restore_current_blog()

restore_current_blog() 调用switch_to_blog（）后还原当前日志。

restore_current_blog()

说明（Description）

另见函数 switch_to_blog()

返回（Return）

（bool）成功时为真，如果我们已经在当前博客上，则为假。

源码（Source）

/**
 * Restore the current blog, after calling switch_to_blog()
 *
 * @see switch_to_blog()
 * @since MU
 *
 * @global wpdb            $wpdb
 * @global array           $_wp_switched_stack
 * @global int             $blog_id
 * @global bool            $switched
 * @global string          $table_prefix
 * @global WP_Object_Cache $wp_object_cache
 *
 * @return bool True on success, false if we're already on the current blog
 */
function restore_current_blog() {
	global $wpdb;
	if ( empty( $GLOBALS['_wp_switched_stack'] ) )
		return false;
	$blog = array_pop( $GLOBALS['_wp_switched_stack'] );
	if ( $GLOBALS['blog_id'] == $blog ) {
		/** This filter is documented in wp-includes/ms-blogs.php */
		do_action( 'switch_blog', $blog, $blog );
		// If we still have items in the switched stack, consider ourselves still 'switched'
		$GLOBALS['switched'] = ! empty( $GLOBALS['_wp_switched_stack'] );
		return true;
	}
	$wpdb->set_blog_id( $blog );
	$prev_blog_id = $GLOBALS['blog_id'];
	$GLOBALS['blog_id'] = $blog;
	$GLOBALS['table_prefix'] = $wpdb->get_blog_prefix();
	if ( function_exists( 'wp_cache_switch_to_blog' ) ) {
		wp_cache_switch_to_blog( $blog );
	} else {
		global $wp_object_cache;
		if ( is_object( $wp_object_cache ) && isset( $wp_object_cache->global_groups ) )
			$global_groups = $wp_object_cache->global_groups;
		else
			$global_groups = false;
		wp_cache_init();
		if ( function_exists( 'wp_cache_add_global_groups' ) ) {
			if ( is_array( $global_groups ) ) {
				wp_cache_add_global_groups( $global_groups );
			} else {
				wp_cache_add_global_groups( array( 'users', 'userlogins', 'usermeta', 'user_meta', 'useremail', 'userslugs', 'site-transient', 'site-options', 'site-lookup', 'blog-lookup', 'blog-details', 'rss', 'global-posts', 'blog-id-cache' ) );
			}
			wp_cache_add_non_persistent_groups( array( 'comment', 'counts', 'plugins' ) );
		}
	}
	if ( did_action( 'init' ) ) {
		wp_roles()->reinit();
		$current_user = wp_get_current_user();
		$current_user->for_blog( $blog );
	}
	/** This filter is documented in wp-includes/ms-blogs.php */
	do_action( 'switch_blog', $blog, $prev_blog_id );
	// If we still have items in the switched stack, consider ourselves still 'switched'
	$GLOBALS['switched'] = ! empty( $GLOBALS['_wp_switched_stack'] );
	return true;
}