bg-rtl.gif',
 589'wp-admin/images/wp-badge.png',
 590'wp-admin/images/menu-shadow.png',
 591'wp-admin/images/about-globe-2x.png',
 592'wp-admin/images/welcome-icons-2x.png',
 593'wp-admin/images/stars-rtl.png',
 594'wp-admin/images/wp-logo-vs-2x.png',
 595'wp-admin/images/about-updates-2x.png',
 596// 3.9
 597'wp-admin/css/colors.css',
 598'wp-admin/css/colors.min.css',
 599'wp-admin/css/colors-rtl.css',
 600'wp-admin/css/colors-rtl.min.css',
 601'wp-admin/css/media-rtl.min.css',
 602'wp-admin/css/media.min.css',
 603'wp-admin/css/farbtastic-rtl.min.css',
 604'wp-admin/images/lock-2x.png',
 605'wp-admin/images/lock.png',
 606'wp-admin/js/theme-preview.js',
 607'wp-admin/js/theme-install.min.js',
 608'wp-admin/js/theme-install.js',
 609'wp-admin/js/theme-preview.min.js',
 610'wp-includes/js/plupload/plupload.html4.js',
 611'wp-includes/js/plupload/plupload.html5.js',
 612'wp-includes/js/plupload/changelog.txt',
 613'wp-includes/js/plupload/plupload.silverlight.js',
 614'wp-includes/js/plupload/plupload.flash.js',
 615'wp-includes/js/plupload/plupload.js',
 616'wp-includes/js/tinymce/plugins/spellchecker',
 617'wp-includes/js/tinymce/plugins/inlinepopups',
 618'wp-includes/js/tinymce/plugins/media/js',
 619'wp-includes/js/tinymce/plugins/media/css',
 620'wp-includes/js/tinymce/plugins/wordpress/img',
 621'wp-includes/js/tinymce/plugins/wpdialogs/js',
 622'wp-includes/js/tinymce/plugins/wpeditimage/img',
 623'wp-includes/js/tinymce/plugins/wpeditimage/js',
 624'wp-includes/js/tinymce/plugins/wpeditimage/css',
 625'wp-includes/js/tinymce/plugins/wpgallery/img',
 626'wp-includes/js/tinymce/plugins/wpfullscreen/css',
 627'wp-includes/js/tinymce/plugins/paste/js',
 628'wp-includes/js/tinymce/themes/advanced',
 629'wp-includes/js/tinymce/tiny_mce.js',
 630'wp-includes/js/tinymce/mark_loaded_src.js',
 631'wp-includes/js/tinymce/wp-tinymce-schema.js',
 632'wp-includes/js/tinymce/plugins/media/editor_plugin.js',
 633'wp-includes/js/tinymce/plugins/media/editor_plugin_src.js',
 634'wp-includes/js/tinymce/plugins/media/media.htm',
 635'wp-includes/js/tinymce/plugins/wpview/editor_plugin_src.js',
 636'wp-includes/js/tinymce/plugins/wpview/editor_plugin.js',
 637'wp-includes/js/tinymce/plugins/directionality/editor_plugin.js',
 638'wp-includes/js/tinymce/plugins/directionality/editor_plugin_src.js',
 639'wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js',
 640'wp-includes/js/tinymce/plugins/wordpress/editor_plugin_src.js',
 641'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin_src.js',
 642'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin.js',
 643'wp-includes/js/tinymce/plugins/wpeditimage/editimage.html',
 644'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin.js',
 645'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin_src.js',
 646'wp-includes/js/tinymce/plugins/fullscreen/editor_plugin_src.js',
 647'wp-includes/js/tinymce/plugins/fullscreen/fullscreen.htm',
 648'wp-includes/js/tinymce/plugins/fullscreen/editor_plugin.js',
 649'wp-includes/js/tinymce/plugins/wplink/editor_plugin_src.js',
 650'wp-includes/js/tinymce/plugins/wplink/editor_plugin.js',
 651'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin_src.js',
 652'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin.js',
 653'wp-includes/js/tinymce/plugins/tabfocus/editor_plugin.js',
 654'wp-includes/js/tinymce/plugins/tabfocus/editor_plugin_src.js',
 655'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin.js',
 656'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin_src.js',
 657'wp-includes/js/tinymce/plugins/paste/editor_plugin.js',
 658'wp-includes/js/tinymce/plugins/paste/pasteword.htm',
 659'wp-includes/js/tinymce/plugins/paste/editor_plugin_src.js',
 660'wp-includes/js/tinymce/plugins/paste/pastetext.htm',
 661'wp-includes/js/tinymce/langs/wp-langs.php',
 662// 4.1
 663'wp-includes/js/jquery/ui/jquery.ui.accordion.min.js',
 664'wp-includes/js/jquery/ui/jquery.ui.autocomplete.min.js',
 665'wp-includes/js/jquery/ui/jquery.ui.button.min.js',
 666'wp-includes/js/jquery/ui/jquery.ui.core.min.js',
 667'wp-includes/js/jquery/ui/jquery.ui.datepicker.min.js',
 668'wp-includes/js/jquery/ui/jquery.ui.dialog.min.js',
 669'wp-includes/js/jquery/ui/jquery.ui.draggable.min.js',
 670'wp-includes/js/jquery/ui/jquery.ui.droppable.min.js',
 671'wp-includes/js/jquery/ui/jquery.ui.effect-blind.min.js',
 672'wp-includes/js/jquery/ui/jquery.ui.effect-bounce.min.js',
 673'wp-includes/js/jquery/ui/jquery.ui.effect-clip.min.js',
 674'wp-includes/js/jquery/ui/jquery.ui.effect-drop.min.js',
 675'wp-includes/js/jquery/ui/jquery.ui.effect-explode.min.js',
 676'wp-includes/js/jquery/ui/jquery.ui.effect-fade.min.js',
 677'wp-includes/js/jquery/ui/jquery.ui.effect-fold.min.js',
 678'wp-includes/js/jquery/ui/jquery.ui.effect-highlight.min.js',
 679'wp-includes/js/jquery/ui/jquery.ui.effect-pulsate.min.js',
 680'wp-includes/js/jquery/ui/jquery.ui.effect-scale.min.js',
 681'wp-includes/js/jquery/ui/jquery.ui.effect-shake.min.js',
 682'wp-includes/js/jquery/ui/jquery.ui.effect-slide.min.js',
 683'wp-includes/js/jquery/ui/jquery.ui.effect-transfer.min.js',
 684'wp-includes/js/jquery/ui/jquery.ui.effect.min.js',
 685'wp-includes/js/jquery/ui/jquery.ui.menu.min.js',
 686'wp-includes/js/jquery/ui/jquery.ui.mouse.min.js',
 687'wp-includes/js/jquery/ui/jquery.ui.position.min.js',
 688'wp-includes/js/jquery/ui/jquery.ui.progressbar.min.js',
 689'wp-includes/js/jquery/ui/jquery.ui.resizable.min.js',
 690'wp-includes/js/jquery/ui/jquery.ui.selectable.min.js',
 691'wp-includes/js/jquery/ui/jquery.ui.slider.min.js',
 692'wp-includes/js/jquery/ui/jquery.ui.sortable.min.js',
 693'wp-includes/js/jquery/ui/jquery.ui.spinner.min.js',
 694'wp-includes/js/jquery/ui/jquery.ui.tabs.min.js',
 695'wp-includes/js/jquery/ui/jquery.ui.tooltip.min.js',
 696'wp-includes/js/jquery/ui/jquery.ui.widget.min.js',
 697'wp-includes/js/tinymce/skins/wordpress/images/dashicon-no-alt.png'
 698);
 699
 700/**
 701 * Stores new files in wp-content to copy
 702 *
 703 * The contents of this array indicate any new bundled plugins/themes which
 704 * should be installed with the WordPress Upgrade. These items will not be
 705 * re-installed in future upgrades, this behaviour is controlled by the
 706 * introduced version present here being older than the current installed version.
 707 *
 708 * The content of this array should follow the following format:
 709 * Filename (relative to wp-content) => Introduced version
 710 * Directories should be noted by suffixing it with a trailing slash (/)
 711 *
 712 * @since 3.2.0
 713 * @global array $_new_bundled_files
 714 * @var array
 715 * @name $_new_bundled_files
 716 */
 717global $_new_bundled_files;
 718
 719$_new_bundled_files = array(
 720	'plugins/akismet/'       => '2.0',
 721	'themes/twentyten/'      => '3.0',
 722	'themes/twentyeleven/'   => '3.2',
 723	'themes/twentytwelve/'   => '3.5',
 724	'themes/twentythirteen/' => '3.6',
 725	'themes/twentyfourteen/' => '3.8',
 726	'themes/twentyfifteen/'  => '4.1',
 727);
 728
 729/**
 730 * Upgrade the core of WordPress.
 731 *
 732 * This will create a .maintenance file at the base of the WordPress directory
 733 * to ensure that people can not access the web site, when the files are being
 734 * copied to their locations.
 735 *
 736 * The files in the {@link $_old_files} list will be removed and the new files
 737 * copied from the zip file after the database is upgraded.
 738 *
 739 * The files in the {@link $_new_bundled_files} list will be added to the installation
 740 * if the version is greater than or equal to the old version being upgraded.
 741 *
 742 * The steps for the upgrader for after the new release is downloaded and
 743 * unzipped is:
 744 *   1. Test unzipped location for select files to ensure that unzipped worked.
 745 *   2. Create the .maintenance file in current WordPress base.
 746 *   3. Copy new WordPress directory over old WordPress files.
 747 *   4. Upgrade WordPress to new version.
 748 *     4.1. Copy all files/folders other than wp-content
 749 *     4.2. Copy any language files to WP_LANG_DIR (which may differ from WP_CONTENT_DIR
 750 *     4.3. Copy any new bundled themes/plugins to their respective locations
 751 *   5. Delete new WordPress directory path.
 752 *   6. Delete .maintenance file.
 753 *   7. Remove old files.
 754 *   8. Delete 'update_core' option.
 755 *
 756 * There are several areas of failure. For instance if PHP times out before step
 757 * 6, then you will not be able to access any portion of your site. Also, since
 758 * the upgrade will not continue where it left off, you will not be able to
 759 * automatically remove old files and remove the 'update_core' option. This
 760 * isn't that bad.
 761 *
 762 * If the copy of the new WordPress over the old fails, then the worse is that
 763 * the new WordPress directory will remain.
 764 *
 765 * If it is assumed that every file will be copied over, including plugins and
 766 * themes, then if you edit the default theme, you should rename it, so that
 767 * your changes remain.
 768 *
 769 * @since 2.7.0
 770 *
 771 * @param string $from New release unzipped path.
 772 * @param string $to Path to old WordPress installation.
 773 * @return WP_Error|null WP_Error on failure, null on success.
 774 */
 775function update_core($from, $to) {
 776	global $wp_filesystem, $_old_files, $_new_bundled_files, $wpdb;
 777
 778	@set_time_limit( 300 );
 779
 780	/**
 781	 * Filter feedback messages displayed during the core update process.
 782	 *
 783	 * The filter is first evaluated after the zip file for the latest version
 784	 * has been downloaded and unzipped. It is evaluated five more times during
 785	 * the process:
 786	 *
 787	 * 1. Before WordPress begins the core upgrade process.
 788	 * 2. Before Maintenance Mode is enabled.
 789	 * 3. Before WordPress begins copying over the necessary files.
 790	 * 4. Before Maintenance Mode is disabled.
 791	 * 5. Before the database is upgraded.
 792	 *
 793	 * @since 2.5.0
 794	 *
 795	 * @param string $feedback The core update feedback messages.
 796	 */
 797	apply_filters( 'update_feedback', __( 'Verifying the unpacked files&#8230;' ) );
 798
 799	// Sanity check the unzipped distribution.
 800	$distro = '';
 801	$roots = array( '/wordpress/', '/wordpress-mu/' );
 802	foreach ( $roots as $root ) {
 803		if ( $wp_filesystem->exists( $from . $root . 'readme.html' ) && $wp_filesystem->exists( $from . $root . 'wp-includes/version.php' ) ) {
 804			$distro = $root;
 805			break;
 806		}
 807	}
 808	if ( ! $distro ) {
 809		$wp_filesystem->delete( $from, true );
 810		return new WP_Error( 'insane_distro', __('The update could not be unpacked') );
 811	}
 812
 813	// Import $wp_version, $required_php_version, and $required_mysql_version from the new version
 814	// $wp_filesystem->wp_content_dir() returned unslashed pre-2.8
 815	global $wp_version, $required_php_version, $required_mysql_version;
 816
 817	$versions_file = trailingslashit( $wp_filesystem->wp_content_dir() ) . 'upgrade/version-current.php';
 818	if ( ! $wp_filesystem->copy( $from . $distro . 'wp-includes/version.php', $versions_file ) ) {
 819		$wp_filesystem->delete( $from, true );
 820		return new WP_Error( 'copy_failed_for_version_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-includes/version.php' );
 821	}
 822
 823	$wp_filesystem->chmod( $versions_file, FS_CHMOD_FILE );
 824	require( WP_CONTENT_DIR . '/upgrade/version-current.php' );
 825	$wp_filesystem->delete( $versions_file );
 826
 827	$php_version    = phpversion();
 828	$mysql_version  = $wpdb->db_version();
 829	$old_wp_version = $wp_version; // The version of WordPress we're updating from
 830	$development_build = ( false !== strpos( $old_wp_version . $wp_version, '-' )  ); // a dash in the version indicates a Development release
 831	$php_compat     = version_compare( $php_version, $required_php_version, '>=' );
 832	if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
 833		$mysql_compat = true;
 834	else
 835		$mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );
 836
 837	if ( !$mysql_compat || !$php_compat )
 838		$wp_filesystem->delete($from, true);
 839
 840	if ( !$mysql_compat && !$php_compat )
 841		return new WP_Error( 'php_mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.'), $wp_version, $required_php_version, $required_mysql_version, $php_version, $mysql_version ) );
 842	elseif ( !$php_compat )
 843		return new WP_Error( 'php_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires PHP version %2$s or higher. You are running version %3$s.'), $wp_version, $required_php_version, $php_version ) );
 844	elseif ( !$mysql_compat )
 845		return new WP_Error( 'mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress %1$s requires MySQL version %2$s or higher. You are running version %3$s.'), $wp_version, $required_mysql_version, $mysql_version ) );
 846
 847	/** This filter is documented in wp-admin/includes/update-core.php */
 848	apply_filters( 'update_feedback', __( 'Preparing to install the latest version&#8230;' ) );
 849
 850	// Don't copy wp-content, we'll deal with that below
 851	// We also copy version.php last so failed updates report their old version
 852	$skip = array( 'wp-content', 'wp-includes/version.php' );
 853	$check_is_writable = array();
 854
 855	// Check to see which files don't really need updating - only available for 3.7 and higher
 856	if ( function_exists( 'get_core_checksums' ) ) {
 857		// Find the local version of the working directory
 858		$working_dir_local = WP_CONTENT_DIR . '/upgrade/' . basename( $from ) . $distro;
 859
 860		$checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
 861		if ( is_array( $checksums ) && isset( $checksums[ $wp_version ] ) )
 862			$checksums = $checksums[ $wp_version ]; // Compat code for 3.7-beta2
 863		if ( is_array( $checksums ) ) {
 864			foreach( $checksums as $file => $checksum ) {
 865				if ( 'wp-content' == substr( $file, 0, 10 ) )
 866					continue;
 867				if ( ! file_exists( ABSPATH . $file ) )
 868					continue;
 869				if ( ! file_exists( $working_dir_local . $file ) )
 870					continue;
 871				if ( md5_file( ABSPATH . $file ) === $checksum )
 872					$skip[] = $file;
 873				else
 874					$check_is_writable[ $file ] = ABSPATH . $file;
 875			}
 876		}
 877	}
 878
 879	// If we're using the direct method, we can predict write failures that are due to permissions.
 880	if ( $check_is_writable && 'direct' === $wp_filesystem->method ) {
 881		$files_writable = array_filter( $check_is_writable, array( $wp_filesystem, 'is_writable' ) );
 882		if ( $files_writable !== $check_is_writable ) {
 883			$files_not_writable = array_diff_key( $check_is_writable, $files_writable );
 884			foreach ( $files_not_writable as $relative_file_not_writable => $file_not_writable ) {
 885				// If the writable check failed, chmod file to 0644 and try again, same as copy_dir().
 886				$wp_filesystem->chmod( $file_not_writable, FS_CHMOD_FILE );
 887				if ( $wp_filesystem->is_writable( $file_not_writable ) )
 888					unset( $files_not_writable[ $relative_file_not_writable ] );
 889			}
 890
 891			// Store package-relative paths (the key) of non-writable files in the WP_Error object.
 892			$error_data = version_compare( $old_wp_version, '3.7-beta2', '>' ) ? array_keys( $files_not_writable ) : '';
 893
 894			if ( $files_not_writable )
 895				return new WP_Error( 'files_not_writable', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), implode( ', ', $error_data ) );
 896		}
 897	}
 898
 899	/** This filter is documented in wp-admin/includes/update-core.php */
 900	apply_filters( 'update_feedback', __( 'Enabling Maintenance mode&#8230;' ) );
 901	// Create maintenance file to signal that we are upgrading
 902	$maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
 903	$maintenance_file = $to . '.maintenance';
 904	$wp_filesystem->delete($maintenance_file);
 905	$wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
 906
 907	/** This filter is documented in wp-admin/includes/update-core.php */
 908	apply_filters( 'update_feedback', __( 'Copying the required files&#8230;' ) );
 909	// Copy new versions of WP files into place.
 910	$result = _copy_dir( $from . $distro, $to, $skip );
 911	if ( is_wp_error( $result ) )
 912		$result = new WP_Error( $result->get_error_code(), $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) );
 913
 914	// Since we know the core files have copied over, we can now copy the version file
 915	if ( ! is_wp_error( $result ) ) {
 916		if ( ! $wp_filesystem->copy( $from . $distro . 'wp-includes/version.php', $to . 'wp-includes/version.php', true /* overwrite */ ) ) {
 917			$wp_filesystem->delete( $from, true );
 918			$result = new WP_Error( 'copy_failed_for_version_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-includes/version.php' );
 919		}
 920		$wp_filesystem->chmod( $to . 'wp-includes/version.php', FS_CHMOD_FILE );
 921	}
 922
 923	// Check to make sure everything copied correctly, ignoring the contents of wp-content
 924	$skip = array( 'wp-content' );
 925	$failed = array();
 926	if ( isset( $checksums ) && is_array( $checksums ) ) {
 927		foreach ( $checksums as $file => $checksum ) {
 928			if ( 'wp-content' == substr( $file, 0, 10 ) )
 929				continue;
 930			if ( ! file_exists( $working_dir_local . $file ) )
 931				continue;
 932			if ( file_exists( ABSPATH . $file ) && md5_file( ABSPATH . $file ) == $checksum )
 933				$skip[] = $file;
 934			else
 935				$failed[] = $file;
 936		}
 937	}
 938
 939	// Some files didn't copy properly
 940	if ( ! empty( $failed ) ) {
 941		$total_size = 0;
 942		foreach ( $failed as $file ) {
 943			if ( file_exists( $working_dir_local . $file ) )
 944				$total_size += filesize( $working_dir_local . $file );
 945		}
 946
 947		// If we don't have enough free space, it isn't worth trying again.
 948		// Unlikely to be hit due to the check in unzip_file().
 949		$available_space = @disk_free_space( ABSPATH );
 950		if ( $available_space && $total_size >= $available_space ) {
 951			$result = new WP_Error( 'disk_full', __( 'There is not enough free disk space to complete the update.' ) );
 952		} else {
 953			$result = _copy_dir( $from . $distro, $to, $skip );
 954			if ( is_wp_error( $result ) )
 955				$result = new WP_Error( $result->get_error_code() . '_retry', $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) );
 956		}
 957	}
 958
 959	// Custom Content Directory needs updating now.
 960	// Copy Languages
 961	if ( !is_wp_error($result) && $wp_filesystem->is_dir($from . $distro . 'wp-content/languages') ) {
 962		if ( WP_LANG_DIR != ABSPATH . WPINC . '/languages' || @is_dir(WP_LANG_DIR) )
 963			$lang_dir = WP_LANG_DIR;
 964		else
 965			$lang_dir = WP_CONTENT_DIR . '/languages';
 966
 967		if ( !@is_dir($lang_dir) && 0 === strpos($lang_dir, ABSPATH) ) { // Check the language directory exists first
 968			$wp_filesystem->mkdir($to . str_replace(ABSPATH, '', $lang_dir), FS_CHMOD_DIR); // If it's within the ABSPATH we can handle it here, otherwise they're out of luck.
 969			clearstatcache(); // for FTP, Need to clear the stat cache
 970		}
 971
 972		if ( @is_dir($lang_dir) ) {
 973			$wp_lang_dir = $wp_filesystem->find_folder($lang_dir);
 974			if ( $wp_lang_dir ) {
 975				$result = copy_dir($from . $distro . 'wp-content/languages/', $wp_lang_dir);
 976				if ( is_wp_error( $result ) )
 977					$result = new WP_Error( $result->get_error_code() . '_languages', $result->get_error_message(), substr( $result->get_error_data(), strlen( $wp_lang_dir ) ) );
 978			}
 979		}
 980	}
 981
 982	/** This filter is documented in wp-admin/includes/update-core.php */
 983	apply_filters( 'update_feedback', __( 'Disabling Maintenance mode&#8230;' ) );
 984	// Remove maintenance file, we're done with potential site-breaking changes
 985	$wp_filesystem->delete( $maintenance_file );
 986
 987	// 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve.
 988	if ( '3.5' == $old_wp_version ) {
 989		if ( is_dir( WP_CONTENT_DIR . '/themes/twentytwelve' ) && ! file_exists( WP_CONTENT_DIR . '/themes/twentytwelve/style.css' )  ) {
 990			$wp_filesystem->delete( $wp_filesystem->wp_themes_dir() . 'twentytwelve/' );
 991		}
 992	}
 993
 994	// Copy New bundled plugins & themes
 995	// This gives us the ability to install new plugins & themes bundled with future versions of WordPress whilst avoiding the re-install upon upgrade issue.
 996	// $development_build controls us overwriting bundled themes and plugins when a non-stable release is being updated
 997	if ( !is_wp_error($result) && ( ! defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
 998		foreach ( (array) $_new_bundled_files as $file => $introduced_version ) {
 999			// If a $development_build or if $introduced version is greater than what the site was previously running
1000			if ( $development_build || version_compare( $introduced_version, $old_wp_version, '>' ) ) {
1001				$directory = ('/' == $file[ strlen($file)-1 ]);
1002				list($type, $filename) = explode('/', $file, 2);
1003
1004				// Check to see if the bundled items exist before attempting to copy them
1005				if ( ! $wp_filesystem->exists( $from . $distro . 'wp-content/' . $file ) )
1006					continue;
1007
1008				if ( 'plugins' == $type )
1009					$dest = $wp_filesystem->wp_plugins_dir();
1010				elseif ( 'themes' == $type )
1011					$dest = trailingslashit($wp_filesystem->wp_themes_dir()); // Back-compat, ::wp_themes_dir() did not return trailingslash'd pre-3.2
1012				else
1013					continue;
1014
1015				if ( ! $directory ) {
1016					if ( ! $development_build && $wp_filesystem->exists( $dest . $filename ) )
1017						continue;
1018
1019					if ( ! $wp_filesystem->copy($from . $distro . 'wp-content/' . $file, $dest . $filename, FS_CHMOD_FILE) )
1020						$result = new WP_Error( "copy_failed_for_new_bundled_$type", __( 'Could not copy file.' ), $dest . $filename );
1021				} else {
1022					if ( ! $development_build && $wp_filesystem->is_dir( $dest . $filename ) )
1023						continue;
1024
1025					$wp_filesystem->mkdir($dest . $filename, FS_CHMOD_DIR);
1026					$_result = copy_dir( $from . $distro . 'wp-content/' . $file, $dest . $filename);
1027
1028					// If a error occurs partway through this final step, keep the error flowing through, but keep process going.
1029					if ( is_wp_error( $_result ) ) {
1030						if ( ! is_wp_error( $result ) )
1031							$result = new WP_Error;
1032						$result->add( $_result->get_error_code() . "_$type", $_result->get_error_message(), substr( $_result->get_error_data(), strlen( $dest ) ) );
1033					}
1034				}
1035			}
1036		} //end foreach
1037	}
1038
1039	// Handle $result error from the above blocks
1040	if ( is_wp_error($result) ) {
1041		$wp_filesystem->delete($from, true);
1042		return $result;
1043	}
1044
1045	// Remove old files
1046	foreach ( $_old_files as $old_file ) {
1047		$old_file = $to . $old_file;
1048		if ( !$wp_filesystem->exists($old_file) )
1049			continue;
1050		$wp_filesystem->delete($old_file, true);
1051	}
1052
1053	// Remove any Genericons example.html's from the filesystem
1054	_upgrade_422_remove_genericons();
1055
1056	// Upgrade DB with separate request
1057	/** This filter is documented in wp-admin/includes/update-core.php */
1058	apply_filters( 'update_feedback', __( 'Upgrading database&#8230;' ) );
1059	$db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
1060	wp_remote_post($db_upgrade_url, array('timeout' => 60));
1061
1062	// Clear the cache to prevent an update_option() from saving a stale db_version to the cache
1063	wp_cache_flush();
1064	// (Not all cache backends listen to 'flush')
1065	wp_cache_delete( 'alloptions', 'options' );
1066
1067	// Remove working directory
1068	$wp_filesystem->delete($from, true);
1069
1070	// Force refresh of update information
1071	if ( function_exists('delete_site_transient') )
1072		delete_site_transient('update_core');
1073	else
1074		delete_option('update_core');
1075
1076	/**
1077	 * Fires after WordPress core has been successfully updated.
1078	 *
1079	 * @since 3.3.0
1080	 *
1081	 * @param string $wp_version The current WordPress version.
1082	 */
1083	do_action( '_core_updated_successfully', $wp_version );
1084
1085	// Clear the option that blocks auto updates after failures, now that we've been successful.
1086	if ( function_exists( 'delete_site_option' ) )
1087		delete_site_option( 'auto_core_update_failed' );
1088
1089	return $wp_version;
1090}
1091
1092/**
1093 * Copies a directory from one location to another via the WordPress Filesystem Abstraction.
1094 * Assumes that WP_Filesystem() has already been called and setup.
1095 *
1096 * This is a temporary function for the 3.1 -> 3.2 upgrade, as well as for those upgrading to
1097 * 3.7+
1098 *
1099 * @ignore
1100 * @since 3.2.0
1101 * @since 3.7.0 Updated not to use a regular expression for the skip list
1102 * @see copy_dir()
1103 *
1104 * @param string $from source directory
1105 * @param string $to destination directory
1106 * @param array $skip_list a list of files/folders to skip copying
1107 * @return mixed WP_Error on failure, True on success.
1108 */
1109function _copy_dir($from, $to, $skip_list = array() ) {
1110	global $wp_filesystem;
1111
1112	$dirlist = $wp_filesystem->dirlist($from);
1113
1114	$from = trailingslashit($from);
1115	$to = trailingslashit($to);
1116
1117	foreach ( (array) $dirlist as $filename => $fileinfo ) {
1118		if ( in_array( $filename, $skip_list ) )
1119			continue;
1120
1121		if ( 'f' == $fileinfo['type'] ) {
1122			if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) ) {
1123				// If copy failed, chmod file to 0644 and try again.
1124				$wp_filesystem->chmod( $to . $filename, FS_CHMOD_FILE );
1125				if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) )
1126					return new WP_Error( 'copy_failed__copy_dir', __( 'Could not copy file.' ), $to . $filename );
1127			}
1128		} elseif ( 'd' == $fileinfo['type'] ) {
1129			if ( !$wp_filesystem->is_dir($to . $filename) ) {
1130				if ( !$wp_filesystem->mkdir($to . $filename, FS_CHMOD_DIR) )
1131					return new WP_Error( 'mkdir_failed__copy_dir', __( 'Could not create directory.' ), $to . $filename );
1132			}
1133
1134			/*
1135			 * Generate the $sub_skip_list for the subdirectory as a sub-set
1136			 * of the existing $skip_list.
1137			 */
1138			$sub_skip_list = array();
1139			foreach ( $skip_list as $skip_item ) {
1140				if ( 0 === strpos( $skip_item, $filename . '/' ) )
1141					$sub_skip_list[] = preg_replace( '!^' . preg_quote( $filename, '!' ) . '/!i', '', $skip_item );
1142			}
1143
1144			$result = _copy_dir($from . $filename, $to . $filename, $sub_skip_list);
1145			if ( is_wp_error($result) )
1146				return $result;
1147		}
1148	}
1149	return true;
1150}
1151
1152/**
1153 * Redirect to the About WordPress page after a successful upgrade.
1154 *
1155 * This function is only needed when the existing install is older than 3.4.0.
1156 *
1157 * @since 3.3.0
1158 *
1159 */
1160function _redirect_to_about_wordpress( $new_version ) {
1161	global $wp_version, $pagenow, $action;
1162
1163	if ( version_compare( $wp_version, '3.4-RC1', '>=' ) )
1164		return;
1165
1166	// Ensure we only run this on the update-core.php page. The Core_Upgrader may be used in other contexts.
1167	if ( 'update-core.php' != $pagenow )
1168		return;
1169
1170 	if ( 'do-core-upgrade' != $action && 'do-core-reinstall' != $action )
1171 		return;
1172
1173	// Load the updated default text localization domain for new strings.
1174	load_default_textdomain();
1175
1176	// See do_core_upgrade()
1177	show_message( __('WordPress updated successfully') );
1178
1179	// self_admin_url() won't exist when upgrading from <= 3.0, so relative URLs are intentional.
1180	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
1181	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
1182	echo '</div>';
1183	?>
1184<script type="text/javascript">
1185window.location = 'about.php?updated';
1186</script>
1187	<?php
1188
1189	// Include admin-footer.php and exit.
1190	include(ABSPATH . 'wp-admin/admin-footer.php');
1191	exit();
1192}
1193add_action( '_core_updated_successfully', '_redirect_to_about_wordpress' );
1194
1195/**
1196 * Cleans up Genericons example files.
1197 *
1198 * @since 4.2.2
1199 */
1200function _upgrade_422_remove_genericons() {
1201	global $wp_theme_directories, $wp_filesystem;
1202
1203	// A list of the affected files using the filesystem absolute paths.
1204	$affected_files = array();
1205
1206	// Themes
1207	foreach ( $wp_theme_directories as $directory ) {
1208		$affected_theme_files = _upgrade_422_find_genericons_files_in_folder( $directory );
1209		$affected_files       = array_merge( $affected_files, $affected_theme_files );
1210	}
1211
1212	// Plugins
1213	$affected_plugin_files = _upgrade_422_find_genericons_files_in_folder( WP_PLUGIN_DIR );
1214	$affected_files        = array_merge( $affected_files, $affected_plugin_files );
1215
1216	foreach ( $affected_files as $file ) {
1217		$gen_dir = $wp_filesystem->find_folder( trailingslashit( dirname( $file ) ) );
1218		if ( empty( $gen_dir ) ) {
1219			continue;
1220		}
1221
1222		// The path when the file is accessed via WP_Filesystem may differ in the case of FTP
1223		$remote_file = $gen_dir . basename( $file );
1224
1225		if ( ! $wp_filesystem->exists( $remote_file ) ) {
1226			continue;
1227		}
1228
1229		if ( ! $wp_filesystem->delete( $remote_file, false, 'f' ) ) {
1230			$wp_filesystem->put_contents( $remote_file, '' );
1231		}
1232	}
1233}
1234
1235/**
1236 * Recursively find Genericons example files in a given folder.
1237 *
1238 * @ignore
1239 * @since 4.2.2
1240 *
1241 * @param string $directory Directory path. Expects trailingslashed.
1242 * @return array
1243 */
1244function _upgrade_422_find_genericons_files_in_folder( $directory ) {
1245	$directory = trailingslashit( $directory );
1246	$files     = array();
1247
1248	if ( file_exists( "{$directory}example.html" ) && false !== strpos( file_get_contents( "{$directory}example.html" ), '<title>Genericons</title…

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