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

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