WordPress/wp-admin/includes/ms-deprecated.php

<?php
/**
 * Multisite: Deprecated admin functions from past versions and WordPress MU
 *
 * These functions should not be used and will be removed in a later version.
 * It is suggested to use for the alternatives instead when available.
 *
 * @package WordPress
 * @subpackage Deprecated
 * @since 3.0.0
 */

/**
 * Outputs the WPMU menu.
 *
 * @deprecated 3.0.0
 */
function wpmu_menu() {
	_deprecated_function( __FUNCTION__, '3.0.0' );
	// Deprecated. See #11763.
}

/**
 * Determines if the available space defined by the admin has been exceeded by the user.
 *
 * @deprecated 3.0.0 Use is_upload_space_available()
 * @see is_upload_space_available()
 */
function wpmu_checkAvailableSpace() {
	_deprecated_function( __FUNCTION__, '3.0.0', 'is_upload_space_available()' );

	if ( ! is_upload_space_available() ) {
		wp_die( sprintf(
			/* translators: %s: Allowed space allocation. */
			__( 'Sorry, you have used your space allocation of %s. Please delete some files to upload more files.' ),
			size_format( get_space_allowed() * MB_IN_BYTES )
		) );
	}
}

/**
 * WPMU options.
 *
 * @deprecated 3.0.0
 */
function mu_options( $options ) {
	_deprecated_function( __FUNCTION__, '3.0.0' );
	return $options;
}

/**
 * Deprecated functionality for activating a network-only plugin.
 *
 * @deprecated 3.0.0 Use activate_plugin()
 * @see activate_plugin()
 */
function activate_sitewide_plugin() {
	_deprecated_function( __FUNCTION__, '3.0.0', 'activate_plugin()' );
	return false;
}

/**
 * Deprecated functionality for deactivating a network-only plugin.
 *
 * @deprecated 3.0.0 Use deactivate_plugin()
 * @see deactivate_plugin()
 */
function deactivate_sitewide_plugin( $plugin = false ) {
	_deprecated_function( __FUNCTION__, '3.0.0', 'deactivate_plugin()' );
}

/**
 * Deprecated functionality for determining if the current plugin is network-only.
 *
 * @deprecated 3.0.0 Use is_network_only_plugin()
 * @see is_network_only_plugin()
 */
function is_wpmu_sitewide_plugin( $file ) {
	_deprecated_function( __FUNCTION__, '3.0.0', 'is_network_only_plugin()' );
	return is_network_only_plugin( $file );
}

/**
 * Deprecated functionality for getting themes network-enabled themes.
 *
 * @deprecated 3.4.0 Use WP_Theme::get_allowed_on_network()
 * @see WP_Theme::get_allowed_on_network()
 */
function get_site_allowed_themes() {
	_deprecated_function( __FUNCTION__, '3.4.0', 'WP_Theme::get_allowed_on_network()' );
	return array_map( 'intval', WP_Theme::get_allowed_on_network() );
}

/**
 * Deprecated functionality for getting themes allowed on a specific site.
 *
 * @deprecated 3.4.0 Use WP_Theme::get_allowed_on_site()
 * @see WP_Theme::get_allowed_on_site()
 */
function wpmu_get_blog_allowedthemes( $blog_id = 0 ) {
	_deprecated_function( __FUNCTION__, '3.4.0', 'WP_Theme::get_allowed_on_site()' );
	return array_map( 'intval', WP_Theme::get_allowed_on_site( $blog_id ) );
}

/**
 * Deprecated functionality for determining whether a file is deprecated.
 *
 * @deprecated 3.5.0
 */
function ms_deprecated_blogs_file() {}

if ( ! function_exists( 'install_global_terms' ) ) :
	/**
	 * Install global terms.
	 *
	 * @since 3.0.0
	 * @since 6.1.0 This function no longer does anything.
	 * @deprecated 6.1.0
	 */
	function install_global_terms() {
		_deprecated_function( __FUNCTION__, '6.1.0' );
	}
endif;

/**
 * Synchronizes category and post tag slugs when global terms are enabled.
 *
 * @since 3.0.0
 * @since 6.1.0 This function no longer does anything.
 * @deprecated 6.1.0
 *
 * @param WP_Term|array $term     The term.
 * @param string        $taxonomy The taxonomy for `$term`.
 * @return WP_Term|array Always returns `$term`.
 */
function sync_category_tag_slugs( $term, $taxonomy ) {
	_deprecated_function( __FUNCTION__, '6.1.0' );

	return $term;
}