WordPress/WordPress

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wp-admin/includes/update.php

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<?php
/**
 * WordPress Administration Update API
 *
 * @package WordPress
 * @subpackage Administration
 */

/**
 * Selects the first update version from the update_core option.
 *
 * @since 2.7.0
 *
 * @return object|array|false The response from the API on success, false on failure.
 */
function get_preferred_from_update_core() {
    $updates = get_core_updates();

    if ( ! is_array( $updates ) ) {
        return false;
    }

    if ( empty( $updates ) ) {
        return (object) array( 'response' => 'latest' );
    }

    return $updates[0];
}

/**
 * Gets available core updates.
 *
 * @since 2.7.0
 *
 * @param array $options Set $options['dismissed'] to true to show dismissed upgrades too,
 *                       set $options['available'] to false to skip not-dismissed updates.
 * @return array|false Array of the update objects on success, false on failure.
 */
function get_core_updates( $options = array() ) {
    $options = array_merge(
        array(
            'available' => true,
            'dismissed' => false,
        ),
        $options
    );

    $dismissed = get_site_option( 'dismissed_update_core' );

    if ( ! is_array( $dismissed ) ) {
        $dismissed = array();
    }

    $from_api = get_site_transient( 'update_core' );

    if ( ! isset( $from_api->updates ) || ! is_array( $from_api->updates ) ) {
        return false;
    }

    $updates = $from_api->updates;
    $result  = array();

    foreach ( $updates as $update ) {
        if ( 'autoupdate' === $update->response ) {
            continue;
        }

        if ( array_key_exists( $update->current . '|' . $update->locale, $dismissed ) ) {
            if ( $options['dismissed'] ) {
                $update->dismissed = true;
                $result[]          = $update;
            }
        } else {
            if ( $options['available'] ) {
                $update->dismissed = false;
                $result[]          = $update;
            }
        }
    }

    return $result;
}

/**
 * Gets the best available (and enabled) Auto-Update for WordPress core.
 *
 * If there's 1.2.3 and 1.3 on offer, it'll choose 1.3 if the installation allows it, else, 1.2.3.
 *
 * @since 3.7.0
 *
 * @return object|false The core update offering on success, false on failure.
 */
function find_core_auto_update() {
    $updates = get_site_transient( 'update_core' );

    if ( ! $updates || empty( $updates->updates ) ) {
        return false;
    }

    require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

    $auto_update = false;
    $upgrader    = new WP_Automatic_Updater();

    foreach ( $updates->updates as $update ) {
        if ( 'autoupdate' !== $update->response ) {
            continue;
        }

        if ( ! $upgrader->should_update( 'core', $update, ABSPATH ) ) {
            continue;
        }

        if ( ! $auto_update || version_compare( $update->current, $auto_update->current, '>' ) ) {
            $auto_update = $update;
        }
    }

    return $auto_update;
}

/**
 * Gets and caches the checksums for the given version of WordPress.
 *
 * @since 3.7.0
 *
 * @param string $version Version string to query.
 * @param string $locale  Locale to query.
 * @return array|false An array of checksums on success, false on failure.
 */
function get_core_checksums( $version, $locale ) {
    $http_url = 'http://api.wordpress.org/core/checksums/1.0/?' . http_build_query( compact( 'version', 'locale' ), '', '&' );
    $url      = $http_url;

    $ssl = wp_http_supports( array( 'ssl' ) );

    if ( $ssl ) {
        $url = set_url_scheme( $url, 'https' );
    }

    $options = array(
        'timeout' => wp_doing_cron() ? 30 : 3,
    );

    $response = wp_remote_get( $url, $options );

    if ( $ssl && is_wp_error( $response ) ) {
        trigger_error(
            sprintf(
                /* translators: %s: Support forums URL. */
                __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
                __( 'https://wordpress.org/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_get( $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['checksums'] ) || ! is_array( $body['checksums'] ) ) {
        return false;
    }

    return $body['checksums'];
}

/**
 * Dismisses core update.
 *
 * @since 2.7.0
 *
 * @param object $update
 * @return bool
 */
function dismiss_core_update( $update ) {
    $dismissed = get_site_option( 'dismissed_update_core' );
    $dismissed[ $update->current . '|' . $update->locale ] = true;

    return update_site_option( 'dismissed_update_core', $dismissed );
}

/**
 * Undismisses core update.
 *
 * @since 2.7.0
 *
 * @param string $version
 * @param string $locale
 * @return bool
 */
function undismiss_core_update( $version, $locale ) {
    $dismissed = get_site_option( 'dismissed_update_core' );
    $key       = $version . '|' . $locale;

    if ( ! isset( $dismissed[ $key ] ) ) {
        return false;
    }

    unset( $dismissed[ $key ] );

    return update_site_option( 'dismissed_update_core', $dismissed );
}

/**
 * Finds the available update for WordPress core.
 *
 * @since 2.7.0
 *
 * @param string $version Version string to find the update for.
 * @param string $locale  Locale to find the update for.
 * @return object|false The core update offering on success, false on failure.
 */
function find_core_update( $version, $locale ) {
    $from_api = get_site_transient( 'update_core' );

    if ( ! isset( $from_api->updates ) || ! is_array( $from_api->updates ) ) {
        return false;
    }

    $updates = $from_api->updates;

    foreach ( $updates as $update ) {
        if ( $update->current === $version && $update->locale === $locale ) {
            return $update;
        }
    }

    return false;
}

/**
 * Returns core update footer message.
 *
 * @since 2.3.0
 *
 * @param string $msg
 * @return string
 */
function core_update_footer( $msg = '' ) {
    if ( ! current_user_can( 'update_core' ) ) {
        /* translators: %s: WordPress version. */
        return sprintf( __( 'Version %s' ), get_bloginfo( 'version', 'display' ) );
    }

    $cur = get_preferred_from_update_core();

    if ( ! is_object( $cur ) ) {
        $cur = new stdClass();
    }

    if ( ! isset( $cur->current ) ) {
        $cur->current = '';
    }

    if ( ! isset( $cur->response ) ) {
        $cur->response = '';
    }

    // Include an unmodified $wp_version.
    require ABSPATH . WPINC . '/version.php';

    $is_development_version = preg_match( '/alpha|beta|RC/', $wp_version );

    if ( $is_development_version ) {
        return sprintf(
            /* translators: 1: WordPress version number, 2: URL to WordPress Updates screen. */
            __( 'You are using a development version (%1$s). Cool! Please <a href="%2$s">stay updated</a>.' ),
            get_bloginfo( 'version', 'display' ),
            network_admin_url( 'update-core.php' )
        );
    }

    switch ( $cur->response ) {
        case 'upgrade':
            return sprintf(
                '<strong><a href="%s">%s</a></strong>',
                network_admin_url( 'update-core.php' ),
                /* translators: %s: WordPress version. */
                sprintf( __( 'Get Version %s' ), $cur->current )
            );

        case 'latest':
        default:
            /* translators: %s: WordPress version. */
            return sprintf( __( 'Version %s' ), get_bloginfo( 'version', 'display' ) );
    }
}

/**
 * Returns core update notification message.
 *
 * @since 2.3.0
 *
 * @global string $pagenow The filename of the current screen.
 * @return void|false
 */
function update_nag() {
    global $pagenow;

    if ( is_multisite() && ! current_user_can( 'update_core' ) ) {
        return false;
    }

    if ( 'update-core.php' === $pagenow ) {
        return;
    }

    $cur = get_preferred_from_update_core();

    if ( ! isset( $cur->response ) || 'upgrade' !== $cur->response ) {
        return false;
    }

    $version_url = sprintf(
        /* translators: %s: WordPress version. */
        esc_url( __( 'https://wordpress.org/documentation/wordpress-version/version-%s/' ) ),
        sanitize_title( $cur->current )
    );

    if ( current_user_can( 'update_core' ) ) {
        $msg = sprintf(
            /* translators: 1: URL to WordPress release notes, 2: New WordPress version, 3: URL to network admin, 4: Accessibility text. */
            __( '<a href="%1$s">WordPress %2$s</a> is available! <a href="%3$s" aria-label="%4$s">Please update now</a>.' ),
            $version_url,
            $cur->current,
            network_admin_url( 'update-core.php' ),
            esc_attr__( 'Please update WordPress now' )
        );
    } else {
        $msg = sprintf(
            /* translators: 1: URL to WordPress release notes, 2: New WordPress version. */
            __( '<a href="%1$s">WordPress %2$s</a> is available! Please notify the site administrator.' ),
            $version_url,
            $cur->current
        );
    }

    wp_admin_notice(
        $msg,
        array(
            'type'               => 'warning',
            'additional_classes' => array( 'update-nag', 'inline' ),
            'paragraph_wrap'     => false,
        )
    );
}

/**
 * Displays WordPress version and active theme in the 'At a Glance' dashboard widget.
 *
 * @since 2.5.0
 */
function update_right_now_message() {
    $theme_name = wp_get_theme();

    if ( current_user_can( 'switch_themes' ) ) {
        $theme_name = sprintf( '<a href="themes.php">%1$s</a>', $theme_name );
    }

    $msg = '';

    if ( current_user_can( 'update_core' ) ) {
        $cur = get_preferred_from_update_core();

        if ( isset( $cur->response ) && 'upgrade' === $cur->response ) {
            $msg .= sprintf(
                '<a href="%s" class="button" aria-describedby="wp-version">%s</a> ',
                network_admin_url( 'update-core.php' ),
                /* translators: %s: WordPress version number, or 'Latest' string. */
                sprintf( __( 'Update to %s' ), $cur->current ? $cur->current : __( 'Latest' ) )
            );
        }
    }

    /* translators: 1: Version number, 2: Theme name. */
    $content = __( 'WordPress %1$s running %2$s theme.' );

    /**
     * Filters the text displayed in the 'At a Glance' dashboard widget.
     *
     * Prior to 3.8.0, the widget was named 'Right Now'.
     *
     * @since 4.4.0
     *
     * @param string $content Default text.
     */
    $content = apply_filters( 'update_right_now_text', $content );

    $msg .= sprintf( '<span id="wp-version">' . $content . '</span>', get_bloginfo( 'version', 'display' ), $theme_name );

    echo "<p id='wp-version-message'>$msg</p>";
}

/**
 * Retrieves plugins with updates available.
 *
 * @since 2.9.0
 *
 * @return array
 */
function get_plugin_updates() {
    $all_plugins     = get_plugins();
    $upgrade_plugins = array();
    $current         = get_site_transient( 'update_plugins' );

    foreach ( (array) $all_plugins as $plugin_file => $plugin_data ) {
        if ( isset( $current->response[ $plugin_file ] ) ) {
            $upgrade_plugins[ $plugin_file ]         = (object) $plugin_data;
            $upgrade_plugins[ $plugin_file ]->update = $current->response[ $plugin_file ];
        }
    }

    return $upgrade_plugins;
}

/**
 * Adds a callback to display update information for plugins with updates available.
 *
 * @since 2.9.0
 */
function wp_plugin_update_rows() {
    if ( ! current_user_can( 'update_plugins' ) ) {
        return;
    }

    $plugins = get_site_transient( 'update_plugins' );

    if ( isset( $plugins->response ) && is_array( $plugins->response ) ) {
        $plugins = array_keys( $plugins->response );

        foreach ( $plugins as $plugin_file ) {
            add_action( "after_plugin_row_{$plugin_file}", 'wp_plugin_update_row', 10, 2 );
        }
    }
}

/**
 * Displays update information for a plugin.
 *
 * @since 2.3.0
 *
 * @param string $file        Plugin basename.
 * @param array  $plugin_data Plugin information.
 * @return void|false
 */
function wp_plugin_update_row( $file, $plugin_data ) {
    $current = get_site_transient( 'update_plugins' );

    if ( ! isset( $current->response[ $file ] ) ) {
        return false;
    }

    $response = $current->response[ $file ];

    $plugins_allowedtags = array(
        'a'       => array(
            'href'  => array(),
            'title' => array(),
        ),
        'abbr'    => array( 'title' => array() ),
        'acronym' => array( 'title' => array() ),
        'code'    => array(),
        'em'      => array(),
        'strong'  => array(),
    );

    $plugin_name = wp_kses( $plugin_data['Name'], $plugins_allowedtags );
    $plugin_slug = isset( $response->slug ) ? $response->slug : $response->id;

    if ( isset( $response->slug ) ) {
        $details_url = self_admin_url( 'plugin-install.php?tab=plugin-information&plugin=' . $plugin_slug . '&section=changelog' );
    } elseif ( isset( $response->url ) ) {
        $details_url = $response->url;
    } else {
        $details_url = $plugin_data['PluginURI'];
    }

    $details_url = add_query_arg(
        array(
            'TB_iframe' => 'true',
            'width'     => 600,
            'height'    => 800,
        ),
        $details_url
    );

    /** @var WP_Plugins_List_Table $wp_list_table */
    $wp_list_table = _get_list_table(
        'WP_Plugins_List_Table',
        array(
            'screen' => get_current_screen(),
        )
    );

    if ( is_network_admin() || ! is_multisite() ) {
        if ( is_network_admin() ) {
            $active_class = is_plugin_active_for_network( $file ) ? ' active' : '';
        } else {
            $active_class = is_plugin_active( $file ) ? ' active' : '';
        }

        $requires_php   = isset( $response->requires_php ) ? $response->requires_php : null;
        $compatible_php = is_php_version_compatible( $requires_php );
        $notice_type    = $compatible_php ? 'notice-warning' : 'notice-error';

        printf(
            '<tr class="plugin-update-tr%s" id="%s" data-slug="%s" data-plugin="%s">' .
            '<td colspan="%s" class="plugin-update colspanchange">' .
            '<div class="update-message notice inline %s notice-alt"><p>',
            $active_class,
            esc_attr( $plugin_slug . '-update' ),
            esc_attr( $plugin_slug ),
            esc_attr( $file ),
            esc_attr( $wp_list_table->get_column_count() ),
            $notice_type
        );

        if ( ! current_user_can( 'update_plugins' ) ) {
            printf(
                /* translators: 1: Plugin name, 2: Details URL, 3: Additional link attributes, 4: Version number. */
                __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a>.' ),
                $plugin_name,
                esc_url( $details_url ),
                sprintf(
                    'class="thickbox open-plugin-details-modal" aria-label="%s"',
                    /* translators: 1: Plugin name, 2: Version number. */
                    esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $plugin_name, $response->new_version ) )
                ),
                esc_attr( $response->new_version )
            );
        } elseif ( empty( $response->package ) ) {
            printf(
                /* translators: 1: Plugin name, 2: Details URL, 3: Additional link attributes, 4: Version number. */
                __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a>. <em>Automatic update is unavailable for this plugin.</em>' ),
                $plugin_name,
                esc_url( $details_url ),
                sprintf(
                    'class="thickbox open-plugin-details-modal" aria-label="%s"',
                    /* translators: 1: Plugin name, 2: Version number. */
                    esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $plugin_name, $response->new_version ) )
                ),
                esc_attr( $response->new_version )
            );
        } else {
            if ( $compatible_php ) {
                printf(
                    /* translators: 1: Plugin name, 2: Details URL, 3: Additional link attributes, 4: Version number, 5: Update URL, 6: Additional link attributes. */
                    __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a> or <a href="%5$s" %6$s>update now</a>.' ),
                    $plugin_name,
                    esc_url( $details_url ),
                    sprintf(
                        'class="thickbox open-plugin-details-modal" aria-label="%s"',
                        /* translators: 1: Plugin name, 2: Version number. */
                        esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $plugin_name, $response->new_version ) )
                    ),
                    esc_attr( $response->new_version ),
                    wp_nonce_url( self_admin_url( 'update.php?action=upgrade-plugin&plugin=' ) . $file, 'upgrade-plugin_' . $file ),
                    sprintf(
                        'class="update-link" aria-label="%s"',
                        /* translators: %s: Plugin name. */
                        esc_attr( sprintf( _x( 'Update %s now', 'plugin' ), $plugin_name ) )
                    )
                );
            } else {
                printf(
                    /* translators: 1: Plugin name, 2: Details URL, 3: Additional link attributes, 4: Version number 5: URL to Update PHP page. */
                    __( 'There is a new version of %1$s available, but it does not work with your version of PHP. <a href="%2$s" %3$s>View version %4$s details</a> or <a href="%5$s">learn more about updating PHP</a>.' ),
                    $plugin_name,
                    esc_url( $details_url ),
                    sprintf(
                        'class="thickbox open-plugin-details-modal" aria-label="%s"',
                        /* translators: 1: Plugin name, 2: Version number. */
                        esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $plugin_name, $response->new_version ) )
                    ),
                    esc_attr( $response->new_version ),
                    esc_url( wp_get_update_php_url() )
                );
                wp_update_php_annotation( '<br><em>', '</em>' );
            }
        }

        /**
         * Fires at the end of the update message container in each
         * row of the plugins list table.
         *
         * The dynamic portion of the hook name, `$file`, refers to the path
         * of the plugin's primary file relative to the plugins directory.
         *
         * @since 2.8.0
         *
         * @param array  $plugin_data An array of plugin metadata. See get_plugin_data()
         *                            and the {@see 'plugin_row_meta'} filter for the list
         *                            of possible values.
         * @param object $response {
         *     An object of metadata about the available plugin update.
         *
         *     @type string   $id           Plugin ID, e.g. `w.org/plugins/[plugin-name]`.
         *     @type string   $slug         Plugin slug.
         *     @type string   $plugin       Plugin basename.
         *     @type string   $new_version  New plugin version.
         *     @type string   $url          Plugin URL.
         *     @type string   $package      Plugin update package URL.
         *     @type string[] $icons        An array of plugin icon URLs.
         *     @type string[] $banners      An array of plugin banner URLs.
         *     @type string[] $banners_rtl  An array of plugin RTL banner URLs.
         *     @type string   $requires     The version of WordPress which the plugin requires.
         *     @type string   $tested       The version of WordPress the plugin is tested against.
         *     @type string   $requires_php The version of PHP which the plugin requires.
         * }
         */
        do_action( "in_plugin_update_message-{$file}", $plugin_data, $response ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

        echo '</p></div></td></tr>';
    }
}

/**
 * Retrieves themes with updates available.
 *
 * @since 2.9.0
 *
 * @return array
 */
function get_theme_updates() {
    $current = get_site_transient( 'update_themes' );

    if ( ! isset( $current->response ) ) {
        return array();
    }

    $update_themes = array();

    foreach ( $current->response as $stylesheet => $data ) {
        $update_themes[ $stylesheet ]         = wp_get_theme( $stylesheet );
        $update_themes[ $stylesheet ]->update = $data;
    }

    return $update_themes;
}

/**
 * Adds a callback to display update information for themes with updates available.
 *
 * @since 3.1.0
 */
function wp_theme_update_rows() {
    if ( ! current_user_can( 'update_themes' ) ) {
        return;
    }

    $themes = get_site_transient( 'update_themes' );

    if ( isset( $themes->response ) && is_array( $themes->response ) ) {
        $themes = array_keys( $themes->response );

        foreach ( $themes as $theme ) {
            add_action( "after_theme_row_{$theme}", 'wp_theme_update_row', 10, 2 );
        }
    }
}

/**
 * Displays update information for a theme.
 *
 * @since 3.1.0
 *
 * @param string   $theme_key Theme stylesheet.
 * @param WP_Theme $theme     Theme object.
 * @return void|false
 */
function wp_theme_update_row( $theme_key, $theme ) {
    $current = get_site_transient( 'update_themes' );

    if ( ! isset( $current->response[ $theme_key ] ) ) {
        return false;
    }

    $response = $current->response[ $theme_key ];

    $details_url = add_query_arg(
        array(
            'TB_iframe' => 'true',
            'width'     => 1024,
            'height'    => 800,
        ),
        $current->response[ $theme_key ]['url']
    );

    /** @var WP_MS_Themes_List_Table $wp_list_table */
    $wp_list_table = _get_list_table( 'WP_MS_Themes_List_Table' );

    $active = $theme->is_allowed( 'network' ) ? ' active' : '';

    $requires_wp  = isset( $response['requires'] ) ? $response['requires'] : null;
    $requires_php = isset( $response['requires_php'] ) ? $response['requires_php'] : null;

    $compatible_wp  = is_wp_version_compatible( $requires_wp );
    $compatible_php = is_php_version_compatible( $requires_php );

    printf(
        '<tr class="plugin-update-tr%s" id="%s" data-slug="%s">' .
        '<td colspan="%s" class="plugin-update colspanchange">' .
        '<div class="update-message notice inline notice-warning notice-alt"><p>',
        $active,
        esc_attr( $theme->get_stylesheet() . '-update' ),
        esc_attr( $theme->get_stylesheet() ),
        $wp_list_table->get_column_count()
    );

    if ( $compatible_wp && $compatible_php ) {
        if ( ! current_user_can( 'update_themes' ) ) {
            printf(
                /* translators: 1: Theme name, 2: Details URL, 3: Additional link attributes, 4: Version number. */
                __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a>.' ),
                $theme['Name'],
                esc_url( $details_url ),
                sprintf(
                    'class="thickbox open-plugin-details-modal" aria-label="%s"',
                    /* translators: 1: Theme name, 2: Version number. */
                    esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $theme['Name'], $response['new_version'] ) )
                ),
                $response['new_version']
            );
        } elseif ( empty( $response['package'] ) ) {
            printf(
                /* translators: 1: Theme name, 2: Details URL, 3: Additional link attributes, 4: Version number. */
                __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a>. <em>Automatic update is unavailable for this theme.</em>' ),
                $theme['Name'],
                esc_url( $details_url ),
                sprintf(
                    'class="thickbox open-plugin-details-modal" aria-label="%s"',
                    /* translators: 1: Theme name, 2: Version number. */
                    esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $theme['Name'], $response['new_version'] ) )
                ),
                $response['new_version']
            );
        } else {
            printf(
                /* translators: 1: Theme name, 2: Details URL, 3: Additional link attributes, 4: Version number, 5: Update URL, 6: Additional link attributes. */
                __( 'There is a new version of %1$s available. <a href="%2$s" %3$s>View version %4$s details</a> or <a href="%5$s" %6$s>update now</a>.' ),
                $theme['Name'],
                esc_url( $details_url ),
                sprintf(
                    'class="thickbox open-plugin-details-modal" aria-label="%s"',
                    /* translators: 1: Theme name, 2: Version number. */
                    esc_attr( sprintf( __( 'View %1$s version %2$s details' ), $theme['Name'], $response['new_version'] ) )
                ),
                $response['new_version'],
                wp_nonce_url( self_admin_url( 'update.php?action=upgrade-theme&theme=' ) . $theme_key, 'upgrade-theme_' . $theme_key ),
                sprintf(
                    'class="update-link" aria-label="%s"',
                    /* translators: %s: Theme name. */
                    esc_attr( sprintf( _x( 'Update %s now', 'theme' ), $theme['Name'] ) )
                )
            );
        }
    } else {
        if ( ! $compatible_wp && ! $compatible_php ) {
            printf(
                /* translators: %s: Theme name. */
                __( 'There is a new version of %s available, but it does not work with your versions of WordPress and PHP.' ),
                $theme['Name']
            );
            if ( current_user_can( 'update_core' ) && current_user_can( 'update_php' ) ) {
                printf(
                    /* translators: 1: URL to WordPress Updates screen, 2: URL to Update PHP page. */
                    ' ' . __( '<a href="%1$s">Please update WordPress</a>, and then <a href="%2$s">learn more about updating PHP</a>.' ),
                    self_admin_url( 'update-core.php' ),
                    esc_url( wp_get_update_php_url() )
                );
                wp_update_php_annotation( '</p><p><em>', '</em>' );
            } elseif ( current_user_can( 'update_core' ) ) {
                printf(
                    /* translators: %s: URL to WordPress Updates screen. */
                    ' ' . __( '<a href="%s">Please update WordPress</a>.' ),
                    self_admin_url( 'update-core.php' )
                );
            } elseif ( current_user_can( 'update_php' ) ) {
                printf(
                    /* translators: %s: URL to Update PHP page. */
                    ' ' . __( '<a href="%s">Learn more about updating PHP</a>.' ),
                    esc_url( wp_get_update_php_url() )
                );
                wp_update_php_annotation( '</p><p><em>', '</em>' );
            }
        } elseif ( ! $compatible_wp ) {
            printf(
                /* translators: %s: Theme name. */
                __( 'There is a new version of %s available, but it does not work with your version of WordPress.' ),
                $theme['Name']
            );
            if ( current_user_can( 'update_core' ) ) {
                printf(
                    /* translators: %s: URL to WordPress Updates screen. */
                    ' ' . __( '<a href="%s">Please update WordPress</a>.' ),
                    self_admin_url( 'update-core.php' )
                );
            }
        } elseif ( ! $compatible_php ) {
            printf(
                /* translators: %s: Theme name. */
                __( 'There is a new version of %s available, but it does not work with your version of PHP.' ),
                $theme['Name']
            );
            if ( current_user_can( 'update_php' ) ) {
                printf(
                    /* translators: %s: URL to Update PHP page. */
                    ' ' . __( '<a href="%s">Learn more about updating PHP</a>.' ),
                    esc_url( wp_get_update_php_url() )
                );
                wp_update_php_annotation( '</p><p><em>', '</em>' );
            }
        }
    }

    /**
     * Fires at the end of the update message container in each
     * row of the themes list table.
     *
     * The dynamic portion of the hook name, `$theme_key`, refers to
     * the theme slug as found in the WordPress.org themes repository.
     *
     * @since 3.1.0
     *
     * @param WP_Theme $theme    The WP_Theme object.
     * @param array    $response {
     *     An array of metadata about the available theme update.
     *
     *     @type string $new_version New theme version.
     *     @type string $url         Theme URL.
     *     @type string $package     Theme update package URL.
     * }
     */
    do_action( "in_theme_update_message-{$theme_key}", $theme, $response ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

    echo '</p></div></td></tr>';
}

/**
 * Displays maintenance nag HTML message.
 *
 * @since 2.7.0
 *
 * @global int $upgrading
 *
 * @return void|false
 */
function maintenance_nag() {
    // Include an unmodified $wp_version.
    require ABSPATH . WPINC . '/version.php';
    global $upgrading;

    $nag = isset( $upgrading );

    if ( ! $nag ) {
        $failed = get_site_option( 'auto_core_update_failed' );
        /*
         * If an update failed critically, we may have copied over version.php but not other files.
         * In that case, if the installation claims we're running the version we attempted, nag.
         * This is serious enough to err on the side of nagging.
         *
         * If we simply failed to update before we tried to copy any files, then assume things are
         * OK if they are now running the latest.
         *
         * This flag is cleared whenever a successful update occurs using Core_Upgrader.
         */
        $comparison = ! empty( $failed['critical'] ) ? '>=' : '>';
        if ( isset( $failed['attempted'] ) && version_compare( $failed['attempted'], $wp_version, $comparison ) ) {
            $nag = true;
        }
    }

    if ( ! $nag ) {
        return false;
    }

    if ( current_user_can( 'update_core' ) ) {
        $msg = sprintf(
            /* translators: %s: URL to WordPress Updates screen. */
            __( 'An automated WordPress update has failed to complete - <a href="%s">please attempt the update again now</a>.' ),
            'update-core.php'
        );
    } else {
        $msg = __( 'An automated WordPress update has failed to complete! Please notify the site administrator.' );
    }

    wp_admin_notice(
        $msg,
        array(
            'type'               => 'warning',
            'additional_classes' => array( 'update-nag', 'inline' ),
            'paragraph_wrap'     => false,
        )
    );
}

/**
 * Prints the JavaScript templates for update admin notices.
 *
 * @since 4.6.0
 *
 * Template takes one argument with four values:
 *
 *     param {object} data {
 *         Arguments for admin notice.
 *
 *         @type string id        ID of the notice.
 *         @type string className Class names for the notice.
 *         @type string message   The notice's message.
 *         @type string type      The type of update the notice is for. Either 'plugin' or 'theme'.
 *     }
 */
function wp_print_admin_notice_templates() {
    ?>
    <script id="tmpl-wp-updates-admin-notice" type="text/html">
        <div <# if ( data.id ) { #>id="{{ data.id }}"<# } #> class="notice {{ data.className }}"><p>{{{ data.message }}}</p></div>
    </script>
    <script id="tmpl-wp-bulk-updates-admin-notice" type="text/html">
        <div id="{{ data.id }}" class="{{ data.className }} notice <# if ( data.errors ) { #>notice-error<# } else { #>notice-success<# } #>">
            <p>
                <# if ( data.successes ) { #>
                    <# if ( 1 === data.successes ) { #>
                        <# if ( 'plugin' === data.type ) { #>
                            <?php
                            /* translators: %s: Number of plugins. */
                            printf( __( '%s plugin successfully updated.' ), '{{ data.successes }}' );
                            ?>
                        <# } else { #>
                            <?php
                            /* translators: %s: Number of themes. */
                            printf( __( '%s theme successfully updated.' ), '{{ data.successes }}' );
                            ?>
                        <# } #>
                    <# } else { #>
                        <# if ( 'plugin' === data.type ) { #>
                            <?php
                            /* translators: %s: Number of plugins. */
                            printf( __( '%s plugins successfully updated.' ), '{{ data.successes }}' );
                            ?>
                        <# } else { #>
                            <?php
                            /* translators: %s: Number of themes. */
                            printf( __( '%s themes successfully updated.' ), '{{ data.successes }}' );
                            ?>
                        <# } #>
                    <# } #>
                <# } #>
                <# if ( data.errors ) { #>
                    <button class="button-link bulk-action-errors-collapsed" aria-expanded="false">
                        <# if ( 1 === data.errors ) { #>
                            <?php
                            /* translators: %s: Number of failed updates. */
                            printf( __( '%s update failed.' ), '{{ data.errors }}' );
                            ?>
                        <# } else { #>
                            <?php
                            /* translators: %s: Number of failed updates. */
                            printf( __( '%s updates failed.' ), '{{ data.errors }}' );
                            ?>
                        <# } #>
                        <span class="screen-reader-text">
                            <?php
                            /* translators: Hidden accessibility text. */
                            _e( 'Show more details' );
                            ?>
                        </span>
                        <span class="toggle-indicator" aria-hidden="true"></span>
                    </button>
                <# } #>
            </p>
            <# if ( data.errors ) { #>
                <ul class="bulk-action-errors hidden">
                    <# _.each( data.errorMessages, function( errorMessage ) { #>
                        <li>{{ errorMessage }}</li>
                    <# } ); #>
                </ul>
            <# } #>
        </div>
    </script>
    <?php
}

/**
 * Prints the JavaScript templates for update and deletion rows in list tables.
 *
 * @since 4.6.0
 *
 * The update template takes one argument with four values:
 *
 *     param {object} data {
 *         Arguments for the update row
 *
 *         @type string slug    Plugin slug.
 *         @type string plugin  Plugin base name.
 *         @type string colspan The number of table columns this row spans.
 *         @type string content The row content.
 *     }
 *
 * The delete template takes one argument with four values:
 *
 *     param {object} data {
 *         Arguments for the update row
 *
 *         @type string slug    Plugin slug.
 *         @type string plugin  Plugin base name.
 *         @type string name    Plugin name.
 *         @type string colspan The number of table columns this row spans.
 *     }
 */
function wp_print_update_row_templates() {
    ?>
    <script id="tmpl-item-update-row" type="text/template">
        <tr class="plugin-update-tr update" id="{{ data.slug }}-update" data-slug="{{ data.slug }}" <# if ( data.plugin ) { #>data-plugin="{{ data.plugin }}"<# } #>>
            <td colspan="{{ data.colspan }}" class="plugin-update colspanchange">
                {{{ data.content }}}
            </td>
        </tr>
    </script>
    <script id="tmpl-item-deleted-row" type="text/template">
        <tr class="plugin-deleted-tr inactive deleted" id="{{ data.slug }}-deleted" data-slug="{{ data.slug }}" <# if ( data.plugin ) { #>data-plugin="{{ data.plugin }}"<# } #>>
            <td colspan="{{ data.colspan }}" class="plugin-update colspanchange">
                <# if ( data.plugin ) { #>
                    <?php
                    printf(
                        /* translators: %s: Plugin name. */
                        _x( '%s was successfully deleted.', 'plugin' ),
                        '<strong>{{{ data.name }}}</strong>'
                    );
                    ?>
                <# } else { #>
                    <?php
                    printf(
                        /* translators: %s: Theme name. */
                        _x( '%s was successfully deleted.', 'theme' ),
                        '<strong>{{{ data.name }}}</strong>'
                    );
                    ?>
                <# } #>
            </td>
        </tr>
    </script>
    <?php
}

/**
 * Displays a notice when the user is in recovery mode.
 *
 * @since 5.2.0
 */
function wp_recovery_mode_nag() {
    if ( ! wp_is_recovery_mode() ) {
        return;
    }

    $url = wp_login_url();
    $url = add_query_arg( 'action', WP_Recovery_Mode::EXIT_ACTION, $url );
    $url = wp_nonce_url( $url, WP_Recovery_Mode::EXIT_ACTION );

    $message = sprintf(
        /* translators: %s: Recovery Mode exit link. */
        __( 'You are in recovery mode. This means there may be an error with a theme or plugin. To exit recovery mode, log out or use the Exit button. <a href="%s">Exit Recovery Mode</a>' ),
        esc_url( $url )
    );
    wp_admin_notice( $message, array( 'type' => 'info' ) );
}

/**
 * Checks whether auto-updates are enabled.
 *
 * @since 5.5.0
 *
 * @param string $type The type of update being checked: Either 'theme' or 'plugin'.
 * @return bool True if auto-updates are enabled for `$type`, false otherwise.
 */
function wp_is_auto_update_enabled_for_type( $type ) {
    if ( ! class_exists( 'WP_Automatic_Updater' ) ) {
        require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';
    }

    $updater = new WP_Automatic_Updater();
    $enabled = ! $updater->is_disabled();

    switch ( $type ) {
        case 'plugin':
            /**
             * Filters whether plugins auto-update is enabled.
             *
             * @since 5.5.0
             *
             * @param bool $enabled True if plugins auto-update is enabled, false otherwise.
             */
            return apply_filters( 'plugins_auto_update_enabled', $enabled );
        case 'theme':
            /**
             * Filters whether themes auto-update is enabled.
             *
             * @since 5.5.0
             *
             * @param bool $enabled True if themes auto-update is enabled, false otherwise.
             */
            return apply_filters( 'themes_auto_update_enabled', $enabled );
    }

    return false;
}

/**
 * Checks whether auto-updates are forced for an item.
 *
 * @since 5.6.0
 *
 * @param string    $type   The type of update being checked: Either 'theme' or 'plugin'.
 * @param bool|null $update Whether to update. The value of null is internally used
 *                          to detect whether nothing has hooked into this filter.
 * @param object    $item   The update offer.
 * @return bool True if auto-updates are forced for `$item`, false otherwise.
 */
function wp_is_auto_update_forced_for_item( $type, $update, $item ) {
    /** This filter is documented in wp-admin/includes/class-wp-automatic-updater.php */
    return apply_filters( "auto_update_{$type}", $update, $item );
}

/**
 * Determines the appropriate auto-update message to be displayed.
 *
 * @since 5.5.0
 *
 * @return string The update message to be shown.
 */
function wp_get_auto_update_message() {
    $next_update_time = wp_next_scheduled( 'wp_version_check' );

    // Check if the event exists.
    if ( false === $next_update_time ) {
        $message = __( 'Automatic update not scheduled. There may be a problem with WP-Cron.' );
    } else {
        $time_to_next_update = human_time_diff( (int) $next_update_time );

        // See if cron is overdue.
        $overdue = ( time() - $next_update_time ) > 0;

        if ( $overdue ) {
            $message = sprintf(
                /* translators: %s: Duration that WP-Cron has been overdue. */
                __( 'Automatic update overdue by %s. There may be a problem with WP-Cron.' ),
                $time_to_next_update
            );
        } else {
            $message = sprintf(
                /* translators: %s: Time until the next update. */
                __( 'Automatic update scheduled in %s.' ),
                $time_to_next_update
            );
        }
    }

    return $message;
}