/** * A simple set of functions to check our version 1.0 update service. * * @package WordPress * @since 2.3.0 */ /** * Check WordPress version against the newest version. * * The WordPress version, PHP version, and Locale is sent. Checks against the * WordPress server at api.wordpress.org server. Will only check if WordPress * isn't installing. * * @since 2.3.0 * @uses $wp_version Used to check against the newest WordPress version. * * @param array $extra_stats Extra statistics to report to the WordPress.org API. * @param bool $force_check Whether to bypass the transient cache and force a fresh update check. Defaults to false, true if $extra_stats is set. * @return mixed Returns null if update is unsupported. Returns false if check is too soon. */ function wp_version_check( $extra_stats = array(), $force_check = false ) { if ( defined('WP_INSTALLING') ) return; global $wpdb, $wp_local_package; include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version $php_version = phpversion(); $current = get_site_transient( 'update_core' ); $translations = wp_get_installed_translations( 'core' ); // Invalidate the transient when $wp_version changes if ( is_object( $current ) && $wp_version != $current->version_checked ) $current = false; if ( ! is_object($current) ) { $current = new stdClass; $current->updates = array(); $current->version_checked = $wp_version; } if ( ! empty( $extra_stats ) ) $force_check = true; // Wait 60 seconds between multiple version check requests $timeout = 60; $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked ); if ( ! $force_check && $time_not_changed ) return false; $locale = get_locale(); /** * Filter the locale requested for WordPress core translations. * * @since 2.8.0 * * @param string $locale Current locale. */ $locale = apply_filters( 'core_version_check_locale', $locale ); // Update last_checked for current to prevent multiple blocking requests if request hangs $current->last_checked = time(); set_site_transient( 'update_core', $current ); if ( method_exists( $wpdb, 'db_version' ) ) $mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version()); else $mysql_version = 'N/A'; if ( is_multisite() ) { $user_count = get_user_count(); $num_blogs = get_blog_count(); $wp_install = network_site_url(); $multisite_enabled = 1; } else { $user_count = count_users(); $user_count = $user_count['total_users']; $multisite_enabled = 0; $num_blogs = 1; $wp_install = home_url( '/' ); } $query = array( 'version' => $wp_version, 'php' => $php_version, 'locale' => $locale, 'mysql' => $mysql_version, 'local_package' => isset( $wp_local_package ) ? $wp_local_package : '', 'blogs' => $num_blogs, 'users' => $user_count, 'multisite_enabled' => $multisite_enabled, ); $post_body = array( 'translations' => json_encode( $translations ), ); if ( is_array( $extra_stats ) ) $post_body = array_merge( $post_body, $extra_stats ); $url = $http_url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' ); if ( $ssl = wp_http_supports( array( 'ssl' ) ) ) $url = set_url_scheme( $url, 'https' ); $options = array( 'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ), 'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ), 'headers' => array( 'wp_install' => $wp_install, 'wp_blog' => home_url( '/' ) ), 'body' => $post_body, ); $response = wp_remote_post( $url, $options ); if ( $ssl && is_wp_error( $response ) ) { trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE ); $response = wp_remote_post( $http_url, $options ); } if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) ) return false; $body = trim( wp_remote_retrieve_body( $response ) ); $body = json_decode( $body, true ); if ( ! is_array( $body ) || ! isset( $body['offers'] ) ) return false; $offers = $body['offers']; foreach ( $offers as &$offer ) { foreach ( $offer as $offer_key => $value ) { if ( 'packages' == $offer_key ) $offer['packages'] = (object) array_intersect_key( array_map( 'esc_url', $offer['packages'] ), array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial', 'rollback' ), '' ) ); elseif ( 'download' == $offer_key ) $offer['download'] = esc_url( $value ); else $offer[ $offer_key ] = esc_html( $value ); } $offer = (object) array_intersect_key( $offer, array_fill_keys( array( 'response', 'download', 'locale', 'packages', 'current', 'version', 'php_version', 'mysql_version', 'new_bundled', 'partial_version', 'notify_email', 'support_email' ), '' ) ); } $updates = new stdClass(); $updates->updates = $offers; $updates->last_checked = time(); $updates->version_checked = $wp_version; if ( isset( $body['translations'] ) ) $updates->translations = $body['translations']; set_site_transient( 'update_core', $updates ); if ( ! empty( $body['ttl'] ) ) { $ttl = (int) $body['ttl']; if ( $ttl && ( time() + $ttl < wp_next_scheduled( 'wp_version_check' ) ) ) { // Queue an event to re-run the update check in $ttl seconds. wp_schedule_single_event( time() + $ttl, 'wp_version_check' ); } } // Trigger a background updates check if running non-interactively, and we weren't called from the update handler. if ( defined( 'DOING_CRON' ) && DOING_CRON && ! doing_action( 'wp_maybe_auto_update' ) ) { do_action( 'wp_maybe_auto_update' ); } } /** * Check plugin versions against the latest versions hosted on WordPress.org. * * The WordPress version, PHP version, and Locale is sent along with a list of * all plugins installed. Checks against the WordPress server at * api.wordpress.org. Will only check if WordPress isn't installing. * * @since 2.3.0 * @uses $wp_version Used to notify the WordPress version. * * @param array $extra_stats Extra statistics to report to the WordPress.org API. * @return mixed Returns null if update is unsupported. Returns false if check is too soon. */ function wp_update_plugins( $extra_stats = array() ) { include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version if ( defined('WP_INSTALLING') ) return false; // If running blog-side, bail unless we've not checked in the last 12 hours if ( !function_exists( 'get_plugins' ) ) require_once( ABSPATH . 'wp-admin/includes/plugin.php' ); $plugins = get_plugins(); $translations = wp_get_installed_translations( 'plugins' ); $active = get_option( 'active_plugins', array() ); $current = get_site_transient( 'update_plugins' ); if ( ! is_object($current) ) $current = new stdClass; $new_option = new stdClass; $new_option->last_checked = time(); // Check for update on a different schedule, depending on the page. switch ( current_filter() ) { case 'upgrader_process_complete' : $timeout = 0; break; case 'load-update-core.php' : $timeout = MINUTE_IN_SECONDS; break; case 'load-plugins.php' : case 'load-update.php' : $timeout = HOUR_IN_SECONDS; break; default : if ( defined( 'DOING_CRON' ) && DOING_CRON ) { $timeout = 0; } else { $timeout = 12 * HOUR_IN_SECONDS; } } $time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked ); if ( $time_not_changed && ! $extra_stats ) { $plugin_changed = false; foreach ( $plugins as $file => $p ) { $new_option->checked[ $file ] = $p['Version']; if ( !isset( $current->checked[ $file ] ) || strval($current->checked[ $file ]) !== strval($p['Version']) ) $plugin_changed = true; } if ( isset ( $current->response ) && is_array( $current->response ) ) { foreach ( $current->response as $plugin_file => $update_details ) { if ( ! isset($plugins[ $plugin_file ]) ) { $plugin_changed = true; break; } } } // Bail if we've checked recently and if nothing has changed if ( ! $plugin_changed ) return false; } // Update last_checked for current to prevent multiple blocking requests if request hangs $current->last_checked = time(); set_site_transient( 'update_plugins', $current ); $to_send = compact( 'plugins', 'active' ); $locales = array( get_locale() ); /** * Filter the locales requested for plugin translations. * * @since 3.7.0 * * @param array $locales Plugin locale. Default is current locale of the site. */ $locales = apply_filters( 'plugins_update_check_locales', $locales ); if ( defined( 'DOING_CRON' ) && DOING_CRON ) { $timeout = 30; } else { // Three seconds, plus one extra second for every 10 plugins $timeout = 3 + (int) ( count( $plugins ) / 10 ); } $options = array( 'timeout' => $timeout, 'body' => array( 'plugins' => json_encode( $to_send ), 'translations' => json_encode( $translations ), 'locale' => json_encode( $locales ), 'all' => json_encode( true ), ), 'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ); if ( $extra_stats ) { $options['body']['update_stats'] = json_encode( $extra_stats ); } $url = $http_url = 'http://api.wordpress.org/plugins/update-check/1.1/'; if ( $ssl = wp_http_supports( array( 'ssl' ) ) ) $url = set_url_scheme( $url, 'https' ); $raw_response = wp_remote_post( $url, $options ); if ( $ssl && is_wp_error( $raw_response ) ) { trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE ); $raw_response = wp_remote_post( $http_url, $options ); } if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) ) return false; $response = json_decode( wp_remote_retrieve_body( $raw_response ), true ); foreach ( $response['plugins'] as &$plugin ) { $plugin = (object) $plugin; } unset( $plugin ); foreach ( $response['no_update'] as &$plugin ) { $plugin = (object) $plugin; } unset( $plugin ); if ( is_array( $response ) ) { $new_option->response = $response['plugins']; $new_option->translations = $response['translations']; // TODO: Perhaps better to store no_update in a separate transient with an expiry? $new_option->no_update = $response['no_update']; } else { $new_option->response = array(); $new_option->translations = array(); $new_option->no_update = array(); } set_site_transient( 'update_plugins', $new_option ); } /** * Check theme versions against the latest versions hosted on WordPress.org. * * A list of all themes installed in sent to WP. Checks against the * WordPress server at api.wordpress.org. Will only check if WordPress isn't * installing. * * @since 2.7.0 * @uses $wp_version Used to notify the WordPress version. * * @param array $extra_stats Extra statistics to report to the WordPress.org API. * @return mixed Returns null if update is unsupported. Returns false if check is too soon. */ function wp_update_themes( $extra_stats = array() ) { include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version if ( defined( 'WP_INSTALLING' ) ) return false; $installed_themes = wp_get_themes(); $translations = wp_get_installed_translations( 'themes' ); $last_update = get_site_transient( 'update_themes' ); if ( ! is_object($last_update) ) $last_update = new stdClass; $themes = $checked = $request = array(); // Put slug of current theme into request. $request['active'] = get_option( 'stylesheet' ); foreach ( $installed_themes as $theme ) { $checked[ $theme->get_stylesheet() ] = $theme->get('Version'); $themes[ $theme->get_stylesheet() ] = array( 'Name' => $theme->get('Name'), 'Title' => $theme->get('Name'), 'Version' => $theme->get('Version'), 'Author' => $theme->get('Author'), 'Author URI' => $theme->get('AuthorURI'), 'Template' => $theme->get_template(), 'Stylesheet' => $theme->get_stylesheet(), ); } // Check for update on a different schedule, depending on the page. switch ( current_filter() ) { case 'upgrader_process_complete' : $timeout = 0; break; case 'load-update-core.php' : $timeout = MINUTE_IN_SECONDS; break; case 'load-themes.php' : case 'load-update.php' : $timeout = HOUR_IN_SECONDS; break; default : if ( defined( 'DOING_CRON' ) && DOING_CRON ) { $timeout = 0; } else { $timeout = 12 * HOUR_IN_SECONDS; } } $time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked ); if ( $time_not_changed && ! $extra_stats ) { $theme_changed = false; foreach ( $checked as $slug => $v ) { if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) ) $theme_changed = true; } if ( isset ( $last_update->response ) && is_array( $last_update->response ) ) { foreach ( $last_update->response as $slug => $update_details ) { if ( ! isset($checked[ $slug ]) ) { $theme_changed = true; break; } } } // Bail if we've checked recently and if nothing has changed if ( ! $theme_changed ) return false; } // Update last_checked for current to prevent multiple blocking requests if request hangs $last_update->last_checked = time(); set_site_transient( 'update_themes', $last_update ); $request['themes'] = $themes; $locales = array( get_locale() ); /** * Filter the locales requested for theme translations. * * @since 3.7.0 * * @param array $locales Theme locale. Default is current locale of the site. */ $locales = apply_filters( 'themes_update_check_locales', $locales ); if ( defined( 'DOING_CRON' ) && DOING_CRON ) { $timeout = 30; } else { // Three seconds, plus one extra second for every 10 themes $timeout = 3 + (int) ( count( $themes ) / 10 ); } $options = array( 'timeout' => $timeout, 'body' => array( 'themes' => json_encode( $request ), 'translations' => json_encode( $translations ), 'locale' => json_encode( $locales ), ), 'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ); if ( $extra_stats ) { $options['body']['update_stats'] = json_encode( $extra_stats ); } $url = $http_url = 'http://api.wordpress.org/themes/update-check/1.1/'; if ( $ssl = wp_http_supports( array( 'ssl' ) ) ) $url = set_url_scheme( $url, 'https' ); $raw_response = wp_remote_post( $url, $options ); if ( $ssl && is_wp_error( $raw_response ) ) { trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the support forums.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE ); $raw_response = wp_remote_post( $http_url, $options ); } if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) ) return false; $new_update = new stdClass; $new_update->last_checked = time(); $new_update->checked = $checked; $response = json_decode( wp_remote_retrieve_body( $raw_response ), true ); if ( is_array( $response ) ) { $new_update->response = $response['themes']; $new_update->translations = $response['translations']; } set_site_transient( 'update_themes', $new_update ); } /** * Performs WordPress automatic background updates. * * @since 3.7.0 */ function wp_maybe_auto_update() { include_once( ABSPATH . '/wp-admin/includes/admin.php' ); include_once( ABSPATH . '/wp-admin/includes/class-wp-upgrader.php' ); $upgrader = new WP_Automatic_Updater; $upgrader->run(); } /** * Retrieves a list of all language updates available. * * @since 3.7.0 */ function wp_get_translation_updates() { $updates = array(); $transients = array( 'update_core' => 'core', 'update_plugins' => 'plugin', 'update_themes' => 'theme' ); foreach ( $transients as $transient => $type ) { $transient = get_site_transient( $transient ); if ( empty( $transient->translations ) ) continue; foreach ( $transient->translations as $translation ) { $updates[] = (object) $translation; } } return $updates; } /** * Collect counts and UI strings for available updates * * @since 3.3.0 * * @return array */ function wp_get_update_data() { $counts = array( 'plugins' => 0, 'themes' => 0, 'wordpress' => 0, 'translations' => 0 ); if ( $plugins = current_user_can( 'update_plugins' ) ) { $update_plugins = get_site_transient( 'update_plugins' ); if ( ! empty( $update_plugins->response ) ) $counts['plugins'] = count( $update_plugins->response ); } if ( $themes = current_user_can( 'update_themes' ) ) { $update_themes = get_site_transient( 'update_themes' ); if ( ! empty( $update_themes->response ) ) $counts['themes'] = count( $update_themes->response ); } if ( ( $core = current_user_can( 'update_core' ) ) && function_exists( 'get_core_updates' ) ) { $update_wordpress = get_core_updates( array('dismissed' => false) ); if ( ! empty( $update_wordpress ) && ! in_array( $update_wordpress[0]->response, array('development', 'latest') ) && current_user_can('update_core') ) $counts['wordpress'] = 1; } if ( ( $core || $plugins || $themes ) && wp_get_translation_updates() ) $counts['translations'] = 1; $counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'] + $counts['translations']; $titles = array(); if ( $counts['wordpress'] ) $titles['wordpress'] = sprintf( __( '%d WordPress Update'), $counts['wordpress'] ); if ( $counts['plugins'] ) $titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] ); if ( $counts['themes'] ) $titles['themes'] = sprintf( _n( '%d Theme Update', '%d Theme Updates', $counts['themes'] ), $counts['themes'] ); if ( $counts['translations'] ) $titles['translations'] = __( 'Translation Updates' ); $update_title = $titles ? esc_attr( implode( ', ', $titles ) ) : ''; $update_data = array( 'counts' => $counts, 'title' => $update_title ); /** * Filter the returned array of update data for plugins, themes, and WordPress core. * * @since 3.5.0 * * @param array $update_data { * Fetched update data. * * @type array $counts An array of counts for available plugin, theme, and WordPress updates. * @type string $update_title Titles of available updates. * } * @param array $titles An array of update counts and UI strings for available updates. */ return apply_filters( 'wp_get_update_data', $update_data, $titles ); } function _maybe_update_core() { include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version $current = get_site_transient( 'update_core' ); if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) && isset( $current->version_checked ) && $current->version_checked == $wp_version ) return; wp_version_check(); } /** * Check the last time plugins were run before checking plugin versions. * * This might have been backported to WordPress 2.6.1 for performance reasons. * This is used for the wp-admin to check only so often instead of every page * load. * * @since 2.7.0 * @access private */ function _maybe_update_plugins() { $current = get_site_transient( 'update_plugins' ); if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) ) return; wp_update_plugins(); } /** * Check themes versions only after a duration of time. * * This is for performance reasons to make sure that on the theme version * checker is not run on every page load. * * @since 2.7.0 * @access private */ function _maybe_update_themes() { $current = get_site_transient( 'update_themes' ); if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) ) return; wp_update_themes(); } /** * Schedule core, theme, and plugin update checks. * * @since 3.1.0 */ function wp_schedule_update_checks() { if ( !wp_next_scheduled('wp_version_check') && !defined('WP_INSTALLING') ) wp_schedule_event(time(), 'twicedaily', 'wp_version_check'); if ( !wp_next_scheduled('wp_update_plugins') && !defined('WP_INSTALLING') ) wp_schedule_event(time(), 'twicedaily', 'wp_update_plugins'); if ( !wp_next_scheduled('wp_update_themes') && !defined('WP_INSTALLING') ) wp_schedule_event(time(), 'twicedaily', 'wp_update_themes'); if ( ( wp_next_scheduled( 'wp_maybe_auto_update' ) > ( time() + HOUR_IN_SECONDS ) ) && ! defined('WP_INSTALLING') ) wp_clear_scheduled_hook( 'wp_maybe_auto_update' ); } if ( ( ! is_main_site() && ! is_network_admin() ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) ) return; add_action( 'admin_init', '_maybe_update_core' ); add_action( 'wp_version_check', 'wp_version_check' ); add_action( 'upgrader_process_complete', 'wp_version_check', 10, 0 ); add_action( 'load-plugins.php', 'wp_update_plugins' ); add_action( 'load-update.php', 'wp_update_plugins' ); add_action( 'load-update-core.php', 'wp_update_plugins' ); add_action( 'admin_init', '_maybe_update_plugins' ); add_action( 'wp_update_plugins', 'wp_update_plugins' ); add_action( 'upgrader_process_complete', 'wp_update_plugins', 10, 0 ); add_action( 'load-themes.php', 'wp_update_themes' ); add_action( 'load-update.php', 'wp_update_themes' ); add_action( 'load-update-core.php', 'wp_update_themes' ); add_action( 'admin_init', '_maybe_update_themes' ); add_action( 'wp_update_themes', 'wp_update_themes' ); add_action( 'upgrader_process_complete', 'wp_update_themes', 10, 0 ); add_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' ); add_action('init', 'wp_schedule_update_checks'); Jimmy Carter y el problema de los neutrinosSesiónDeControl.com
Arrow

Jimmy ‘Neutrino’ Carter


2
Javier Sanz

Javier Sanz. Aficionado a la historia. Autor del blog Historias de la Historia. He escrito artículos para Revista Medieval y XLSemanal, colaborado en 'A vivir que son dos días' (Cadena Ser) y, actualmente, en LRV (Onda Cero), Gente Despierta (RNE), La Noche es Nuestra (EuropaFM), Diario de Teruel y el magazine para iPad "UnBreak". Ha publicado "Nunca me aprendí la lista de los reyes godos", ¡Fuego a discreción! y Caballos de Troya de la historia


Escrito el 18 de febrero de 2013 a las 8:38 | Clasificado en Historia

Los presidentes tienen la costumbre de rodearse de cientos de asesores en distintas materias, aunque a veces uno duda de su eficacia. Otras, bastante tendrán con aguantar la risa por las “tonterías” que tienen que oír.

El expresidente Jimmy Carter, en una imagen reciente (Fuente: Wikipedia)
El expresidente Jimmy Carter, en una imagen reciente (Fuente: Wikipedia)

El problema de los neutrinos solares se debió a una gran discrepancia entre el número de neutrinos que llegaban a la Tierra y los modelos teóricos del interior del Sol. Este problema comenzó a estudiarse en la década de 1960 y ha sido resuelto recientemente mediante un nuevo entendimiento de la física de neutrinos, necesitando una modificación en el modelo estándar de la física de partículas.

Básicamente, debido a que los neutrinos tienen masa, pueden cambiar del tipo de neutrino que se produce en el interior del Sol, el neutrino electrónico, en dos tipos de neutrinos, el muónico y el tauónico, que, inicialmente, no fueron detectados.

Durante la presidencia de Jimmy Carter (1977-1981), y mientras leía la prensa del día, se encontró con un titular que le dejó preocupado:

Llegan del Sol menos neutrinos de los esperados.

Cuando llegó su asesor en materia de ciencia, el físico Fran Press, el presidente señalando el titular le dijo:

¿Podemos hacer algo, Press?

Si muchas veces criticamos la labor de los asesores, por su alto coste y el elevado número de los que se contratan, en otras ocasiones, como en ésta, supongo que para Press debió ser un papelón… No sabemos la respuesta del asesor pero Carter se merecía una del estilo:

Llame a Bruce Willis y a su grupo de perforadores de plataformas petrolíferas para que taladren la superficie del Sol, hagan estallar una bomba nuclear y así producir más reacciones termonucleares para que se generen más neutrinos

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