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 'wp-admin/css/media-rtl.min.css',
 602 'wp-admin/css/media.min.css',
 603 'wp-admin/css/farbtastic-rtl.min.css',
 604 'wp-admin/images/lock-2x.png',
 605 'wp-admin/images/lock.png',
 606 'wp-admin/js/theme-preview.js',
 607 'wp-admin/js/theme-install.min.js',
 608 'wp-admin/js/theme-install.js',
 609 'wp-admin/js/theme-preview.min.js',
 610 'wp-includes/js/plupload/plupload.html4.js',
 611 'wp-includes/js/plupload/plupload.html5.js',
 612 'wp-includes/js/plupload/changelog.txt',
 613 'wp-includes/js/plupload/plupload.silverlight.js',
 614 'wp-includes/js/plupload/plupload.flash.js',
 615 'wp-includes/js/plupload/plupload.js',
 616 'wp-includes/js/tinymce/plugins/spellchecker',
 617 'wp-includes/js/tinymce/plugins/inlinepopups',
 618 'wp-includes/js/tinymce/plugins/media/js',
 619 'wp-includes/js/tinymce/plugins/media/css',
 620 'wp-includes/js/tinymce/plugins/wordpress/img',
 621 'wp-includes/js/tinymce/plugins/wpdialogs/js',
 622 'wp-includes/js/tinymce/plugins/wpeditimage/img',
 623 'wp-includes/js/tinymce/plugins/wpeditimage/js',
 624 'wp-includes/js/tinymce/plugins/wpeditimage/css',
 625 'wp-includes/js/tinymce/plugins/wpgallery/img',
 626 'wp-includes/js/tinymce/plugins/wpfullscreen/css',
 627 'wp-includes/js/tinymce/plugins/paste/js',
 628 'wp-includes/js/tinymce/themes/advanced',
 629 'wp-includes/js/tinymce/tiny_mce.js',
 630 'wp-includes/js/tinymce/mark_loaded_src.js',
 631 'wp-includes/js/tinymce/wp-tinymce-schema.js',
 632 'wp-includes/js/tinymce/plugins/media/editor_plugin.js',
 633 'wp-includes/js/tinymce/plugins/media/editor_plugin_src.js',
 634 'wp-includes/js/tinymce/plugins/media/media.htm',
 635 'wp-includes/js/tinymce/plugins/wpview/editor_plugin_src.js',
 636 'wp-includes/js/tinymce/plugins/wpview/editor_plugin.js',
 637 'wp-includes/js/tinymce/plugins/directionality/editor_plugin.js',
 638 'wp-includes/js/tinymce/plugins/directionality/editor_plugin_src.js',
 639 'wp-includes/js/tinymce/plugins/wordpress/editor_plugin.js',
 640 'wp-includes/js/tinymce/plugins/wordpress/editor_plugin_src.js',
 641 'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin_src.js',
 642 'wp-includes/js/tinymce/plugins/wpdialogs/editor_plugin.js',
 643 'wp-includes/js/tinymce/plugins/wpeditimage/editimage.html',
 644 'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin.js',
 645 'wp-includes/js/tinymce/plugins/wpeditimage/editor_plugin_src.js',
 646 'wp-includes/js/tinymce/plugins/fullscreen/editor_plugin_src.js',
 647 'wp-includes/js/tinymce/plugins/fullscreen/fullscreen.htm',
 648 'wp-includes/js/tinymce/plugins/fullscreen/editor_plugin.js',
 649 'wp-includes/js/tinymce/plugins/wplink/editor_plugin_src.js',
 650 'wp-includes/js/tinymce/plugins/wplink/editor_plugin.js',
 651 'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin_src.js',
 652 'wp-includes/js/tinymce/plugins/wpgallery/editor_plugin.js',
 653 'wp-includes/js/tinymce/plugins/tabfocus/editor_plugin.js',
 654 'wp-includes/js/tinymce/plugins/tabfocus/editor_plugin_src.js',
 655 'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin.js',
 656 'wp-includes/js/tinymce/plugins/wpfullscreen/editor_plugin_src.js',
 657 'wp-includes/js/tinymce/plugins/paste/editor_plugin.js',
 658 'wp-includes/js/tinymce/plugins/paste/pasteword.htm',
 659 'wp-includes/js/tinymce/plugins/paste/editor_plugin_src.js',
 660 'wp-includes/js/tinymce/plugins/paste/pastetext.htm',
 661 'wp-includes/js/tinymce/langs/wp-langs.php',
 662 // 4.1
 663 'wp-includes/js/jquery/ui/jquery.ui.accordion.min.js',
 664 'wp-includes/js/jquery/ui/jquery.ui.autocomplete.min.js',
 665 'wp-includes/js/jquery/ui/jquery.ui.button.min.js',
 666 'wp-includes/js/jquery/ui/jquery.ui.core.min.js',
 667 'wp-includes/js/jquery/ui/jquery.ui.datepicker.min.js',
 668 'wp-includes/js/jquery/ui/jquery.ui.dialog.min.js',
 669 'wp-includes/js/jquery/ui/jquery.ui.draggable.min.js',
 670 'wp-includes/js/jquery/ui/jquery.ui.droppable.min.js',
 671 'wp-includes/js/jquery/ui/jquery.ui.effect-blind.min.js',
 672 'wp-includes/js/jquery/ui/jquery.ui.effect-bounce.min.js',
 673 'wp-includes/js/jquery/ui/jquery.ui.effect-clip.min.js',
 674 'wp-includes/js/jquery/ui/jquery.ui.effect-drop.min.js',
 675 'wp-includes/js/jquery/ui/jquery.ui.effect-explode.min.js',
 676 'wp-includes/js/jquery/ui/jquery.ui.effect-fade.min.js',
 677 'wp-includes/js/jquery/ui/jquery.ui.effect-fold.min.js',
 678 'wp-includes/js/jquery/ui/jquery.ui.effect-highlight.min.js',
 679 'wp-includes/js/jquery/ui/jquery.ui.effect-pulsate.min.js',
 680 'wp-includes/js/jquery/ui/jquery.ui.effect-scale.min.js',
 681 'wp-includes/js/jquery/ui/jquery.ui.effect-shake.min.js',
 682 'wp-includes/js/jquery/ui/jquery.ui.effect-slide.min.js',
 683 'wp-includes/js/jquery/ui/jquery.ui.effect-transfer.min.js',
 684 'wp-includes/js/jquery/ui/jquery.ui.effect.min.js',
 685 'wp-includes/js/jquery/ui/jquery.ui.menu.min.js',
 686 'wp-includes/js/jquery/ui/jquery.ui.mouse.min.js',
 687 'wp-includes/js/jquery/ui/jquery.ui.position.min.js',
 688 'wp-includes/js/jquery/ui/jquery.ui.progressbar.min.js',
 689 'wp-includes/js/jquery/ui/jquery.ui.resizable.min.js',
 690 'wp-includes/js/jquery/ui/jquery.ui.selectable.min.js',
 691 'wp-includes/js/jquery/ui/jquery.ui.slider.min.js',
 692 'wp-includes/js/jquery/ui/jquery.ui.sortable.min.js',
 693 'wp-includes/js/jquery/ui/jquery.ui.spinner.min.js',
 694 'wp-includes/js/jquery/ui/jquery.ui.tabs.min.js',
 695 'wp-includes/js/jquery/ui/jquery.ui.tooltip.min.js',
 696 'wp-includes/js/jquery/ui/jquery.ui.widget.min.js',
 697 );
 698
 699 /**
 700  * Stores new files in wp-content to copy
 701  *
 702  * The contents of this array indicate any new bundled plugins/themes which
 703  * should be installed with the WordPress Upgrade. These items will not be
 704  * re-installed in future upgrades, this behaviour is controlled by the
 705  * introduced version present here being older than the current installed version.
 706  *
 707  * The content of this array should follow the following format:
 708  * Filename (relative to wp-content) => Introduced version
 709  * Directories should be noted by suffixing it with a trailing slash (/)
 710  *
 711  * @since 3.2.0
 712  * @global array $_new_bundled_files
 713  * @var array
 714  * @name $_new_bundled_files
 715  */
 716 global $_new_bundled_files;
 717
 718 $_new_bundled_files = array(
 719         'plugins/akismet/'       => '2.0',
 720         'themes/twentyten/'      => '3.0',
 721         'themes/twentyeleven/'   => '3.2',
 722         'themes/twentytwelve/'   => '3.5',
 723         'themes/twentythirteen/' => '3.6',
 724         'themes/twentyfourteen/' => '3.8',
 725         'themes/twentyfifteen/'  => '4.1',
 726 );
 727
 728 /**
 729  * Upgrade the core of WordPress.
 730  *
 731  * This will create a .maintenance file at the base of the WordPress directory
 732  * to ensure that people can not access the web site, when the files are being
 733  * copied to their locations.
 734  *
 735  * The files in the {@link $_old_files} list will be removed and the new files
 736  * copied from the zip file after the database is upgraded.
 737  *
 738  * The files in the {@link $_new_bundled_files} list will be added to the installation
 739  * if the version is greater than or equal to the old version being upgraded.
 740  *
 741  * The steps for the upgrader for after the new release is downloaded and
 742  * unzipped is:
 743  *   1. Test unzipped location for select files to ensure that unzipped worked.
 744  *   2. Create the .maintenance file in current WordPress base.
 745  *   3. Copy new WordPress directory over old WordPress files.
 746  *   4. Upgrade WordPress to new version.
 747  *     4.1. Copy all files/folders other than wp-content
 748  *     4.2. Copy any language files to WP_LANG_DIR (which may differ from WP_CONTENT_DIR
 749  *     4.3. Copy any new bundled themes/plugins to their respective locations
 750  *   5. Delete new WordPress directory path.
 751  *   6. Delete .maintenance file.
 752  *   7. Remove old files.
 753  *   8. Delete 'update_core' option.
 754  *
 755  * There are several areas of failure. For instance if PHP times out before step
 756  * 6, then you will not be able to access any portion of your site. Also, since
 757  * the upgrade will not continue where it left off, you will not be able to
 758  * automatically remove old files and remove the 'update_core' option. This
 759  * isn't that bad.
 760  *
 761  * If the copy of the new WordPress over the old fails, then the worse is that
 762  * the new WordPress directory will remain.
 763  *
 764  * If it is assumed that every file will be copied over, including plugins and
 765  * themes, then if you edit the default theme, you should rename it, so that
 766  * your changes remain.
 767  *
 768  * @since 2.7.0
 769  *
 770  * @param string $from New release unzipped path.
 771  * @param string $to Path to old WordPress installation.
 772  * @return WP_Error|null WP_Error on failure, null on success.
 773  */
 774 function update_core($from, $to) {
 775         global $wp_filesystem, $_old_files, $_new_bundled_files, $wpdb;
 776
 777         @set_time_limit( 300 );
 778
 779         /**
 780          * Filter feedback messages displayed during the core update process.
 781          *
 782          * The filter is first evaluated after the zip file for the latest version
 783          * has been downloaded and unzipped. It is evaluated five more times during
 784          * the process:
 785          *
 786          * 1. Before WordPress begins the core upgrade process.
 787          * 2. Before Maintenance Mode is enabled.
 788          * 3. Before WordPress begins copying over the necessary files.
 789          * 4. Before Maintenance Mode is disabled.
 790          * 5. Before the database is upgraded.
 791          *
 792          * @since 2.5.0
 793          *
 794          * @param string $feedback The core update feedback messages.
 795          */
 796         apply_filters( 'update_feedback', __( 'Verifying the unpacked files&#8230;' ) );
 797
 798         // Sanity check the unzipped distribution.
 799         $distro = '';
 800         $roots = array( '/wordpress/', '/wordpress-mu/' );
 801         foreach ( $roots as $root ) {
 802                 if ( $wp_filesystem->exists( $from . $root . 'readme.html' ) && $wp_filesystem->exists( $from . $root . 'wp-includes/version.php' ) ) {
 803                         $distro = $root;
 804                         break;
 805                 }
 806         }
 807         if ( ! $distro ) {
 808                 $wp_filesystem->delete( $from, true );
 809                 return new WP_Error( 'insane_distro', __('The update could not be unpacked') );
 810         }
 811
 812         // Import $wp_version, $required_php_version, and $required_mysql_version from the new version
 813         // $wp_filesystem->wp_content_dir() returned unslashed pre-2.8
 814         $versions_file = trailingslashit( $wp_filesystem->wp_content_dir() ) . 'upgrade/version-current.php';
 815         if ( ! $wp_filesystem->copy( $from . $distro . 'wp-includes/version.php', $versions_file ) ) {
 816                 $wp_filesystem->delete( $from, true );
 817                 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' );
 818         }
 819
 820         $wp_filesystem->chmod( $versions_file, FS_CHMOD_FILE );
 821         require( WP_CONTENT_DIR . '/upgrade/version-current.php' );
 822         $wp_filesystem->delete( $versions_file );
 823
 824         $php_version    = phpversion();
 825         $mysql_version  = $wpdb->db_version();
 826         $old_wp_version = $GLOBALS['wp_version']; // The version of WordPress we're updating from
 827         $development_build = ( false !== strpos( $old_wp_version . $wp_version, '-' )  ); // a dash in the version indicates a Development release
 828         $php_compat     = version_compare( $php_version, $required_php_version, '>=' );
 829         if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
 830                 $mysql_compat = true;
 831         else
 832                 $mysql_compat = version_compare( $mysql_version, $required_mysql_version, '>=' );
 833
 834         if ( !$mysql_compat || !$php_compat )
 835                 $wp_filesystem->delete($from, true);
 836
 837         if ( !$mysql_compat && !$php_compat )
 838                 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, $mysql_version ) );
 839         elseif ( !$php_compat )
 840                 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, $php_version ) );
 841         elseif ( !$mysql_compat )
 842                 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 ) );
 843
 844         /** This filter is documented in wp-admin/includes/update-core.php */
 845         apply_filters( 'update_feedback', __( 'Preparing to install the latest version&#8230;' ) );
 846
 847         // Don't copy wp-content, we'll deal with that below
 848         // We also copy version.php last so failed updates report their old version
 849         $skip = array( 'wp-content', 'wp-includes/version.php' );
 850         $check_is_writable = array();
 851
 852         // Check to see which files don't really need updating - only available for 3.7 and higher
 853         if ( function_exists( 'get_core_checksums' ) ) {
 854                 // Find the local version of the working directory
 855                 $working_dir_local = WP_CONTENT_DIR . '/upgrade/' . basename( $from ) . $distro;
 856
 857                 $checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
 858                 if ( is_array( $checksums ) && isset( $checksums[ $wp_version ] ) )
 859                         $checksums = $checksums[ $wp_version ]; // Compat code for 3.7-beta2
 860                 if ( is_array( $checksums ) ) {
 861                         foreach( $checksums as $file => $checksum ) {
 862                                 if ( 'wp-content' == substr( $file, 0, 10 ) )
 863                                         continue;
 864                                 if ( ! file_exists( ABSPATH . $file ) )
 865                                         continue;
 866                                 if ( ! file_exists( $working_dir_local . $file ) )
 867                                         continue;
 868                                 if ( md5_file( ABSPATH . $file ) === $checksum )
 869                                         $skip[] = $file;
 870                                 else
 871                                         $check_is_writable[ $file ] = ABSPATH . $file;
 872                         }
 873                 }
 874         }
 875
 876         // If we're using the direct method, we can predict write failures that are due to permissions.
 877         if ( $check_is_writable && 'direct' === $wp_filesystem->method ) {
 878                 $files_writable = array_filter( $check_is_writable, array( $wp_filesystem, 'is_writable' ) );
 879                 if ( $files_writable !== $check_is_writable ) {
 880                         $files_not_writable = array_diff_key( $check_is_writable, $files_writable );
 881                         foreach ( $files_not_writable as $relative_file_not_writable => $file_not_writable ) {
 882                                 // If the writable check failed, chmod file to 0644 and try again, same as copy_dir().
 883                                 $wp_filesystem->chmod( $file_not_writable, FS_CHMOD_FILE );
 884                                 if ( $wp_filesystem->is_writable( $file_not_writable ) )
 885                                         unset( $files_not_writable[ $relative_file_not_writable ] );
 886                         }
 887
 888                         // Store package-relative paths (the key) of non-writable files in the WP_Error object.
 889                         $error_data = version_compare( $old_wp_version, '3.7-beta2', '>' ) ? array_keys( $files_not_writable ) : '';
 890
 891                         if ( $files_not_writable )
 892                                 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 ) );
 893                 }
 894         }
 895
 896         /** This filter is documented in wp-admin/includes/update-core.php */
 897         apply_filters( 'update_feedback', __( 'Enabling Maintenance mode&#8230;' ) );
 898         // Create maintenance file to signal that we are upgrading
 899         $maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
 900         $maintenance_file = $to . '.maintenance';
 901         $wp_filesystem->delete($maintenance_file);
 902         $wp_filesystem->put_contents($maintenance_file, $maintenance_string, FS_CHMOD_FILE);
 903
 904         /** This filter is documented in wp-admin/includes/update-core.php */
 905         apply_filters( 'update_feedback', __( 'Copying the required files&#8230;' ) );
 906         // Copy new versions of WP files into place.
 907         $result = _copy_dir( $from . $distro, $to, $skip );
 908         if ( is_wp_error( $result ) )
 909                 $result = new WP_Error( $result->get_error_code(), $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) );
 910
 911         // Since we know the core files have copied over, we can now copy the version file
 912         if ( ! is_wp_error( $result ) ) {
 913                 if ( ! $wp_filesystem->copy( $from . $distro . 'wp-includes/version.php', $to . 'wp-includes/version.php', true /* overwrite */ ) ) {
 914                         $wp_filesystem->delete( $from, true );
 915                         $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' );
 916                 }
 917                 $wp_filesystem->chmod( $to . 'wp-includes/version.php', FS_CHMOD_FILE );
 918         }
 919
 920         // Check to make sure everything copied correctly, ignoring the contents of wp-content
 921         $skip = array( 'wp-content' );
 922         $failed = array();
 923         if ( isset( $checksums ) && is_array( $checksums ) ) {
 924                 foreach ( $checksums as $file => $checksum ) {
 925                         if ( 'wp-content' == substr( $file, 0, 10 ) )
 926                                 continue;
 927                         if ( ! file_exists( $working_dir_local . $file ) )
 928                                 continue;
 929                         if ( file_exists( ABSPATH . $file ) && md5_file( ABSPATH . $file ) == $checksum )
 930                                 $skip[] = $file;
 931                         else
 932                                 $failed[] = $file;
 933                 }
 934         }
 935
 936         // Some files didn't copy properly
 937         if ( ! empty( $failed ) ) {
 938                 $total_size = 0;
 939                 foreach ( $failed as $file ) {
 940                         if ( file_exists( $working_dir_local . $file ) )
 941                                 $total_size += filesize( $working_dir_local . $file );
 942                 }
 943
 944                 // If we don't have enough free space, it isn't worth trying again.
 945                 // Unlikely to be hit due to the check in unzip_file().
 946                 $available_space = @disk_free_space( ABSPATH );
 947                 if ( $available_space && $total_size >= $available_space ) {
 948                         $result = new WP_Error( 'disk_full', __( 'There is not enough free disk space to complete the update.' ) );
 949                 } else {
 950                         $result = _copy_dir( $from . $distro, $to, $skip );
 951                         if ( is_wp_error( $result ) )
 952                                 $result = new WP_Error( $result->get_error_code() . '_retry', $result->get_error_message(), substr( $result->get_error_data(), strlen( $to ) ) );
 953                 }
 954         }
 955
 956         // Custom Content Directory needs updating now.
 957         // Copy Languages
 958         if ( !is_wp_error($result) && $wp_filesystem->is_dir($from . $distro . 'wp-content/languages') ) {
 959                 if ( WP_LANG_DIR != ABSPATH . WPINC . '/languages' || @is_dir(WP_LANG_DIR) )
 960                         $lang_dir = WP_LANG_DIR;
 961                 else
 962                         $lang_dir = WP_CONTENT_DIR . '/languages';
 963
 964                 if ( !@is_dir($lang_dir) && 0 === strpos($lang_dir, ABSPATH) ) { // Check the language directory exists first
 965                         $wp_filesystem->mkdir($to . str_replace(ABSPATH, '', $lang_dir), FS_CHMOD_DIR); // If it's within the ABSPATH we can handle it here, otherwise they're out of luck.
 966                         clearstatcache(); // for FTP, Need to clear the stat cache
 967                 }
 968
 969                 if ( @is_dir($lang_dir) ) {
 970                         $wp_lang_dir = $wp_filesystem->find_folder($lang_dir);
 971                         if ( $wp_lang_dir ) {
 972                                 $result = copy_dir($from . $distro . 'wp-content/languages/', $wp_lang_dir);
 973                                 if ( is_wp_error( $result ) )
 974                                         $result = new WP_Error( $result->get_error_code() . '_languages', $result->get_error_message(), substr( $result->get_error_data(), strlen( $wp_lang_dir ) ) );
 975                         }
 976                 }
 977         }
 978
 979         /** This filter is documented in wp-admin/includes/update-core.php */
 980         apply_filters( 'update_feedback', __( 'Disabling Maintenance mode&#8230;' ) );
 981         // Remove maintenance file, we're done with potential site-breaking changes
 982         $wp_filesystem->delete( $maintenance_file );
 983
 984         // 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, preventing installation of Twenty Twelve.
 985         if ( '3.5' == $old_wp_version ) {
 986                 if ( is_dir( WP_CONTENT_DIR . '/themes/twentytwelve' ) && ! file_exists( WP_CONTENT_DIR . '/themes/twentytwelve/style.css' )  ) {
 987                         $wp_filesystem->delete( $wp_filesystem->wp_themes_dir() . 'twentytwelve/' );
 988                 }
 989         }
 990
 991         // Copy New bundled plugins & themes
 992         // This gives us the ability to install new plugins & themes bundled with future versions of WordPress whilst avoiding the re-install upon upgrade issue.
 993         // $development_build controls us overwriting bundled themes and plugins when a non-stable release is being updated
 994         if ( !is_wp_error($result) && ( ! defined('CORE_UPGRADE_SKIP_NEW_BUNDLED') || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) ) {
 995                 foreach ( (array) $_new_bundled_files as $file => $introduced_version ) {
 996                         // If a $development_build or if $introduced version is greater than what the site was previously running
 997                         if ( $development_build || version_compare( $introduced_version, $old_wp_version, '>' ) ) {
 998                                 $directory = ('/' == $file[ strlen($file)-1 ]);
 999                                 list($type, $filename) = explode('/', $file, 2);
1000
1001                                 // Check to see if the bundled items exist before attempting to copy them
1002                                 if ( ! $wp_filesystem->exists( $from . $distro . 'wp-content/' . $file ) )
1003                                         continue;
1004
1005                                 if ( 'plugins' == $type )
1006                                         $dest = $wp_filesystem->wp_plugins_dir();
1007                                 elseif ( 'themes' == $type )
1008                                         $dest = trailingslashit($wp_filesystem->wp_themes_dir()); // Back-compat, ::wp_themes_dir() did not return trailingslash'd pre-3.2
1009                                 else
1010                                         continue;
1011
1012                                 if ( ! $directory ) {
1013                                         if ( ! $development_build && $wp_filesystem->exists( $dest . $filename ) )
1014                                                 continue;
1015
1016                                         if ( ! $wp_filesystem->copy($from . $distro . 'wp-content/' . $file, $dest . $filename, FS_CHMOD_FILE) )
1017                                                 $result = new WP_Error( "copy_failed_for_new_bundled_$type", __( 'Could not copy file.' ), $dest . $filename );
1018                                 } else {
1019                                         if ( ! $development_build && $wp_filesystem->is_dir( $dest . $filename ) )
1020                                                 continue;
1021
1022                                         $wp_filesystem->mkdir($dest . $filename, FS_CHMOD_DIR);
1023                                         $_result = copy_dir( $from . $distro . 'wp-content/' . $file, $dest . $filename);
1024
1025                                         // If a error occurs partway through this final step, keep the error flowing through, but keep process going.
1026                                         if ( is_wp_error( $_result ) ) {
1027                                                 if ( ! is_wp_error( $result ) )
1028                                                         $result = new WP_Error;
1029                                                 $result->add( $_result->get_error_code() . "_$type", $_result->get_error_message(), substr( $_result->get_error_data(), strlen( $dest ) ) );
1030                                         }
1031                                 }
1032                         }
1033                 } //end foreach
1034         }
1035
1036         // Handle $result error from the above blocks
1037         if ( is_wp_error($result) ) {
1038                 $wp_filesystem->delete($from, true);
1039                 return $result;
1040         }
1041
1042         // Remove old files
1043         foreach ( $_old_files as $old_file ) {
1044                 $old_file = $to . $old_file;
1045                 if ( !$wp_filesystem->exists($old_file) )
1046                         continue;
1047                 $wp_filesystem->delete($old_file, true);
1048         }
1049
1050         // Upgrade DB with separate request
1051         /** This filter is documented in wp-admin/includes/update-core.php */
1052         apply_filters( 'update_feedback', __( 'Upgrading database&#8230;' ) );
1053         $db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
1054         wp_remote_post($db_upgrade_url, array('timeout' => 60));
1055
1056         // Clear the cache to prevent an update_option() from saving a stale db_version to the cache
1057         wp_cache_flush();
1058         // (Not all cache backends listen to 'flush')
1059         wp_cache_delete( 'alloptions', 'options' );
1060
1061         // Remove working directory
1062         $wp_filesystem->delete($from, true);
1063
1064         // Force refresh of update information
1065         if ( function_exists('delete_site_transient') )
1066                 delete_site_transient('update_core');
1067         else
1068                 delete_option('update_core');
1069
1070         /**
1071          * Fires after WordPress core has been successfully updated.
1072          *
1073          * @since 3.3.0
1074          *
1075          * @param string $wp_version The current WordPress version.
1076          */
1077         do_action( '_core_updated_successfully', $wp_version );
1078
1079         // Clear the option that blocks auto updates after failures, now that we've been successful.
1080         if ( function_exists( 'delete_site_option' ) )
1081                 delete_site_option( 'auto_core_update_failed' );
1082
1083         return $wp_version;
1084 }
1085
1086 /**
1087  * Copies a directory from one location to another via the WordPress Filesystem Abstraction.
1088  * Assumes that WP_Filesystem() has already been called and setup.
1089  *
1090  * This is a temporary function for the 3.1 -> 3.2 upgrade, as well as for those upgrading to
1091  * 3.7+
1092  *
1093  * @ignore
1094  * @since 3.2.0
1095  * @since 3.7.0 Updated not to use a regular expression for the skip list
1096  * @see copy_dir()
1097  *
1098  * @param string $from source directory
1099  * @param string $to destination directory
1100  * @param array $skip_list a list of files/folders to skip copying
1101  * @return mixed WP_Error on failure, True on success.
1102  */
1103 function _copy_dir($from, $to, $skip_list = array() ) {
1104         global $wp_filesystem;
1105
1106         $dirlist = $wp_filesystem->dirlist($from);
1107
1108         $from = trailingslashit($from);
1109         $to = trailingslashit($to);
1110
1111         foreach ( (array) $dirlist as $filename => $fileinfo ) {
1112                 if ( in_array( $filename, $skip_list ) )
1113                         continue;
1114
1115                 if ( 'f' == $fileinfo['type'] ) {
1116                         if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) ) {
1117                                 // If copy failed, chmod file to 0644 and try again.
1118                                 $wp_filesystem->chmod( $to . $filename, FS_CHMOD_FILE );
1119                                 if ( ! $wp_filesystem->copy($from . $filename, $to . $filename, true, FS_CHMOD_FILE) )
1120                                         return new WP_Error( 'copy_failed__copy_dir', __( 'Could not copy file.' ), $to . $filename );
1121                         }
1122                 } elseif ( 'd' == $fileinfo['type'] ) {
1123                         if ( !$wp_filesystem->is_dir($to . $filename) ) {
1124                                 if ( !$wp_filesystem->mkdir($to . $filename, FS_CHMOD_DIR) )
1125                                         return new WP_Error( 'mkdir_failed__copy_dir', __( 'Could not create directory.' ), $to . $filename );
1126                         }
1127
1128                         /*
1129                          * Generate the $sub_skip_list for the subdirectory as a sub-set
1130                          * of the existing $skip_list.
1131                          */
1132                         $sub_skip_list = array();
1133                         foreach ( $skip_list as $skip_item ) {
1134                                 if ( 0 === strpos( $skip_item, $filename . '/' ) )
1135                                         $sub_skip_list[] = preg_replace( '!^' . preg_quote( $filename, '!' ) . '/!i', '', $skip_item );
1136                         }
1137
1138                         $result = _copy_dir($from . $filename, $to . $filename, $sub_skip_list);
1139                         if ( is_wp_error($result) )
1140                                 return $result;
1141                 }
1142         }
1143         return true;
1144 }
1145
1146 /**
1147  * Redirect to the About WordPress page after a successful upgrade.
1148  *
1149  * This function is only needed when the existing install is older than 3.4.0.
1150  *
1151  * @since 3.3.0
1152  *
1153  */
1154 function _redirect_to_about_wordpress( $new_version ) {
1155         global $wp_version, $pagenow, $action;
1156
1157         if ( version_compare( $wp_version, '3.4-RC1', '>=' ) )
1158                 return;
1159
1160         // Ensure we only run this on the update-core.php page. The Core_Upgrader may be used in other contexts.
1161         if ( 'update-core.php' != $pagenow )
1162                 return;
1163
1164         if ( 'do-core-upgrade' != $action && 'do-core-reinstall' != $action )
1165                 return;
1166
1167         // Load the updated default text localization domain for new strings.
1168         load_default_textdomain();
1169
1170         // See do_core_upgrade()
1171         show_message( __('WordPress updated successfully') );
1172
1173         // self_admin_url() won't exist when upgrading from <= 3.0, so relative URLs are intentional.
1174         show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
1175         show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
1176         echo '</div>';
1177         ?>
1178 <script type="text/javascript">
1179 window.location = 'about.php?updated';
1180 </script>
1181         <?php
1182
1183         // Include admin-footer.php and exit.
1184         include(ABSPATH . 'wp-admin/admin-footer.php');
1185         exit();
1186 }
1187 add_action( '_core_updated_successfully', '_redirect_to_about_wordpress' );