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/wp-admin/update-core.php

https://gitlab.com/dinhkk/Pinotage
PHP | 661 lines | 520 code | 94 blank | 47 comment | 139 complexity | 75c977ae43d7215f48fa3b44c080ab81 MD5 | raw file
  1<?php
  2/**
  3 * Update Core administration panel.
  4 *
  5 * @package WordPress
  6 * @subpackage Administration
  7 */
  8
  9/** WordPress Administration Bootstrap */
 10require_once( dirname( __FILE__ ) . '/admin.php' );
 11
 12wp_enqueue_style( 'plugin-install' );
 13wp_enqueue_script( 'plugin-install' );
 14wp_enqueue_script( 'updates' );
 15add_thickbox();
 16
 17if ( is_multisite() && ! is_network_admin() ) {
 18	wp_redirect( network_admin_url( 'update-core.php' ) );
 19	exit();
 20}
 21
 22if ( ! current_user_can( 'update_core' ) && ! current_user_can( 'update_themes' ) && ! current_user_can( 'update_plugins' ) )
 23	wp_die( __( 'You do not have sufficient permissions to update this site.' ) );
 24
 25function list_core_update( $update ) {
 26 	global $wp_local_package, $wpdb, $wp_version;
 27  	static $first_pass = true;
 28
 29 	if ( 'en_US' == $update->locale && 'en_US' == get_locale() )
 30 		$version_string = $update->current;
 31 	// If the only available update is a partial builds, it doesn't need a language-specific version string.
 32 	elseif ( 'en_US' == $update->locale && $update->packages->partial && $wp_version == $update->partial_version && ( $updates = get_core_updates() ) && 1 == count( $updates ) )
 33 		$version_string = $update->current;
 34 	else
 35 		$version_string = sprintf( "%s&ndash;<strong>%s</strong>", $update->current, $update->locale );
 36
 37	$current = false;
 38	if ( !isset($update->response) || 'latest' == $update->response )
 39		$current = true;
 40	$submit = __('Update Now');
 41	$form_action = 'update-core.php?action=do-core-upgrade';
 42	$php_version    = phpversion();
 43	$mysql_version  = $wpdb->db_version();
 44	$show_buttons = true;
 45	if ( 'development' == $update->response ) {
 46		$message = __('You are using a development version of WordPress. You can update to the latest nightly build automatically or download the nightly build and install it manually:');
 47		$download = __('Download nightly build');
 48	} else {
 49		if ( $current ) {
 50			$message = sprintf( __( 'If you need to re-install version %s, you can do so here or download the package and re-install manually:' ), $version_string );
 51			$submit = __('Re-install Now');
 52			$form_action = 'update-core.php?action=do-core-reinstall';
 53		} else {
 54			$php_compat     = version_compare( $php_version, $update->php_version, '>=' );
 55			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
 56				$mysql_compat = true;
 57			else
 58				$mysql_compat = version_compare( $mysql_version, $update->mysql_version, '>=' );
 59
 60			if ( !$mysql_compat && !$php_compat )
 61				$message = sprintf( __('You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher and MySQL version %3$s or higher. You are running PHP version %4$s and MySQL version %5$s.'), $update->current, $update->php_version, $update->mysql_version, $php_version, $mysql_version );
 62			elseif ( !$php_compat )
 63				$message = sprintf( __('You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires PHP version %2$s or higher. You are running version %3$s.'), $update->current, $update->php_version, $php_version );
 64			elseif ( !$mysql_compat )
 65				$message = sprintf( __('You cannot update because <a href="https://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> requires MySQL version %2$s or higher. You are running version %3$s.'), $update->current, $update->mysql_version, $mysql_version );
 66			else
 67				$message = 	sprintf(__('You can update to <a href="https://codex.wordpress.org/Version_%1$s">WordPress %2$s</a> automatically or download the package and install it manually:'), $update->current, $version_string);
 68			if ( !$mysql_compat || !$php_compat )
 69				$show_buttons = false;
 70		}
 71		$download = sprintf(__('Download %s'), $version_string);
 72	}
 73
 74	echo '<p>';
 75	echo $message;
 76	echo '</p>';
 77	echo '<form method="post" action="' . $form_action . '" name="upgrade" class="upgrade">';
 78	wp_nonce_field('upgrade-core');
 79	echo '<p>';
 80	echo '<input name="version" value="'. esc_attr($update->current) .'" type="hidden"/>';
 81	echo '<input name="locale" value="'. esc_attr($update->locale) .'" type="hidden"/>';
 82	if ( $show_buttons ) {
 83		if ( $first_pass ) {
 84			submit_button( $submit, $current ? 'button' : 'primary regular', 'upgrade', false );
 85			$first_pass = false;
 86		} else {
 87			submit_button( $submit, 'button', 'upgrade', false );
 88		}
 89		echo '&nbsp;<a href="' . esc_url( $update->download ) . '" class="button">' . $download . '</a>&nbsp;';
 90	}
 91	if ( 'en_US' != $update->locale )
 92		if ( !isset( $update->dismissed ) || !$update->dismissed )
 93			submit_button( __('Hide this update'), 'button', 'dismiss', false );
 94		else
 95			submit_button( __('Bring back this update'), 'button', 'undismiss', false );
 96	echo '</p>';
 97	if ( 'en_US' != $update->locale && ( !isset($wp_local_package) || $wp_local_package != $update->locale ) )
 98	    echo '<p class="hint">'.__('This localized version contains both the translation and various other localization fixes. You can skip upgrading if you want to keep your current translation.').'</p>';
 99	// Partial builds don't need language-specific warnings.
100	elseif ( 'en_US' == $update->locale && get_locale() != 'en_US' && ( ! $update->packages->partial && $wp_version == $update->partial_version ) ) {
101	    echo '<p class="hint">'.sprintf( __('You are about to install WordPress %s <strong>in English (US).</strong> There is a chance this update will break your translation. You may prefer to wait for the localized version to be released.'), $update->response != 'development' ? $update->current : '' ).'</p>';
102	}
103	echo '</form>';
104
105}
106
107function dismissed_updates() {
108	$dismissed = get_core_updates( array( 'dismissed' => true, 'available' => false ) );
109	if ( $dismissed ) {
110
111		$show_text = esc_js(__('Show hidden updates'));
112		$hide_text = esc_js(__('Hide hidden updates'));
113	?>
114	<script type="text/javascript">
115
116		jQuery(function($) {
117			$('dismissed-updates').show();
118			$('#show-dismissed').toggle(function(){$(this).text('<?php echo $hide_text; ?>');}, function() {$(this).text('<?php echo $show_text; ?>')});
119			$('#show-dismissed').click(function() { $('#dismissed-updates').toggle('slow');});
120		});
121	</script>
122	<?php
123		echo '<p class="hide-if-no-js"><a id="show-dismissed" href="#">'.__('Show hidden updates').'</a></p>';
124		echo '<ul id="dismissed-updates" class="core-updates dismissed">';
125		foreach( (array) $dismissed as $update) {
126			echo '<li>';
127			list_core_update( $update );
128			echo '</li>';
129		}
130		echo '</ul>';
131	}
132}
133
134/**
135 * Display upgrade WordPress for downloading latest or upgrading automatically form.
136 *
137 * @since 2.7.0
138 *
139 * @return null
140 */
141function core_upgrade_preamble() {
142	global $wp_version, $required_php_version, $required_mysql_version;
143
144	$updates = get_core_updates();
145
146	if ( !isset($updates[0]->response) || 'latest' == $updates[0]->response ) {
147		echo '<h3>';
148		_e('You have the latest version of WordPress.');
149
150		if ( wp_http_supports( array( 'ssl' ) ) ) {
151			require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
152			$upgrader = new WP_Automatic_Updater;
153			$future_minor_update = (object) array(
154				'current'       => $wp_version . '.1.next.minor',
155				'version'       => $wp_version . '.1.next.minor',
156				'php_version'   => $required_php_version,
157				'mysql_version' => $required_mysql_version,
158			);
159			$should_auto_update = $upgrader->should_update( 'core', $future_minor_update, ABSPATH );
160			if ( $should_auto_update )
161				echo ' ' . __( 'Future security updates will be applied automatically.' );
162		}
163		echo '</h3>';
164	} else {
165		echo '<div class="updated inline"><p>';
166		_e('<strong>Important:</strong> before updating, please <a href="https://codex.wordpress.org/WordPress_Backups">back up your database and files</a>. For help with updates, visit the <a href="https://codex.wordpress.org/Updating_WordPress">Updating WordPress</a> Codex page.');
167		echo '</p></div>';
168
169		echo '<h3 class="response">';
170		_e( 'An updated version of WordPress is available.' );
171		echo '</h3>';
172	}
173
174	if ( isset( $updates[0] ) && $updates[0]->response == 'development' ) {
175		require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
176		$upgrader = new WP_Automatic_Updater;
177		if ( wp_http_supports( 'ssl' ) && $upgrader->should_update( 'core', $updates[0], ABSPATH ) ) {
178			echo '<div class="updated inline"><p>';
179			echo '<strong>' . __( 'BETA TESTERS:' ) . '</strong> ' . __( 'This site is set up to install updates of future beta versions automatically.' );
180			echo '</p></div>';
181		}
182	}
183
184	echo '<ul class="core-updates">';
185	foreach( (array) $updates as $update ) {
186		echo '<li>';
187		list_core_update( $update );
188		echo '</li>';
189	}
190	echo '</ul>';
191	// Don't show the maintenance mode notice when we are only showing a single re-install option.
192	if ( $updates && ( count( $updates ) > 1 || $updates[0]->response != 'latest' ) ) {
193		echo '<p>' . __( 'While your site is being updated, it will be in maintenance mode. As soon as your updates are complete, your site will return to normal.' ) . '</p>';
194	} elseif ( ! $updates ) {
195		list( $normalized_version ) = explode( '-', $wp_version );
196		echo '<p>' . sprintf( __( '<a href="%s">Learn more about WordPress %s</a>.' ), esc_url( self_admin_url( 'about.php' ) ), $normalized_version ) . '</p>';
197	}
198	dismissed_updates();
199}
200
201function list_plugin_updates() {
202	global $wp_version;
203
204	$cur_wp_version = preg_replace('/-.*$/', '', $wp_version);
205
206	require_once(ABSPATH . 'wp-admin/includes/plugin-install.php');
207	$plugins = get_plugin_updates();
208	if ( empty( $plugins ) ) {
209		echo '<h3>' . __( 'Plugins' ) . '</h3>';
210		echo '<p>' . __( 'Your plugins are all up to date.' ) . '</p>';
211		return;
212	}
213	$form_action = 'update-core.php?action=do-plugin-upgrade';
214
215	$core_updates = get_core_updates();
216	if ( !isset($core_updates[0]->response) || 'latest' == $core_updates[0]->response || 'development' == $core_updates[0]->response || version_compare( $core_updates[0]->current, $cur_wp_version, '=') )
217		$core_update_version = false;
218	else
219		$core_update_version = $core_updates[0]->current;
220	?>
221<h3><?php _e( 'Plugins' ); ?></h3>
222<p><?php _e( 'The following plugins have new versions available. Check the ones you want to update and then click &#8220;Update Plugins&#8221;.' ); ?></p>
223<form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-plugins" class="upgrade">
224<?php wp_nonce_field('upgrade-core'); ?>
225<p><input id="upgrade-plugins" class="button" type="submit" value="<?php esc_attr_e('Update Plugins'); ?>" name="upgrade" /></p>
226<table class="widefat" id="update-plugins-table">
227	<thead>
228	<tr>
229		<th scope="col" class="manage-column check-column"><input type="checkbox" id="plugins-select-all" /></th>
230		<th scope="col" class="manage-column"><label for="plugins-select-all"><?php _e('Select All'); ?></label></th>
231	</tr>
232	</thead>
233
234	<tbody class="plugins">
235<?php
236	foreach ( (array) $plugins as $plugin_file => $plugin_data) {
237		$info = plugins_api('plugin_information', array('slug' => $plugin_data->update->slug ));
238		if ( is_wp_error( $info ) ) {
239			$info = false;
240		}
241
242		// Get plugin compat for running version of WordPress.
243		if ( isset($info->tested) && version_compare($info->tested, $cur_wp_version, '>=') ) {
244			$compat = '<br />' . sprintf(__('Compatibility with WordPress %1$s: 100%% (according to its author)'), $cur_wp_version);
245		} elseif ( isset($info->compatibility[$cur_wp_version][$plugin_data->update->new_version]) ) {
246			$compat = $info->compatibility[$cur_wp_version][$plugin_data->update->new_version];
247			$compat = '<br />' . sprintf(__('Compatibility with WordPress %1$s: %2$d%% (%3$d "works" votes out of %4$d total)'), $cur_wp_version, $compat[0], $compat[2], $compat[1]);
248		} else {
249			$compat = '<br />' . sprintf(__('Compatibility with WordPress %1$s: Unknown'), $cur_wp_version);
250		}
251		// Get plugin compat for updated version of WordPress.
252		if ( $core_update_version ) {
253			if ( isset($info->compatibility[$core_update_version][$plugin_data->update->new_version]) ) {
254				$update_compat = $info->compatibility[$core_update_version][$plugin_data->update->new_version];
255				$compat .= '<br />' . sprintf(__('Compatibility with WordPress %1$s: %2$d%% (%3$d "works" votes out of %4$d total)'), $core_update_version, $update_compat[0], $update_compat[2], $update_compat[1]);
256			} else {
257				$compat .= '<br />' . sprintf(__('Compatibility with WordPress %1$s: Unknown'), $core_update_version);
258			}
259		}
260		// Get the upgrade notice for the new plugin version.
261		if ( isset($plugin_data->update->upgrade_notice) ) {
262			$upgrade_notice = '<br />' . strip_tags($plugin_data->update->upgrade_notice);
263		} else {
264			$upgrade_notice = '';
265		}
266
267		$details_url = self_admin_url('plugin-install.php?tab=plugin-information&plugin=' . $plugin_data->update->slug . '&section=changelog&TB_iframe=true&width=640&height=662');
268		$details_text = sprintf(__('View version %1$s details'), $plugin_data->update->new_version);
269		$details = sprintf('<a href="%1$s" class="thickbox" title="%2$s">%3$s</a>.', esc_url($details_url), esc_attr($plugin_data->Name), $details_text);
270
271		echo "
272	<tr>
273		<th scope='row' class='check-column'><input type='checkbox' name='checked[]' value='" . esc_attr($plugin_file) . "' /></th>
274		<td><p><strong>{$plugin_data->Name}</strong><br />" . sprintf(__('You have version %1$s installed. Update to %2$s.'), $plugin_data->Version, $plugin_data->update->new_version) . ' ' . $details . $compat . $upgrade_notice . "</p></td>
275	</tr>";
276	}
277?>
278	</tbody>
279
280	<tfoot>
281	<tr>
282		<th scope="col" class="manage-column check-column"><input type="checkbox" id="plugins-select-all-2" /></th>
283		<th scope="col" class="manage-column"><label for="plugins-select-all-2"><?php _e( 'Select All' ); ?></label></th>
284	</tr>
285	</tfoot>
286</table>
287<p><input id="upgrade-plugins-2" class="button" type="submit" value="<?php esc_attr_e('Update Plugins'); ?>" name="upgrade" /></p>
288</form>
289<?php
290}
291
292function list_theme_updates() {
293	$themes = get_theme_updates();
294	if ( empty( $themes ) ) {
295		echo '<h3>' . __( 'Themes' ) . '</h3>';
296		echo '<p>' . __( 'Your themes are all up to date.' ) . '</p>';
297		return;
298	}
299
300	$form_action = 'update-core.php?action=do-theme-upgrade';
301
302?>
303<h3><?php _e( 'Themes' ); ?></h3>
304<p><?php _e( 'The following themes have new versions available. Check the ones you want to update and then click &#8220;Update Themes&#8221;.' ); ?></p>
305<p><?php printf( __( '<strong>Please Note:</strong> Any customizations you have made to theme files will be lost. Please consider using <a href="%s">child themes</a> for modifications.' ), __( 'https://codex.wordpress.org/Child_Themes' ) ); ?></p>
306<form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-themes" class="upgrade">
307<?php wp_nonce_field('upgrade-core'); ?>
308<p><input id="upgrade-themes" class="button" type="submit" value="<?php esc_attr_e('Update Themes'); ?>" name="upgrade" /></p>
309<table class="widefat" id="update-themes-table">
310	<thead>
311	<tr>
312		<th scope="col" class="manage-column check-column"><input type="checkbox" id="themes-select-all" /></th>
313		<th scope="col" class="manage-column"><label for="themes-select-all"><?php _e('Select All'); ?></label></th>
314	</tr>
315	</thead>
316
317	<tbody class="plugins">
318<?php
319	foreach ( $themes as $stylesheet => $theme ) {
320		echo "
321	<tr>
322		<th scope='row' class='check-column'><input type='checkbox' name='checked[]' value='" . esc_attr( $stylesheet ) . "' /></th>
323		<td class='plugin-title'><img src='" . esc_url( $theme->get_screenshot() ) . "' width='85' height='64' style='float:left; padding: 0 5px 5px' /><strong>" . $theme->display('Name') . '</strong> ' . sprintf( __( 'You have version %1$s installed. Update to %2$s.' ), $theme->display('Version'), $theme->update['new_version'] ) . "</td>
324	</tr>";
325	}
326?>
327	</tbody>
328
329	<tfoot>
330	<tr>
331		<th scope="col" class="manage-column check-column"><input type="checkbox" id="themes-select-all-2" /></th>
332		<th scope="col" class="manage-column"><label for="themes-select-all-2"><?php _e( 'Select All' ); ?></label></th>
333	</tr>
334	</tfoot>
335</table>
336<p><input id="upgrade-themes-2" class="button" type="submit" value="<?php esc_attr_e('Update Themes'); ?>" name="upgrade" /></p>
337</form>
338<?php
339}
340
341function list_translation_updates() {
342	$updates = wp_get_translation_updates();
343	if ( ! $updates ) {
344		if ( 'en_US' != get_locale() ) {
345			echo '<h3>' . __( 'Translations' ) . '</h3>';
346			echo '<p>' . __( 'Your translations are all up to date.' ) . '</p>';
347		}
348		return;
349	}
350
351	$form_action = 'update-core.php?action=do-translation-upgrade';
352	?>
353	<h3><?php _e( 'Translations' ); ?></h3>
354	<form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-translations" class="upgrade">
355		<p><?php _e( 'New translations are available.' ); ?></p>
356		<?php wp_nonce_field( 'upgrade-translations' ); ?>
357		<p><input class="button" type="submit" value="<?php esc_attr_e( 'Update Translations' ); ?>" name="upgrade" /></p>
358	</form>
359	<?php
360}
361
362/**
363 * Upgrade WordPress core display.
364 *
365 * @since 2.7.0
366 *
367 * @return null
368 */
369function do_core_upgrade( $reinstall = false ) {
370	global $wp_filesystem;
371
372	include_once( ABSPATH . 'wp-admin/includes/class-wp-upgrader.php' );
373
374	if ( $reinstall )
375		$url = 'update-core.php?action=do-core-reinstall';
376	else
377		$url = 'update-core.php?action=do-core-upgrade';
378	$url = wp_nonce_url($url, 'upgrade-core');
379
380	$version = isset( $_POST['version'] )? $_POST['version'] : false;
381	$locale = isset( $_POST['locale'] )? $_POST['locale'] : 'en_US';
382	$update = find_core_update( $version, $locale );
383	if ( !$update )
384		return;
385
386	// Allow relaxed file ownership writes for User-initiated upgrades when the API specifies
387	// that it's safe to do so. This only happens when there are no new files to create.
388	$allow_relaxed_file_ownership = ! $reinstall && isset( $update->new_files ) && ! $update->new_files;
389
390?>
391	<div class="wrap">
392	<h2><?php _e('Update WordPress'); ?></h2>
393<?php
394
395	if ( false === ( $credentials = request_filesystem_credentials( $url, '', false, ABSPATH, array( 'version', 'locale' ), $allow_relaxed_file_ownership ) ) ) {
396		echo '</div>';
397		return;
398	}
399
400	if ( ! WP_Filesystem( $credentials, ABSPATH, $allow_relaxed_file_ownership ) ) {
401		// Failed to connect, Error and request again
402		request_filesystem_credentials( $url, '', true, ABSPATH, array( 'version', 'locale' ), $allow_relaxed_file_ownership );
403		echo '</div>';
404		return;
405	}
406
407	if ( $wp_filesystem->errors->get_error_code() ) {
408		foreach ( $wp_filesystem->errors->get_error_messages() as $message )
409			show_message($message);
410		echo '</div>';
411		return;
412	}
413
414	if ( $reinstall )
415		$update->response = 'reinstall';
416
417	add_filter( 'update_feedback', 'show_message' );
418
419	$upgrader = new Core_Upgrader();
420	$result = $upgrader->upgrade( $update, array(
421		'allow_relaxed_file_ownership' => $allow_relaxed_file_ownership
422	) );
423
424	if ( is_wp_error($result) ) {
425		show_message($result);
426		if ('up_to_date' != $result->get_error_code() )
427			show_message( __('Installation Failed') );
428		echo '</div>';
429		return;
430	}
431
432	show_message( __('WordPress updated successfully') );
433	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $result, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
434	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $result, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
435	?>
436	</div>
437	<script type="text/javascript">
438	window.location = '<?php echo self_admin_url( 'about.php?updated' ); ?>';
439	</script>
440	<?php
441}
442
443function do_dismiss_core_update() {
444	$version = isset( $_POST['version'] )? $_POST['version'] : false;
445	$locale = isset( $_POST['locale'] )? $_POST['locale'] : 'en_US';
446	$update = find_core_update( $version, $locale );
447	if ( !$update )
448		return;
449	dismiss_core_update( $update );
450	wp_redirect( wp_nonce_url('update-core.php?action=upgrade-core', 'upgrade-core') );
451	exit;
452}
453
454function do_undismiss_core_update() {
455	$version = isset( $_POST['version'] )? $_POST['version'] : false;
456	$locale = isset( $_POST['locale'] )? $_POST['locale'] : 'en_US';
457	$update = find_core_update( $version, $locale );
458	if ( !$update )
459		return;
460	undismiss_core_update( $version, $locale );
461	wp_redirect( wp_nonce_url('update-core.php?action=upgrade-core', 'upgrade-core') );
462	exit;
463}
464
465$action = isset($_GET['action']) ? $_GET['action'] : 'upgrade-core';
466
467$upgrade_error = false;
468if ( ( 'do-theme-upgrade' == $action || ( 'do-plugin-upgrade' == $action && ! isset( $_GET['plugins'] ) ) )
469	&& ! isset( $_POST['checked'] ) ) {
470	$upgrade_error = $action == 'do-theme-upgrade' ? 'themes' : 'plugins';
471	$action = 'upgrade-core';
472}
473
474$title = __('WordPress Updates');
475$parent_file = 'index.php';
476
477$updates_overview  = '<p>' . __( 'On this screen, you can update to the latest version of WordPress, as well as update your themes and plugins from the WordPress.org repositories.' ) . '</p>';
478$updates_overview .= '<p>' . __( 'If an update is available, you&#8127;ll see a notification appear in the Toolbar and navigation menu.' ) . ' ' . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' ) . '</p>';
479
480get_current_screen()->add_help_tab( array(
481	'id'      => 'overview',
482	'title'   => __( 'Overview' ),
483	'content' => $updates_overview
484) );
485
486$updates_howto  = '<p>' . __( '<strong>WordPress</strong> &mdash; Updating your WordPress installation is a simple one-click procedure: just <strong>click on the &#8220;Update Now&#8221; button</strong> when you are notified that a new version is available.' ) . ' ' . __( 'In most cases, WordPress will automatically apply maintenance and security updates in the background for you.' ) . '</p>';
487$updates_howto .= '<p>' . __( '<strong>Themes and Plugins</strong> &mdash; To update individual themes or plugins from this screen, use the checkboxes to make your selection, then <strong>click on the appropriate &#8220;Update&#8221; button</strong>. To update all of your themes or plugins at once, you can check the box at the top of the section to select all before clicking the update button.' ) . '</p>';
488
489if ( 'en_US' != get_locale() ) {
490	$updates_howto .= '<p>' . __( '<strong>Translations</strong> &mdash; The files translating WordPress into your language are updated for you whenever any other updates occur. But if these files are out of date, you can <strong>click the &#8220;Update Translations&#8221;</strong> button.' ) . '</p>';
491}
492
493get_current_screen()->add_help_tab( array(
494	'id'      => 'how-to-update',
495	'title'   => __( 'How to Update' ),
496	'content' => $updates_howto
497) );
498
499get_current_screen()->set_help_sidebar(
500	'<p><strong>' . __('For more information:') . '</strong></p>' .
501	'<p>' . __( '<a href="https://codex.wordpress.org/Dashboard_Updates_Screen" target="_blank">Documentation on Updating WordPress</a>' ) . '</p>' .
502	'<p>' . __( '<a href="https://wordpress.org/support/" target="_blank">Support Forums</a>' ) . '</p>'
503);
504
505if ( 'upgrade-core' == $action ) {
506	// Force a update check when requested
507	$force_check = ! empty( $_GET['force-check'] );
508	wp_version_check( array(), $force_check );
509
510	require_once(ABSPATH . 'wp-admin/admin-header.php');
511	?>
512	<div class="wrap">
513	<h2><?php _e('WordPress Updates'); ?></h2>
514	<?php
515	if ( $upgrade_error ) {
516		echo '<div class="error"><p>';
517		if ( $upgrade_error == 'themes' )
518			_e('Please select one or more themes to update.');
519		else
520			_e('Please select one or more plugins to update.');
521		echo '</p></div>';
522	}
523
524	echo '<p>';
525	/* translators: %1 date, %2 time. */
526	printf( __('Last checked on %1$s at %2$s.'), date_i18n( get_option( 'date_format' ) ), date_i18n( get_option( 'time_format' ) ) );
527	echo ' &nbsp; <a class="button" href="' . esc_url( self_admin_url('update-core.php?force-check=1') ) . '">' . __( 'Check Again' ) . '</a>';
528	echo '</p>';
529
530	if ( $core = current_user_can( 'update_core' ) )
531		core_upgrade_preamble();
532	if ( $plugins = current_user_can( 'update_plugins' ) )
533		list_plugin_updates();
534	if ( $themes = current_user_can( 'update_themes' ) )
535		list_theme_updates();
536	if ( $core || $plugins || $themes )
537		list_translation_updates();
538	unset( $core, $plugins, $themes );
539	/**
540	 * Fires after the core, plugin, and theme update tables.
541	 *
542	 * @since 2.9.0
543	 */
544	do_action( 'core_upgrade_preamble' );
545	echo '</div>';
546	include(ABSPATH . 'wp-admin/admin-footer.php');
547
548} elseif ( 'do-core-upgrade' == $action || 'do-core-reinstall' == $action ) {
549
550	if ( ! current_user_can( 'update_core' ) )
551		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );
552
553	check_admin_referer('upgrade-core');
554
555	// Do the (un)dismiss actions before headers, so that they can redirect.
556	if ( isset( $_POST['dismiss'] ) )
557		do_dismiss_core_update();
558	elseif ( isset( $_POST['undismiss'] ) )
559		do_undismiss_core_update();
560
561	require_once(ABSPATH . 'wp-admin/admin-header.php');
562	if ( 'do-core-reinstall' == $action )
563		$reinstall = true;
564	else
565		$reinstall = false;
566
567	if ( isset( $_POST['upgrade'] ) )
568		do_core_upgrade($reinstall);
569
570	include(ABSPATH . 'wp-admin/admin-footer.php');
571
572} elseif ( 'do-plugin-upgrade' == $action ) {
573
574	if ( ! current_user_can( 'update_plugins' ) )
575		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );
576
577	check_admin_referer('upgrade-core');
578
579	if ( isset( $_GET['plugins'] ) ) {
580		$plugins = explode( ',', $_GET['plugins'] );
581	} elseif ( isset( $_POST['checked'] ) ) {
582		$plugins = (array) $_POST['checked'];
583	} else {
584		wp_redirect( admin_url('update-core.php') );
585		exit;
586	}
587
588	$url = 'update.php?action=update-selected&plugins=' . urlencode(implode(',', $plugins));
589	$url = wp_nonce_url($url, 'bulk-update-plugins');
590
591	$title = __('Update Plugins');
592
593	require_once(ABSPATH . 'wp-admin/admin-header.php');
594	echo '<div class="wrap">';
595	echo '<h2>' . esc_html__('Update Plugins') . '</h2>';
596	echo '<iframe src="', $url, '" style="width: 100%; height: 100%; min-height: 750px;" frameborder="0"></iframe>';
597	echo '</div>';
598	include(ABSPATH . 'wp-admin/admin-footer.php');
599
600} elseif ( 'do-theme-upgrade' == $action ) {
601
602	if ( ! current_user_can( 'update_themes' ) )
603		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );
604
605	check_admin_referer('upgrade-core');
606
607	if ( isset( $_GET['themes'] ) ) {
608		$themes = explode( ',', $_GET['themes'] );
609	} elseif ( isset( $_POST['checked'] ) ) {
610		$themes = (array) $_POST['checked'];
611	} else {
612		wp_redirect( admin_url('update-core.php') );
613		exit;
614	}
615
616	$url = 'update.php?action=update-selected-themes&themes=' . urlencode(implode(',', $themes));
617	$url = wp_nonce_url($url, 'bulk-update-themes');
618
619	$title = __('Update Themes');
620
621	require_once(ABSPATH . 'wp-admin/admin-header.php');
622	?>
623	<div class="wrap">
624		<h2><?php echo esc_html__('Update Themes') ?></h2>
625		<iframe src="<?php echo $url ?>" style="width: 100%; height: 100%; min-height: 750px;" frameborder="0"></iframe>
626	</div>
627	<?php
628	include(ABSPATH . 'wp-admin/admin-footer.php');
629
630} elseif ( 'do-translation-upgrade' == $action ) {
631
632	if ( ! current_user_can( 'update_core' ) && ! current_user_can( 'update_plugins' ) && ! current_user_can( 'update_themes' ) )
633		wp_die( __( 'You do not have sufficient permissions to update this site.' ) );
634
635	check_admin_referer( 'upgrade-translations' );
636
637	require_once( ABSPATH . 'wp-admin/admin-header.php' );
638	include_once( ABSPATH . 'wp-admin/includes/class-wp-upgrader.php' );
639
640	$url = 'update-core.php?action=do-translation-upgrade';
641	$nonce = 'upgrade-translations';
642	$title = __( 'Update Translations' );
643	$context = WP_LANG_DIR;
644
645	$upgrader = new Language_Pack_Upgrader( new Language_Pack_Upgrader_Skin( compact( 'url', 'nonce', 'title', 'context' ) ) );
646	$result = $upgrader->bulk_upgrade();
647
648	require_once( ABSPATH . 'wp-admin/admin-footer.php' );
649
650} else {
651	/**
652	 * Fires for each custom update action on the WordPress Updates screen.
653	 *
654	 * The dynamic portion of the hook name, `$action`, refers to the
655	 * passed update action. The hook fires in lieu of all available
656	 * default update actions.
657	 *
658	 * @since 3.2.0
659	 */
660	do_action( "update-core-custom_{$action}" );
661}