add_help_tab( array(
'id' => 'overview',
'title' => __('Overview'),
'content' =>
'' . __('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.') . '
' .
'' . __('If a version update to core has not happened, clicking this button won’t affect anything.') . '
' .
'' . __('If this process fails for any reason, users logging in to their sites will force the same update.') . '
'
) );
get_current_screen()->set_help_sidebar(
'' . __('For more information:') . '
' .
'' . __('Documentation on Upgrade Network') . '
' .
'' . __('Support Forums') . '
'
);
require_once( ABSPATH . 'wp-admin/admin-header.php' );
if ( ! current_user_can( 'upgrade_network' ) ) {
wp_die( __( 'Sorry, you are not allowed to access this page.' ), 403 );
}
echo '';
echo '
' . __( 'Upgrade Network' ) . '
';
$action = isset($_GET['action']) ? $_GET['action'] : 'show';
switch ( $action ) {
case "upgrade":
$n = ( isset($_GET['n']) ) ? intval($_GET['n']) : 0;
if ( $n < 5 ) {
/**
* @global string $wp_db_version
*/
global $wp_db_version;
update_site_option( 'wpmu_upgrade_site', $wp_db_version );
}
$site_ids = get_sites( array(
'spam' => 0,
'deleted' => 0,
'archived' => 0,
'network_id' => get_current_network_id(),
'number' => 5,
'offset' => $n,
'fields' => 'ids',
'order' => 'DESC',
'orderby' => 'id',
) );
if ( empty( $site_ids ) ) {
echo '
' . __( 'All done!' ) . '
';
break;
}
echo "
";
foreach ( (array) $site_ids as $site_id ) {
switch_to_blog( $site_id );
$siteurl = site_url();
$upgrade_url = admin_url( 'upgrade.php?step=upgrade_db' );
restore_current_blog();
echo "- $siteurl
";
$response = wp_remote_get( $upgrade_url, array(
'timeout' => 120,
'httpversion' => '1.1',
'sslverify' => false,
) );
if ( is_wp_error( $response ) ) {
wp_die( sprintf(
/* translators: 1: site url, 2: server error message */
__( 'Warning! Problem updating %1$s. Your server may not be able to connect to sites running on it. Error message: %2$s' ),
$siteurl,
'' . $response->get_error_message() . ''
) );
}
/**
* Fires after the Multisite DB upgrade for each site is complete.
*
* @since MU
*
* @param array|WP_Error $response The upgrade response array or WP_Error on failure.
*/
do_action( 'after_mu_upgrade', $response );
/**
* Fires after each site has been upgraded.
*
* @since MU
*
* @param int $site_id The Site ID.
*/
do_action( 'wpmu_upgrade_site', $site_id );
}
echo "
";
?>