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<?php

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/**

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* Multisite upgrade administration panel.

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* @package WordPress

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* @subpackage Multisite

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* @since 3.0.0

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/** Load WordPress Administration Bootstrap */

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require_once __DIR__ . '/admin.php';

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require_once ABSPATH . WPINC . '/http.php';

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$title = __( 'Upgrade Network' );

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$parent_file = 'upgrade.php';

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get_current_screen()->add_help_tab(

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array(

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'id' => 'overview',

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'title' => __( 'Overview' ),

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'content' =>

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'<p>' . __( 'Only use this screen once you have updated to a new version of WordPress through Updates/Available Updates (via the Network Administration navigation menu or the Toolbar). Clicking the Upgrade Network button will step through each site in the network, five at a time, and make sure any database updates are applied.' ) . '</p>' .

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'<p>' . __( 'If a version update to core has not happened, clicking this button won’t affect anything.' ) . '</p>' .

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'<p>' . __( 'If this process fails for any reason, users logging in to their sites will force the same update.' ) . '</p>',

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)

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);

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get_current_screen()->set_help_sidebar(

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'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .

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'<p>' . __( '<a href="https://wordpress.org/support/article/network-admin-updates-screen/">Documentation on Upgrade Network</a>' ) . '</p>' .

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'<p>' . __( '<a href="https://wordpress.org/support/">Support</a>' ) . '</p>'

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);

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require_once ABSPATH . 'wp-admin/admin-header.php';

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if ( ! current_user_can( 'upgrade_network' ) ) {

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wp_die( __( 'Sorry, you are not allowed to access this page.' ), 403 );

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}

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echo '<div class="wrap">';

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echo '<h1>' . __( 'Upgrade Network' ) . '</h1>';

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$action = isset( $_GET['action'] ) ? $_GET['action'] : 'show';

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switch ( $action ) {

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case 'upgrade':

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$n = ( isset( $_GET['n'] ) ) ? (int) $_GET['n'] : 0;

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if ( $n < 5 ) {

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/**

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* @global int $wp_db_version WordPress database version.

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global $wp_db_version;

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update_site_option( 'wpmu_upgrade_site', $wp_db_version );

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}

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$site_ids = get_sites(

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array(

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'spam' => 0,

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'deleted' => 0,

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'archived' => 0,

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'network_id' => get_current_network_id(),

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'number' => 5,

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'offset' => $n,

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'fields' => 'ids',

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'order' => 'DESC',

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'orderby' => 'id',

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'update_site_meta_cache' => false,

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)

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);

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if ( empty( $site_ids ) ) {

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echo '<p>' . __( 'All done!' ) . '</p>';

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break;

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}

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echo '<ul>';

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foreach ( (array) $site_ids as $site_id ) {

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switch_to_blog( $site_id );

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$siteurl = site_url();

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$upgrade_url = admin_url( 'upgrade.php?step=upgrade_db' );

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restore_current_blog();

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echo "<li>$siteurl</li>";

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$response = wp_remote_get(

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$upgrade_url,

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array(

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'timeout' => 120,

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'httpversion' => '1.1',

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'sslverify' => false,

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)

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);

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if ( is_wp_error( $response ) ) {

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wp_die(

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sprintf(

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/* translators: 1: Site URL, 2: Server error message. */

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__( 'Warning! Problem updating %1$s. Your server may not be able to connect to sites running on it. Error message: %2$s' ),

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$siteurl,

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'<em>' . $response->get_error_message() . '</em>'

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)

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);

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}

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/**

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* Fires after the Multisite DB upgrade for each site is complete.

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* @since MU (3.0.0)

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* @param array|WP_Error $response The upgrade response array or WP_Error on failure.

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do_action( 'after_mu_upgrade', $response );

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/**

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* Fires after each site has been upgraded.

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* @since MU (3.0.0)

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* @param int $site_id The Site ID.

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do_action( 'wpmu_upgrade_site', $site_id );

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}

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echo '</ul>';

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?><p><?php _e( 'If your browser doesn’t start loading the next page automatically, click this link:' ); ?> <a class="button" href="upgrade.php?action=upgrade&n=<?php echo ( $n + 5 ); ?>"><?php _e( 'Next Sites' ); ?></a></p>

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<!--

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function nextpage() {

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location.href = "upgrade.php?action=upgrade&n=<?php echo ( $n + 5 ); ?>";

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}

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setTimeout( "nextpage()", 250 );

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//-->

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</script>

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<?php

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break;

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case 'show':

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default:

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if ( (int) get_site_option( 'wpmu_upgrade_site' ) !== $GLOBALS['wp_db_version'] ) :

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<?php endif; ?>

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<?php

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/**

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* Fires before the footer on the network upgrade screen.

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* @since MU (3.0.0)

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do_action( 'wpmu_upgrade_page' );

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break;

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}

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</div>

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<?php require_once ABSPATH . 'wp-admin/admin-footer.php'; ?>

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