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PHP Script  |  2018-01-15  |  54.5 KB  |  1,394 lines
  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.  */
  18. global $_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. // Following files added back in 4.5 see #36083
  602. // 'wp-admin/css/media-rtl.min.css',
  603. // 'wp-admin/css/media.min.css',
  604. // 'wp-admin/css/farbtastic-rtl.min.css',
  605. 'wp-admin/images/lock-2x.png',
  606. 'wp-admin/images/lock.png',
  607. 'wp-admin/js/theme-preview.js',
  608. 'wp-admin/js/theme-install.min.js',
  609. 'wp-admin/js/theme-install.js',
  610. 'wp-admin/js/theme-preview.min.js',
  611. 'wp-includes/js/plupload/plupload.html4.js',
  612. 'wp-includes/js/plupload/plupload.html5.js',
  613. 'wp-includes/js/plupload/changelog.txt',
  614. 'wp-includes/js/plupload/plupload.silverlight.js',
  615. 'wp-includes/js/plupload/plupload.flash.js',
  616. // Added back in 4.9 [41328], see #41755
  617. // 'wp-includes/js/plupload/plupload.js',
  618. 'wp-includes/js/tinymce/plugins/spellchecker',
  619. 'wp-includes/js/tinymce/plugins/inlinepopups',
  620. 'wp-includes/js/tinymce/plugins/media/js',
  621. 'wp-includes/js/tinymce/plugins/media/css',
  622. 'wp-includes/js/tinymce/plugins/wordpress/img',
  623. 'wp-includes/js/tinymce/plugins/wpdialogs/js',
  624. 'wp-includes/js/tinymce/plugins/wpeditimage/img',
  625. 'wp-includes/js/tinymce/plugins/wpeditimage/js',
  626. 'wp-includes/js/tinymce/plugins/wpeditimage/css',
  627. 'wp-includes/js/tinymce/plugins/wpgallery/img',
  628. 'wp-includes/js/tinymce/plugins/wpfullscreen/css',
  629. 'wp-includes/js/tinymce/plugins/paste/js',
  630. 'wp-includes/js/tinymce/themes/advanced',
  631. 'wp-includes/js/tinymce/tiny_mce.js',
  632. 'wp-includes/js/tinymce/mark_loaded_src.js',
  633. 'wp-includes/js/tinymce/wp-tinymce-schema.js',
  634. 'wp-includes/js/tinymce/plugins/media/editor_plugin.js',
  635. 'wp-includes/js/tinymce/plugins/media/editor_plugin_src.js',
  636. 'wp-includes/js/tinymce/plugins/media/media.htm',
  637. 'wp-includes/js/tinymce/plugins/wpview/editor_plugin_src.js',
  638. 'wp-includes/js/tinymce/plugins/wpview/editor_plugin.js',
  639. 'wp-includes/js/tinymce/plugins/directionality/editor_plugin.js',
  640. 'wp-includes/js/tinymce/plugins/directionality/editor_plugin_src.js',
  641. 'wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js',
  642. 'wp-includes/js/tinymce/plugins/wordpress/editor_plugin_src.js',
  643. 'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin_src.js',
  644. 'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin.js',
  645. 'wp-includes/js/tinymce/plugins/wpeditimage/editimage.html',
  646. 'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin.js',
  647. 'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin_src.js',
  648. 'wp-includes/js/tinymce/plugins/fullscreen/editor_plugin_src.js',
  649. 'wp-includes/js/tinymce/plugins/fullscreen/fullscreen.htm',
  650. 'wp-includes/js/tinymce/plugins/fullscreen/editor_plugin.js',
  651. 'wp-includes/js/tinymce/plugins/wplink/editor_plugin_src.js',
  652. 'wp-includes/js/tinymce/plugins/wplink/editor_plugin.js',
  653. 'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin_src.js',
  654. 'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin.js',
  655. 'wp-includes/js/tinymce/plugins/tabfocus/editor_plugin.js',
  656. 'wp-includes/js/tinymce/plugins/tabfocus/editor_plugin_src.js',
  657. 'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin.js',
  658. 'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin_src.js',
  659. 'wp-includes/js/tinymce/plugins/paste/editor_plugin.js',
  660. 'wp-includes/js/tinymce/plugins/paste/pasteword.htm',
  661. 'wp-includes/js/tinymce/plugins/paste/editor_plugin_src.js',
  662. 'wp-includes/js/tinymce/plugins/paste/pastetext.htm',
  663. 'wp-includes/js/tinymce/langs/wp-langs.php',
  664. // 4.1
  665. 'wp-includes/js/jquery/ui/jquery.ui.accordion.min.js',
  666. 'wp-includes/js/jquery/ui/jquery.ui.autocomplete.min.js',
  667. 'wp-includes/js/jquery/ui/jquery.ui.button.min.js',
  668. 'wp-includes/js/jquery/ui/jquery.ui.core.min.js',
  669. 'wp-includes/js/jquery/ui/jquery.ui.datepicker.min.js',
  670. 'wp-includes/js/jquery/ui/jquery.ui.dialog.min.js',
  671. 'wp-includes/js/jquery/ui/jquery.ui.draggable.min.js',
  672. 'wp-includes/js/jquery/ui/jquery.ui.droppable.min.js',
  673. 'wp-includes/js/jquery/ui/jquery.ui.effect-blind.min.js',
  674. 'wp-includes/js/jquery/ui/jquery.ui.effect-bounce.min.js',
  675. 'wp-includes/js/jquery/ui/jquery.ui.effect-clip.min.js',
  676. 'wp-includes/js/jquery/ui/jquery.ui.effect-drop.min.js',
  677. 'wp-includes/js/jquery/ui/jquery.ui.effect-explode.min.js',
  678. 'wp-includes/js/jquery/ui/jquery.ui.effect-fade.min.js',
  679. 'wp-includes/js/jquery/ui/jquery.ui.effect-fold.min.js',
  680. 'wp-includes/js/jquery/ui/jquery.ui.effect-highlight.min.js',
  681. 'wp-includes/js/jquery/ui/jquery.ui.effect-pulsate.min.js',
  682. 'wp-includes/js/jquery/ui/jquery.ui.effect-scale.min.js',
  683. 'wp-includes/js/jquery/ui/jquery.ui.effect-shake.min.js',
  684. 'wp-includes/js/jquery/ui/jquery.ui.effect-slide.min.js',
  685. 'wp-includes/js/jquery/ui/jquery.ui.effect-transfer.min.js',
  686. 'wp-includes/js/jquery/ui/jquery.ui.effect.min.js',
  687. 'wp-includes/js/jquery/ui/jquery.ui.menu.min.js',
  688. 'wp-includes/js/jquery/ui/jquery.ui.mouse.min.js',
  689. 'wp-includes/js/jquery/ui/jquery.ui.position.min.js',
  690. 'wp-includes/js/jquery/ui/jquery.ui.progressbar.min.js',
  691. 'wp-includes/js/jquery/ui/jquery.ui.resizable.min.js',
  692. 'wp-includes/js/jquery/ui/jquery.ui.selectable.min.js',
  693. 'wp-includes/js/jquery/ui/jquery.ui.slider.min.js',
  694. 'wp-includes/js/jquery/ui/jquery.ui.sortable.min.js',
  695. 'wp-includes/js/jquery/ui/jquery.ui.spinner.min.js',
  696. 'wp-includes/js/jquery/ui/jquery.ui.tabs.min.js',
  697. 'wp-includes/js/jquery/ui/jquery.ui.tooltip.min.js',
  698. 'wp-includes/js/jquery/ui/jquery.ui.widget.min.js',
  699. 'wp-includes/js/tinymce/skins/wordpress/images/dashicon-no-alt.png',
  700. // 4.3
  701. 'wp-admin/js/wp-fullscreen.js',
  702. 'wp-admin/js/wp-fullscreen.min.js',
  703. 'wp-includes/js/tinymce/wp-mce-help.php',
  704. 'wp-includes/js/tinymce/plugins/wpfullscreen',
  705. // 4.5
  706. 'wp-includes/theme-compat/comments-popup.php',
  707. // 4.6
  708. 'wp-admin/includes/class-wp-automatic-upgrader.php', // Wrong file name, see #37628.
  709. // 4.8
  710. 'wp-includes/js/tinymce/plugins/wpembed',
  711. 'wp-includes/js/tinymce/plugins/media/moxieplayer.swf',
  712. 'wp-includes/js/tinymce/skins/lightgray/fonts/readme.md',
  713. 'wp-includes/js/tinymce/skins/lightgray/fonts/tinymce-small.json',
  714. 'wp-includes/js/tinymce/skins/lightgray/fonts/tinymce.json',
  715. 'wp-includes/js/tinymce/skins/lightgray/skin.ie7.min.css',
  716. // 4.9
  717. 'wp-admin/css/press-this-editor-rtl.css',
  718. 'wp-admin/css/press-this-editor-rtl.min.css',
  719. 'wp-admin/css/press-this-editor.css',
  720. 'wp-admin/css/press-this-editor.min.css',
  721. 'wp-admin/css/press-this-rtl.css',
  722. 'wp-admin/css/press-this-rtl.min.css',
  723. 'wp-admin/css/press-this.css',
  724. 'wp-admin/css/press-this.min.css',
  725. 'wp-admin/includes/class-wp-press-this.php',
  726. 'wp-admin/js/bookmarklet.js',
  727. 'wp-admin/js/bookmarklet.min.js',
  728. 'wp-admin/js/press-this.js',
  729. 'wp-admin/js/press-this.min.js',
  730. 'wp-includes/js/mediaelement/background.png',
  731. 'wp-includes/js/mediaelement/bigplay.png',
  732. 'wp-includes/js/mediaelement/bigplay.svg',
  733. 'wp-includes/js/mediaelement/controls.png',
  734. 'wp-includes/js/mediaelement/controls.svg',
  735. 'wp-includes/js/mediaelement/flashmediaelement.swf',
  736. 'wp-includes/js/mediaelement/froogaloop.min.js',
  737. 'wp-includes/js/mediaelement/jumpforward.png',
  738. 'wp-includes/js/mediaelement/loading.gif',
  739. 'wp-includes/js/mediaelement/silverlightmediaelement.xap',
  740. 'wp-includes/js/mediaelement/skipback.png',
  741. 'wp-includes/js/plupload/plupload.flash.swf',
  742. 'wp-includes/js/plupload/plupload.full.min.js',
  743. 'wp-includes/js/plupload/plupload.silverlight.xap',
  744. 'wp-includes/js/swfupload/plugins',
  745. 'wp-includes/js/swfupload/swfupload.swf',
  746.     // 4.9.2
  747.     'wp-includes/js/mediaelement/lang',
  748.     'wp-includes/js/mediaelement/lang/ca.js',
  749.     'wp-includes/js/mediaelement/lang/cs.js',
  750.     'wp-includes/js/mediaelement/lang/de.js',
  751.     'wp-includes/js/mediaelement/lang/es.js',
  752.     'wp-includes/js/mediaelement/lang/fa.js',
  753.     'wp-includes/js/mediaelement/lang/fr.js',
  754.     'wp-includes/js/mediaelement/lang/hr.js',
  755.     'wp-includes/js/mediaelement/lang/hu.js',
  756.     'wp-includes/js/mediaelement/lang/it.js',
  757.     'wp-includes/js/mediaelement/lang/ja.js',
  758.     'wp-includes/js/mediaelement/lang/ko.js',
  759.     'wp-includes/js/mediaelement/lang/nl.js',
  760.     'wp-includes/js/mediaelement/lang/pl.js',
  761.     'wp-includes/js/mediaelement/lang/pt.js',
  762.     'wp-includes/js/mediaelement/lang/ro.js',
  763.     'wp-includes/js/mediaelement/lang/ru.js',
  764.     'wp-includes/js/mediaelement/lang/sk.js',
  765.     'wp-includes/js/mediaelement/lang/sv.js',
  766.     'wp-includes/js/mediaelement/lang/uk.js',
  767.     'wp-includes/js/mediaelement/lang/zh-cn.js',
  768.     'wp-includes/js/mediaelement/lang/zh.js',
  769.     'wp-includes/js/mediaelement/mediaelement-flash-audio-ogg.swf',
  770.     'wp-includes/js/mediaelement/mediaelement-flash-audio.swf',
  771.     'wp-includes/js/mediaelement/mediaelement-flash-video-hls.swf',
  772.     'wp-includes/js/mediaelement/mediaelement-flash-video-mdash.swf',
  773.     'wp-includes/js/mediaelement/mediaelement-flash-video.swf',
  774.     'wp-includes/js/mediaelement/renderers/dailymotion.js',
  775.     'wp-includes/js/mediaelement/renderers/dailymotion.min.js',
  776.     'wp-includes/js/mediaelement/renderers/facebook.js',
  777.     'wp-includes/js/mediaelement/renderers/facebook.min.js',
  778.     'wp-includes/js/mediaelement/renderers/soundcloud.js',
  779.     'wp-includes/js/mediaelement/renderers/soundcloud.min.js',
  780.     'wp-includes/js/mediaelement/renderers/twitch.js',
  781.     'wp-includes/js/mediaelement/renderers/twitch.min.js',
  782. );
  783.  
  784. /**
  785.  * Stores new files in wp-content to copy
  786.  *
  787.  * The contents of this array indicate any new bundled plugins/themes which
  788.  * should be installed with the WordPress Upgrade. These items will not be
  789.  * re-installed in future upgrades, this behaviour is controlled by the
  790.  * introduced version present here being older than the current installed version.
  791.  *
  792.  * The content of this array should follow the following format:
  793.  * Filename (relative to wp-content) => Introduced version
  794.  * Directories should be noted by suffixing it with a trailing slash (/)
  795.  *
  796.  * @since 3.2.0
  797.  * @since 4.7.0 New themes were not automatically installed for 4.4-4.6 on
  798.  *              upgrade. New themes are now installed again. To disable new
  799.  *              themes from being installed on upgrade, explicitly define
  800.  *              CORE_UPGRADE_SKIP_NEW_BUNDLED as false.
  801.  * @global array $_new_bundled_files
  802.  * @var array
  803.  * @name $_new_bundled_files
  804.  */
  805. global $_new_bundled_files;
  806.  
  807. $_new_bundled_files = array(
  808.     'plugins/akismet/'        => '2.0',
  809.     'themes/twentyten/'       => '3.0',
  810.     'themes/twentyeleven/'    => '3.2',
  811.     'themes/twentytwelve/'    => '3.5',
  812.     'themes/twentythirteen/'  => '3.6',
  813.     'themes/twentyfourteen/'  => '3.8',
  814.     'themes/twentyfifteen/'   => '4.1',
  815.     'themes/twentysixteen/'   => '4.4',
  816.     'themes/twentyseventeen/' => '4.7',
  817. );
  818.  
  819. /**
  820.  * Upgrades the core of WordPress.
  821.  *
  822.  * This will create a .maintenance file at the base of the WordPress directory
  823.  * to ensure that people can not access the web site, when the files are being
  824.  * copied to their locations.
  825.  *
  826.  * The files in the `$_old_files` list will be removed and the new files
  827.  * copied from the zip file after the database is upgraded.
  828.  *
  829.  * The files in the `$_new_bundled_files` list will be added to the installation
  830.  * if the version is greater than or equal to the old version being upgraded.
  831.  *
  832.  * The steps for the upgrader for after the new release is downloaded and
  833.  * unzipped is:
  834.  *   1. Test unzipped location for select files to ensure that unzipped worked.
  835.  *   2. Create the .maintenance file in current WordPress base.
  836.  *   3. Copy new WordPress directory over old WordPress files.
  837.  *   4. Upgrade WordPress to new version.
  838.  *     4.1. Copy all files/folders other than wp-content
  839.  *     4.2. Copy any language files to WP_LANG_DIR (which may differ from WP_CONTENT_DIR
  840.  *     4.3. Copy any new bundled themes/plugins to their respective locations
  841.  *   5. Delete new WordPress directory path.
  842.  *   6. Delete .maintenance file.
  843.  *   7. Remove old files.
  844.  *   8. Delete 'update_core' option.
  845.  *
  846.  * There are several areas of failure. For instance if PHP times out before step
  847.  * 6, then you will not be able to access any portion of your site. Also, since
  848.  * the upgrade will not continue where it left off, you will not be able to
  849.  * automatically remove old files and remove the 'update_core' option. This
  850.  * isn't that bad.
  851.  *
  852.  * If the copy of the new WordPress over the old fails, then the worse is that
  853.  * the new WordPress directory will remain.
  854.  *
  855.  * If it is assumed that every file will be copied over, including plugins and
  856.  * themes, then if you edit the default theme, you should rename it, so that
  857.  * your changes remain.
  858.  *
  859.  * @since 2.7.0
  860.  *
  861.  * @global WP_Filesystem_Base $wp_filesystem
  862.  * @global array              $_old_files
  863.  * @global array              $_new_bundled_files
  864.  * @global wpdb               $wpdb
  865.  * @global string             $wp_version
  866.  * @global string             $required_php_version
  867.  * @global string             $required_mysql_version
  868.  *
  869.  * @param string $from New release unzipped path.
  870.  * @param string $to   Path to old WordPress installation.
  871.  * @return WP_Error|null WP_Error on failure, null on success.
  872.  */
  873. function update_core($from, $to) {
  874.     global $wp_filesystem, $_old_files, $_new_bundled_files, $wpdb;
  875.  
  876.     @set_time_limit( 300 );
  877.  
  878.     /**
  879.      * Filters feedback messages displayed during the core update process.
  880.      *
  881.      * The filter is first evaluated after the zip file for the latest version
  882.      * has been downloaded and unzipped. It is evaluated five more times during
  883.      * the process:
  884.      *
  885.      * 1. Before WordPress begins the core upgrade process.
  886.      * 2. Before Maintenance Mode is enabled.
  887.      * 3. Before WordPress begins copying over the necessary files.
  888.      * 4. Before Maintenance Mode is disabled.
  889.      * 5. Before the database is upgraded.
  890.      *
  891.      * @since 2.5.0
  892.      *
  893.      * @param string $feedback The core update feedback messages.
  894.      */
  895.     apply_filters( 'update_feedback', __( 'Verifying the unpacked files…' ) );
  896.  
  897.     // Sanity check the unzipped distribution.
  898.     $distro = '';
  899.     $roots = array( '/wordpress/', '/wordpress-mu/' );
  900.     foreach ( $roots as $root ) {
  901.         if ( $wp_filesystem->exists( $from . $root . 'readme.html' ) && $wp_filesystem->exists( $from . $root . 'wp-includes/version.php' ) ) {
  902.             $distro = $root;
  903.             break;
  904.         }
  905.     }
  906.     if ( ! $distro ) {
  907.         $wp_filesystem->delete( $from, true );
  908.         return new WP_Error( 'insane_distro', __('The update could not be unpacked') );
  909.     }
  910.  
  911.  
  912.     /*
  913.      * Import $wp_version, $required_php_version, and $required_mysql_version from the new version.
  914.      * DO NOT globalise any variables imported from `version-current.php` in this function.
  915.      *
  916.      * BC Note: $wp_filesystem->wp_content_dir() returned unslashed pre-2.8
  917.      */
  918.     $versions_file = trailingslashit( $wp_filesystem->wp_content_dir() ) . 'upgrade/version-current.php';
  919.     if ( ! $wp_filesystem->copy( $from . $distro . 'wp-includes/version.php', $versions_file ) ) {
  920.         $wp_filesystem->delete( $from, true );
  921.         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' );
  922.     }
  923.  
  924.     $wp_filesystem->chmod( $versions_file, FS_CHMOD_FILE );
  925.     require( WP_CONTENT_DIR . '/upgrade/version-current.php' );
  926.     $wp_filesystem->delete( $versions_file );
  927.  
  928.     $php_version    = phpversion();
  929.     $mysql_version  = $wpdb->db_version();
  930.     $old_wp_version = $GLOBALS['wp_version']; // The version of WordPress we're updating from
  931.     $development_build = ( false !== strpos( $old_wp_version . $wp_version, '-' )  ); // a dash in the version indicates a Development release
  932.     $php_compat     = version_compare( $php_version, $required_php_version, '>=' );
  933.     if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
  934.         $mysql_compat = true;
  935.     else
  936.         $mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );
  937.  
  938.     if ( !$mysql_compat || !$php_compat )
  939.         $wp_filesystem->delete($from, true);
  940.  
  941.     if ( !$mysql_compat && !$php_compat )
  942.         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, $mysql_version ) );
  943.     elseif ( !$php_compat )
  944.         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, $php_version ) );
  945.     elseif ( !$mysql_compat )
  946.         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 ) );
  947.  
  948.     /** This filter is documented in wp-admin/includes/update-core.php */
  949.     apply_filters( 'update_feedback', __( 'Preparing to install the latest version…' ) );
  950.  
  951.     // Don't copy wp-content, we'll deal with that below
  952.     // We also copy version.php last so failed updates report their old version
  953.     $skip = array( 'wp-content', 'wp-includes/version.php' );
  954.     $check_is_writable = array();
  955.  
  956.     // Check to see which files don't really need updating - only available for 3.7 and higher
  957.     if ( function_exists( 'get_core_checksums' ) ) {
  958.         // Find the local version of the working directory
  959.         $working_dir_local = WP_CONTENT_DIR . '/upgrade/' . basename( $from ) . $distro;
  960.  
  961.         $checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
  962.         if ( is_array( $checksums ) && isset( $checksums[ $wp_version ] ) )
  963.             $checksums = $checksums[ $wp_version ]; // Compat code for 3.7-beta2
  964.         if ( is_array( $checksums ) ) {
  965.             foreach ( $checksums as $file => $checksum ) {
  966.                 if ( 'wp-content' == substr( $file, 0, 10 ) )
  967.                     continue;
  968.                 if ( ! file_exists( ABSPATH . $file ) )
  969.                     continue;
  970.                 if ( ! file_exists( $working_dir_local . $file ) )
  971.                     continue;
  972.                 if ( '.' === dirname( $file ) && in_array( pathinfo( $file, PATHINFO_EXTENSION ), array( 'html', 'txt' ) ) )
  973.                     continue;
  974.                 if ( md5_file( ABSPATH . $file ) === $checksum )
  975.                     $skip[] = $file;
  976.                 else
  977.                     $check_is_writable[ $file ] = ABSPATH . $file;
  978.             }
  979.         }
  980.     }
  981.  
  982.     // If we're using the direct method, we can predict write failures that are due to permissions.
  983.     if ( $check_is_writable && 'direct' === $wp_filesystem->method ) {
  984.         $files_writable = array_filter( $check_is_writable, array( $wp_filesystem, 'is_writable' ) );
  985.         if ( $files_writable !== $check_is_writable ) {
  986.             $files_not_writable = array_diff_key( $check_is_writable, $files_writable );
  987.             foreach ( $files_not_writable as $relative_file_not_writable => $file_not_writable ) {
  988.                 // If the writable check failed, chmod file to 0644 and try again, same as copy_dir().
  989.                 $wp_filesystem->chmod( $file_not_writable, FS_CHMOD_FILE );
  990.                 if ( $wp_filesystem->is_writable( $file_not_writable ) )
  991.                     unset( $files_not_writable[ $relative_file_not_writable ] );
  992.             }
  993.  
  994.             // Store package-relative paths (the key) of non-writable files in the WP_Error object.
  995.             $error_data = version_compare( $old_wp_version, '3.7-beta2', '>' ) ? array_keys( $files_not_writable ) : '';
  996.  
  997.             if ( $files_not_writable )
  998.                 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 ) );
  999.         }
  1000.     }
  1001.  
  1002.     /** This filter is documented in wp-admin/includes/update-core.php */
  1003.     apply_filters( 'update_feedback', __( 'Enabling Maintenance mode…' ) );
  1004.     // Create maintenance file to signal that we are upgrading
  1005.     $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
  1006.     $maintenance_file = $to . '.maintenance';
  1007.     $wp_filesystem->delete($maintenance_file);
  1008.     $wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
  1009.  
  1010.     /** This filter is documented in wp-admin/includes/update-core.php */
  1011.     apply_filters( 'update_feedback', __( 'Copying the required files…' ) );
  1012.     // Copy new versions of WP files into place.
  1013.     $result = _copy_dir( $from . $distro, $to, $skip );
  1014.     if ( is_wp_error( $result ) )
  1015.         $result = new WP_Error( $result->get_error_code(), $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) );
  1016.  
  1017.     // Since we know the core files have copied over, we can now copy the version file
  1018.     if ( ! is_wp_error( $result ) ) {
  1019.         if ( ! $wp_filesystem->copy( $from . $distro . 'wp-includes/version.php', $to . 'wp-includes/version.php', true /* overwrite */ ) ) {
  1020.             $wp_filesystem->delete( $from, true );
  1021.             $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' );
  1022.         }
  1023.         $wp_filesystem->chmod( $to . 'wp-includes/version.php', FS_CHMOD_FILE );
  1024.     }
  1025.  
  1026.     // Check to make sure everything copied correctly, ignoring the contents of wp-content
  1027.     $skip = array( 'wp-content' );
  1028.     $failed = array();
  1029.     if ( isset( $checksums ) && is_array( $checksums ) ) {
  1030.         foreach ( $checksums as $file => $checksum ) {
  1031.             if ( 'wp-content' == substr( $file, 0, 10 ) )
  1032.                 continue;
  1033.             if ( ! file_exists( $working_dir_local . $file ) )
  1034.                 continue;
  1035.             if ( '.' === dirname( $file ) && in_array( pathinfo( $file, PATHINFO_EXTENSION ), array( 'html', 'txt' ) ) ) {
  1036.                 $skip[] = $file;
  1037.                 continue;
  1038.             }
  1039.             if ( file_exists( ABSPATH . $file ) && md5_file( ABSPATH . $file ) == $checksum )
  1040.                 $skip[] = $file;
  1041.             else
  1042.                 $failed[] = $file;
  1043.         }
  1044.     }
  1045.  
  1046.     // Some files didn't copy properly
  1047.     if ( ! empty( $failed ) ) {
  1048.         $total_size = 0;
  1049.         foreach ( $failed as $file ) {
  1050.             if ( file_exists( $working_dir_local . $file ) )
  1051.                 $total_size += filesize( $working_dir_local . $file );
  1052.         }
  1053.  
  1054.         // If we don't have enough free space, it isn't worth trying again.
  1055.         // Unlikely to be hit due to the check in unzip_file().
  1056.         $available_space = @disk_free_space( ABSPATH );
  1057.         if ( $available_space && $total_size >= $available_space ) {
  1058.             $result = new WP_Error( 'disk_full', __( 'There is not enough free disk space to complete the update.' ) );
  1059.         } else {
  1060.             $result = _copy_dir( $from . $distro, $to, $skip );
  1061.             if ( is_wp_error( $result ) )
  1062.                 $result = new WP_Error( $result->get_error_code() . '_retry', $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) );
  1063.         }
  1064.     }
  1065.  
  1066.     // Custom Content Directory needs updating now.
  1067.     // Copy Languages
  1068.     if ( !is_wp_error($result) && $wp_filesystem->is_dir($from . $distro . 'wp-content/languages') ) {
  1069.         if ( WP_LANG_DIR != ABSPATH . WPINC . '/languages' || @is_dir(WP_LANG_DIR) )
  1070.             $lang_dir = WP_LANG_DIR;
  1071.         else
  1072.             $lang_dir = WP_CONTENT_DIR . '/languages';
  1073.  
  1074.         if ( !@is_dir($lang_dir) && 0 === strpos($lang_dir, ABSPATH) ) { // Check the language directory exists first
  1075.             $wp_filesystem->mkdir($to . str_replace(ABSPATH, '', $lang_dir), FS_CHMOD_DIR); // If it's within the ABSPATH we can handle it here, otherwise they're out of luck.
  1076.             clearstatcache(); // for FTP, Need to clear the stat cache
  1077.         }
  1078.  
  1079.         if ( @is_dir($lang_dir) ) {
  1080.             $wp_lang_dir = $wp_filesystem->find_folder($lang_dir);
  1081.             if ( $wp_lang_dir ) {
  1082.                 $result = copy_dir($from . $distro . 'wp-content/languages/', $wp_lang_dir);
  1083.                 if ( is_wp_error( $result ) )
  1084.                     $result = new WP_Error( $result->get_error_code() . '_languages', $result->get_error_message(), substr( $result->get_error_data(), strlen( $wp_lang_dir ) ) );
  1085.             }
  1086.         }
  1087.     }
  1088.  
  1089.     /** This filter is documented in wp-admin/includes/update-core.php */
  1090.     apply_filters( 'update_feedback', __( 'Disabling Maintenance mode…' ) );
  1091.     // Remove maintenance file, we're done with potential site-breaking changes
  1092.     $wp_filesystem->delete( $maintenance_file );
  1093.  
  1094.     // 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve.
  1095.     if ( '3.5' == $old_wp_version ) {
  1096.         if ( is_dir( WP_CONTENT_DIR . '/themes/twentytwelve' ) && ! file_exists( WP_CONTENT_DIR . '/themes/twentytwelve/style.css' )  ) {
  1097.             $wp_filesystem->delete( $wp_filesystem->wp_themes_dir() . 'twentytwelve/' );
  1098.         }
  1099.     }
  1100.  
  1101.     // Copy New bundled plugins & themes
  1102.     // This gives us the ability to install new plugins & themes bundled with future versions of WordPress whilst avoiding the re-install upon upgrade issue.
  1103.     // $development_build controls us overwriting bundled themes and plugins when a non-stable release is being updated
  1104.     if ( !is_wp_error($result) && ( ! defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
  1105.         foreach ( (array) $_new_bundled_files as $file => $introduced_version ) {
  1106.             // If a $development_build or if $introduced version is greater than what the site was previously running
  1107.             if ( $development_build || version_compare( $introduced_version, $old_wp_version, '>' ) ) {
  1108.                 $directory = ('/' == $file[ strlen($file)-1 ]);
  1109.                 list($type, $filename) = explode('/', $file, 2);
  1110.  
  1111.                 // Check to see if the bundled items exist before attempting to copy them
  1112.                 if ( ! $wp_filesystem->exists( $from . $distro . 'wp-content/' . $file ) )
  1113.                     continue;
  1114.  
  1115.                 if ( 'plugins' == $type )
  1116.                     $dest = $wp_filesystem->wp_plugins_dir();
  1117.                 elseif ( 'themes' == $type )
  1118.                     $dest = trailingslashit($wp_filesystem->wp_themes_dir()); // Back-compat, ::wp_themes_dir() did not return trailingslash'd pre-3.2
  1119.                 else
  1120.                     continue;
  1121.  
  1122.                 if ( ! $directory ) {
  1123.                     if ( ! $development_build && $wp_filesystem->exists( $dest . $filename ) )
  1124.                         continue;
  1125.  
  1126.                     if ( ! $wp_filesystem->copy($from . $distro . 'wp-content/' . $file, $dest . $filename, FS_CHMOD_FILE) )
  1127.                         $result = new WP_Error( "copy_failed_for_new_bundled_$type", __( 'Could not copy file.' ), $dest . $filename );
  1128.                 } else {
  1129.                     if ( ! $development_build && $wp_filesystem->is_dir( $dest . $filename ) )
  1130.                         continue;
  1131.  
  1132.                     $wp_filesystem->mkdir($dest . $filename, FS_CHMOD_DIR);
  1133.                     $_result = copy_dir( $from . $distro . 'wp-content/' . $file, $dest . $filename);
  1134.  
  1135.                     // If a error occurs partway through this final step, keep the error flowing through, but keep process going.
  1136.                     if ( is_wp_error( $_result ) ) {
  1137.                         if ( ! is_wp_error( $result ) )
  1138.                             $result = new WP_Error;
  1139.                         $result->add( $_result->get_error_code() . "_$type", $_result->get_error_message(), substr( $_result->get_error_data(), strlen( $dest ) ) );
  1140.                     }
  1141.                 }
  1142.             }
  1143.         } //end foreach
  1144.     }
  1145.  
  1146.     // Handle $result error from the above blocks
  1147.     if ( is_wp_error($result) ) {
  1148.         $wp_filesystem->delete($from, true);
  1149.         return $result;
  1150.     }
  1151.  
  1152.     // Remove old files
  1153.     foreach ( $_old_files as $old_file ) {
  1154.         $old_file = $to . $old_file;
  1155.         if ( !$wp_filesystem->exists($old_file) )
  1156.             continue;
  1157.  
  1158.         // If the file isn't deleted, try writing an empty string to the file instead.
  1159.         if ( ! $wp_filesystem->delete( $old_file, true ) && $wp_filesystem->is_file( $old_file ) ) {
  1160.             $wp_filesystem->put_contents( $old_file, '' );
  1161.         }
  1162.     }
  1163.  
  1164.     // Remove any Genericons example.html's from the filesystem
  1165.     _upgrade_422_remove_genericons();
  1166.  
  1167.     // Remove the REST API plugin if its version is Beta 4 or lower
  1168.     _upgrade_440_force_deactivate_incompatible_plugins();
  1169.  
  1170.     // Upgrade DB with separate request
  1171.     /** This filter is documented in wp-admin/includes/update-core.php */
  1172.     apply_filters( 'update_feedback', __( 'Upgrading database…' ) );
  1173.     $db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
  1174.     wp_remote_post($db_upgrade_url, array('timeout' => 60));
  1175.  
  1176.     // Clear the cache to prevent an update_option() from saving a stale db_version to the cache
  1177.     wp_cache_flush();
  1178.     // (Not all cache back ends listen to 'flush')
  1179.     wp_cache_delete( 'alloptions', 'options' );
  1180.  
  1181.     // Remove working directory
  1182.     $wp_filesystem->delete($from, true);
  1183.  
  1184.     // Force refresh of update information
  1185.     if ( function_exists('delete_site_transient') )
  1186.         delete_site_transient('update_core');
  1187.     else
  1188.         delete_option('update_core');
  1189.  
  1190.     /**
  1191.      * Fires after WordPress core has been successfully updated.
  1192.      *
  1193.      * @since 3.3.0
  1194.      *
  1195.      * @param string $wp_version The current WordPress version.
  1196.      */
  1197.     do_action( '_core_updated_successfully', $wp_version );
  1198.  
  1199.     // Clear the option that blocks auto updates after failures, now that we've been successful.
  1200.     if ( function_exists( 'delete_site_option' ) )
  1201.         delete_site_option( 'auto_core_update_failed' );
  1202.  
  1203.     return $wp_version;
  1204. }
  1205.  
  1206. /**
  1207.  * Copies a directory from one location to another via the WordPress Filesystem Abstraction.
  1208.  * Assumes that WP_Filesystem() has already been called and setup.
  1209.  *
  1210.  * This is a temporary function for the 3.1 -> 3.2 upgrade, as well as for those upgrading to
  1211.  * 3.7+
  1212.  *
  1213.  * @ignore
  1214.  * @since 3.2.0
  1215.  * @since 3.7.0 Updated not to use a regular expression for the skip list
  1216.  * @see copy_dir()
  1217.  *
  1218.  * @global WP_Filesystem_Base $wp_filesystem
  1219.  *
  1220.  * @param string $from     source directory
  1221.  * @param string $to       destination directory
  1222.  * @param array $skip_list a list of files/folders to skip copying
  1223.  * @return mixed WP_Error on failure, True on success.
  1224.  */
  1225. function _copy_dir($from, $to, $skip_list = array() ) {
  1226.     global $wp_filesystem;
  1227.  
  1228.     $dirlist = $wp_filesystem->dirlist($from);
  1229.  
  1230.     $from = trailingslashit($from);
  1231.     $to = trailingslashit($to);
  1232.  
  1233.     foreach ( (array) $dirlist as $filename => $fileinfo ) {
  1234.         if ( in_array( $filename, $skip_list ) )
  1235.             continue;
  1236.  
  1237.         if ( 'f' == $fileinfo['type'] ) {
  1238.             if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) ) {
  1239.                 // If copy failed, chmod file to 0644 and try again.
  1240.                 $wp_filesystem->chmod( $to . $filename, FS_CHMOD_FILE );
  1241.                 if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) )
  1242.                     return new WP_Error( 'copy_failed__copy_dir', __( 'Could not copy file.' ), $to . $filename );
  1243.             }
  1244.         } elseif ( 'd' == $fileinfo['type'] ) {
  1245.             if ( !$wp_filesystem->is_dir($to . $filename) ) {
  1246.                 if ( !$wp_filesystem->mkdir($to . $filename, FS_CHMOD_DIR) )
  1247.                     return new WP_Error( 'mkdir_failed__copy_dir', __( 'Could not create directory.' ), $to . $filename );
  1248.             }
  1249.  
  1250.             /*
  1251.              * Generate the $sub_skip_list for the subdirectory as a sub-set
  1252.              * of the existing $skip_list.
  1253.              */
  1254.             $sub_skip_list = array();
  1255.             foreach ( $skip_list as $skip_item ) {
  1256.                 if ( 0 === strpos( $skip_item, $filename . '/' ) )
  1257.                     $sub_skip_list[] = preg_replace( '!^' . preg_quote( $filename, '!' ) . '/!i', '', $skip_item );
  1258.             }
  1259.  
  1260.             $result = _copy_dir($from . $filename, $to . $filename, $sub_skip_list);
  1261.             if ( is_wp_error($result) )
  1262.                 return $result;
  1263.         }
  1264.     }
  1265.     return true;
  1266. }
  1267.  
  1268. /**
  1269.  * Redirect to the About WordPress page after a successful upgrade.
  1270.  *
  1271.  * This function is only needed when the existing installation is older than 3.4.0.
  1272.  *
  1273.  * @since 3.3.0
  1274.  *
  1275.  * @global string $wp_version
  1276.  * @global string $pagenow
  1277.  * @global string $action
  1278.  *
  1279.  * @param string $new_version
  1280.  */
  1281. function _redirect_to_about_wordpress( $new_version ) {
  1282.     global $wp_version, $pagenow, $action;
  1283.  
  1284.     if ( version_compare( $wp_version, '3.4-RC1', '>=' ) )
  1285.         return;
  1286.  
  1287.     // Ensure we only run this on the update-core.php page. The Core_Upgrader may be used in other contexts.
  1288.     if ( 'update-core.php' != $pagenow )
  1289.         return;
  1290.  
  1291.      if ( 'do-core-upgrade' != $action && 'do-core-reinstall' != $action )
  1292.          return;
  1293.  
  1294.     // Load the updated default text localization domain for new strings.
  1295.     load_default_textdomain();
  1296.  
  1297.     // See do_core_upgrade()
  1298.     show_message( __('WordPress updated successfully') );
  1299.  
  1300.     // self_admin_url() won't exist when upgrading from <= 3.0, so relative URLs are intentional.
  1301.     show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
  1302.     show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
  1303.     echo '</div>';
  1304.     ?>
  1305. <script type="text/javascript">
  1306. window.location = 'about.php?updated';
  1307. </script>
  1308.     <?php
  1309.  
  1310.     // Include admin-footer.php and exit.
  1311.     include(ABSPATH . 'wp-admin/admin-footer.php');
  1312.     exit();
  1313. }
  1314.  
  1315. /**
  1316.  * Cleans up Genericons example files.
  1317.  *
  1318.  * @since 4.2.2
  1319.  *
  1320.  * @global array              $wp_theme_directories
  1321.  * @global WP_Filesystem_Base $wp_filesystem
  1322.  */
  1323. function _upgrade_422_remove_genericons() {
  1324.     global $wp_theme_directories, $wp_filesystem;
  1325.  
  1326.     // A list of the affected files using the filesystem absolute paths.
  1327.     $affected_files = array();
  1328.  
  1329.     // Themes
  1330.     foreach ( $wp_theme_directories as $directory ) {
  1331.         $affected_theme_files = _upgrade_422_find_genericons_files_in_folder( $directory );
  1332.         $affected_files       = array_merge( $affected_files, $affected_theme_files );
  1333.     }
  1334.  
  1335.     // Plugins
  1336.     $affected_plugin_files = _upgrade_422_find_genericons_files_in_folder( WP_PLUGIN_DIR );
  1337.     $affected_files        = array_merge( $affected_files, $affected_plugin_files );
  1338.  
  1339.     foreach ( $affected_files as $file ) {
  1340.         $gen_dir = $wp_filesystem->find_folder( trailingslashit( dirname( $file ) ) );
  1341.         if ( empty( $gen_dir ) ) {
  1342.             continue;
  1343.         }
  1344.  
  1345.         // The path when the file is accessed via WP_Filesystem may differ in the case of FTP
  1346.         $remote_file = $gen_dir . basename( $file );
  1347.  
  1348.         if ( ! $wp_filesystem->exists( $remote_file ) ) {
  1349.             continue;
  1350.         }
  1351.  
  1352.         if ( ! $wp_filesystem->delete( $remote_file, false, 'f' ) ) {
  1353.             $wp_filesystem->put_contents( $remote_file, '' );
  1354.         }
  1355.     }
  1356. }
  1357.  
  1358. /**
  1359.  * Recursively find Genericons example files in a given folder.
  1360.  *
  1361.  * @ignore
  1362.  * @since 4.2.2
  1363.  *
  1364.  * @param string $directory Directory path. Expects trailingslashed.
  1365.  * @return array
  1366.  */
  1367. function _upgrade_422_find_genericons_files_in_folder( $directory ) {
  1368.     $directory = trailingslashit( $directory );
  1369.     $files     = array();
  1370.  
  1371.     if ( file_exists( "{$directory}example.html" ) && false !== strpos( file_get_contents( "{$directory}example.html" ), '<title>Genericons</title>' ) ) {
  1372.         $files[] = "{$directory}example.html";
  1373.     }
  1374.  
  1375.     $dirs = glob( $directory . '*', GLOB_ONLYDIR );
  1376.     if ( $dirs ) {
  1377.         foreach ( $dirs as $dir ) {
  1378.             $files = array_merge( $files, _upgrade_422_find_genericons_files_in_folder( $dir ) );
  1379.         }
  1380.     }
  1381.  
  1382.     return $files;
  1383. }
  1384.  
  1385. /**
  1386.  * @ignore
  1387.  * @since 4.4.0
  1388.  */
  1389. function _upgrade_440_force_deactivate_incompatible_plugins() {
  1390.     if ( defined( 'REST_API_VERSION' ) && version_compare( REST_API_VERSION, '2.0-beta4', '<=' ) ) {
  1391.         deactivate_plugins( array( 'rest-api/plugin.php' ), true );
  1392.     }
  1393. }
  1394.