felixarntz/global-admin

<?php
/**
 * These functions are needed to load WordPress.
 *
 * @package WPGlobalAdmin
 * @since 1.0.0
 */

if ( ! function_exists( 'is_multinetwork' ) ) :

    /**
     * If this is a multinetwork setup.
     *
     * @since 1.0.0
     *
     * @return bool True if a multinetwork, false otherwise.
     */
    function is_multinetwork() {
        if ( ! is_multisite() ) {
            return false;
        }

        if ( defined( 'MULTINETWORK' ) ) {
            return MULTINETWORK;
        }

        $is_multinetwork = get_global_transient( 'is_multinetwork' );
        if ( false === $is_multinetwork ) {
            $networks = get_networks( array(
                'fields' => 'ids',
                'number' => 2,
            ) );

            // Something other than booleans must be used here.
            $is_multinetwork = count( $networks ) > 1 ? 1 : 0;

            set_global_transient( 'is_multinetwork', $is_multinetwork, WEEK_IN_SECONDS );
        }

        return (bool) $is_multinetwork;
    }

endif;

if ( ! function_exists( 'is_global_admin' ) ) :

    /**
     * Whether the current request is for the global administrative interface, e.g. `/wp-admin/global/`.
     *
     * Does not check if the user is a global administrator. Use is_global_administrator() for that.
     *
     * @since 1.0.0
     *
     * @return bool True if inside WordPress global administration panel.
     */
    function is_global_admin() {
        // Unfortunately it's not possible to use the $current_screen global here since it cannot be adjusted.
        if ( defined( 'WP_GLOBAL_ADMIN' ) ) {
            return (bool) WP_GLOBAL_ADMIN;
        }

        return false;
    }

endif;