function global_home_url($path = '', $scheme = null)
 {
     if (!is_multinetwork()) {
         return network_home_url($path, $scheme);
     }
     $main_site_id = get_main_network_id();
     $main_site = get_network($main_site_id);
     $orig_scheme = $scheme;
     if (!in_array($scheme, array('http', 'https', 'relative'))) {
         $scheme = is_ssl() && !is_admin() ? 'https' : 'http';
     }
     if ('relative' == $scheme) {
         $url = $main_site->path;
     } else {
         $url = set_url_scheme('http://' . $main_site->domain . $main_site->path, $scheme);
     }
     if ($path && is_string($path)) {
         $url .= ltrim($path, '/');
     }
     /**
      * Filters the global home URL.
      *
      * @since 1.0.0
      *
      * @param string      $url         The complete global home URL including scheme and path.
      * @param string      $path        Path relative to the global home URL. Blank string
      *                                 if no path is specified.
      * @param string|null $orig_scheme Scheme to give the URL context. Accepts 'http', 'https',
      *                                 'relative' or null.
      */
     return apply_filters('global_home_url', $url, $path, $orig_scheme);
 }

/**
 * Determine whether a network is the main network of the Multisite install.
 *
 * @since 3.7.0
 *
 * @param int $network_id Optional. Network ID to test. Defaults to current network.
 * @return bool True if $network_id is the main network, or if not running Multisite.
 */
function is_main_network($network_id = null)
{
    if (!is_multisite()) {
        return true;
    }
    $current_network_id = (int) get_current_site()->id;
    if (null === $network_id) {
        $network_id = $current_network_id;
    }
    $network_id = (int) $network_id;
    return $network_id === get_main_network_id();
}

/**
 * Get the main network
 *
 * Uses the same logic as {@see is_main_network}, but returns the network object
 * instead.
 *
 * @return stdClass|null
 */
function wp_get_main_network()
{
    global $wpdb;
    if (!is_multisite()) {
        return null;
    }
    // Added in 4.3.0
    if (function_exists('get_main_network_id')) {
        $primary_network_id = get_main_network_id();
        // 4.2.0
    } else {
        // Override
        if (defined('PRIMARY_NETWORK_ID')) {
            return wp_get_network((int) PRIMARY_NETWORK_ID);
        }
        // Check cache
        $primary_network_id = (int) wp_cache_get('primary_network_id', 'site-options');
        if (!empty($primary_network_id)) {
            return wp_get_network($primary_network_id);
        }
        $primary_network_id = (int) $wpdb->get_var("SELECT id FROM {$wpdb->site} ORDER BY id LIMIT 1");
        wp_cache_add('primary_network_id', $primary_network_id, 'site-options');
    }
    return wp_get_network($primary_network_id);
}

/**
 * Retrieves the current network ID.
 *
 * @since 4.6.0
 *
 * @return int The ID of the current network.
 */
function get_current_network_id()
{
    if (!is_multisite()) {
        return 1;
    }
    $current_network = get_network();
    if (!isset($current_network->id)) {
        return get_main_network_id();
    }
    return absint($current_network->id);
}

    }
    die('WordPress Core directory could not be detected.');
}
define('WP_GLOBAL_ADMIN', true);
/** Load WordPress Administration Bootstrap */
require_once _ga_detect_abspath() . '/wp-admin/admin.php';
// This would be it if it was part of Core.
//require_once( dirname( dirname( __FILE__ ) ) . '/admin.php' );
if (!is_multisite()) {
    wp_die(__('Multisite support is not enabled.'));
}
if (!is_multinetwork()) {
    wp_die(__('Multinetwork support is not enabled.', 'global-admin'));
}
$current_network = get_network();
$main_network_id = get_main_network_id();
$main_network = get_network($main_network_id);
$redirect_global_admin_request = 0 !== strcasecmp($current_network->domain, $main_network->domain) || 0 !== strcasecmp($current_network->path, $main_network->path);
/**
 * Filters whether to redirect the request to the Global Admin.
 *
 * @since 1.0.0
 *
 * @param bool $redirect_global_admin_request Whether the request should be redirected.
 */
$redirect_global_admin_request = apply_filters('redirect_global_admin_request', $redirect_global_admin_request);
if ($redirect_global_admin_request) {
    wp_redirect(global_admin_url());
    exit;
}
unset($current_network);

 /**
  * Get the main network
  *
  * Uses the same logic as {@see is_main_network}, but returns the network object
  * instead.
  *
  * @return stdClass|null
  */
 function wp_get_main_network()
 {
     // Bail if not multisite
     if (!is_multisite()) {
         return null;
     }
     // Return main network ID
     return wp_get_network(get_main_network_id());
 }

 function test_get_main_network_id_filtered()
 {
     add_filter('get_main_network_id', array($this, '_get_main_network_id'));
     $this->assertEquals(3, get_main_network_id());
     remove_filter('get_main_network_id', array($this, '_get_main_network_id'));
 }

    /**
     * Output the delete multiple networks page
     *
     * @since 2.0.0
     */
    private function page_delete_networks()
    {
        // Get posted networks
        $network_id = get_main_network_id();
        $all_networks = isset($_POST['all_networks']) ? array_map('absint', $_POST['all_networks']) : array();
        // Prevent primary network from being deleted
        $all_networks = array_diff($all_networks, array($network_id));
        // Query for networks
        $networks = get_networks(array('network__in' => $all_networks));
        // Bail if no networks
        if (empty($networks)) {
            wp_die(esc_html__('You have selected an invalid network or networks for deletion', 'wp-multi-network'));
        }
        // Ensure each network is valid
        foreach ($networks as $network) {
            if (!get_network($network)) {
                wp_die(esc_html__('You have selected an invalid network for deletion.', 'wp-multi-network'));
            }
        }
        // Query for sites in selected networks
        $sites = get_sites(array('network__in' => $all_networks));
        ?>

		<div class="wrap">
			<h1><?php 
        esc_html_e('Networks', 'wp-multi-network');
        ?>
</h1>
			<h3><?php 
        esc_html_e('Delete Multiple Networks', 'wp-multi-network');
        ?>
</h3>
			<form method="post" action="<?php 
        echo esc_url($this->admin_url());
        ?>
">
				<?php 
        if (!empty($sites)) {
            ?>

					<div class="error inline">
						<h3><?php 
            esc_html_e('You have selected the following networks for deletion', 'wp-multi-network');
            ?>
:</h3>
						<ul>
							<?php 
            foreach ($networks as $deleted_network) {
                ?>
								<li><input type="hidden" name="deleted_networks[]" value="<?php 
                echo esc_attr($deleted_network->id);
                ?>
"><?php 
                echo esc_html($deleted_network->domain . $deleted_network->path);
                ?>
</li>
							<?php 
            }
            ?>
						</ul>
						<p><?php 
            // Messaging
            wp_should_rescue_orphaned_sites() ? esc_html_e('One or more of these networks has existing sites. Deleting these networks will orphan these sites.', 'wp-multi-network') : esc_html_e('One or more of these networks has existing sites. Deleting these networks will permanently delete these sites.', 'wp-multi-network');
            ?>
</p>
						<p>
							<label for="override"><?php 
            esc_html_e('Please confirm that you still want to delete these networks', 'wp-multi-network');
            ?>
:</label>
							<input type="checkbox" name="override" id="override">
						</p>
					</div>

				<?php 
        } else {
            ?>

					<div id="message inline">
						<h3><?php 
            esc_html_e('You have selected the following networks for deletion', 'wp-multi-network');
            ?>
:</h3>
						<ul><?php 
            foreach ($networks as $deleted_network) {
                ?>
<li><input type="hidden" name="deleted_networks[]" value="<?php 
                echo esc_attr($deleted_network->id);
                ?>
"><?php 
                echo esc_html($deleted_network->domain . $deleted_network->path);
                ?>
</li><?php 
            }
            ?>
//.........这里部分代码省略.........

    function global_step2()
    {
        $main_network_id = get_main_network_id();
        $main_network = get_network($main_network_id);
        $hostname = $main_network->domain;
        $abspath_fix = str_replace('\\', '/', ABSPATH);
        $location_of_wp_config = $abspath_fix;
        if (!file_exists(ABSPATH . 'wp-config.php') && file_exists(dirname(ABSPATH) . '/wp-config.php')) {
            $location_of_wp_config = dirname($abspath_fix);
        }
        $location_of_wp_config = trailingslashit($location_of_wp_config);
        if ($_POST || !is_multinetwork()) {
            ?>
		<h3><?php 
            esc_html_e('Enabling the Multinetwork');
            ?>
</h3>
		<p><?php 
            _e('Complete the following steps to enable the global admin panel for creating multiple networks.');
            ?>
</p>
		<div class="updated inline"><p>
			<?php 
            printf(__('We recommend you back up your existing %s file.', 'global-admin'), '<code>wp-config.php</code>');
            ?>
		</p></div>
		<?php 
        } else {
            ?>
		<p><?php 
            _e('The original configuration steps are shown here for reference.', 'global-admin');
            ?>
</p>
		<?php 
        }
        ?>
	<ol>
		<li>
			<p><?php 
        printf(__('Add the following to your %1$s file in %2$s <strong>above</strong> the line reading %3$s:', 'global-admin'), '<code>wp-config.php</code>', '<code>' . $location_of_wp_config . '</code>', '<code>/* ' . __('That&#8217;s all, stop editing! Happy blogging.', 'global-admin') . ' */</code>');
        ?>
</p>
			<textarea class="code" readonly="readonly" cols="100" rows="2">
define('MULTINETWORK', true);
</textarea>
		</li>
	</ol>
	<?php 
        if (!is_multinetwork()) {
            ?>
		<p><?php 
            _e('Once you complete these steps, your multinetwork is enabled and configured.', 'global-admin');
            ?>
</p>
	<?php 
        }
    }