描述：

批量注册并创建侧边栏

用法：

 <?php register_sidebars( $number, $args ); ?>

参数：

number

(integer) (可选) 要创建的侧边栏个数

默认值: 1

args

(string/array) (可选) 基于“name”和“id”值生成侧边栏。

默认值: None

• name - 侧边栏名称
• id - 侧边栏id。（注意：“%d”自动添加到第一个后提供的“id”值中；例如，“侧边栏”、“侧边栏-2”、“侧边栏-3”等）
• description -侧边栏的内容/位置的文本描述。显示在小工具管理界面上。（从2.9开始）（默认值：空）
• class - 要分配给小部件HTML的CSS类名（默认值：空）.
• before_widget - HTML放在每个小部件之前。
• after_widget -HTML放在每个小部件之后。
• before_title - 在每个标题前添加的HTML。
• after_title - 在每个标题后添加的HTML。

源文件：

/**
 * Creates multiple sidebars.
 *
 * If you wanted to quickly create multiple sidebars for a theme or internally.
 * This function will allow you to do so. If you don't pass the 'name' and/or
 * 'id' in `$args`, then they will be built for you.
 *
 * @since 2.2.0
 *
 * @see register_sidebar() The second parameter is documented by register_sidebar() and is the same here.
 *
 * @global array $wp_registered_sidebars
 *
 * @param int          $number Optional. Number of sidebars to create. Default 1.
 * @param array|string $args {
 *     Optional. Array or string of arguments for building a sidebar.
 *
 *     @type string $id   The base string of the unique identifier for each sidebar. If provided, and multiple
 *                        sidebars are being defined, the id will have "-2" appended, and so on.
 *                        Default 'sidebar-' followed by the number the sidebar creation is currently at.
 *     @type string $name The name or title for the sidebars displayed in the admin dashboard. If registering
 *                        more than one sidebar, include '%d' in the string as a placeholder for the uniquely
 *                        assigned number for each sidebar.
 *                        Default 'Sidebar' for the first sidebar, otherwise 'Sidebar %d'.
 * }
 */
function register_sidebars( $number = 1, $args = array() ) {
	global $wp_registered_sidebars;
	$number = (int) $number;

	if ( is_string($args) )
		parse_str($args, $args);

	for ( $i = 1; $i <= $number;="" $i++="" )="" {="" $_args="$args;" if="" (="" $number=""> 1 )
			$_args['name'] = isset($args['name']) ? sprintf($args['name'], $i) : sprintf(__('Sidebar %d'), $i);
		else
			$_args['name'] = isset($args['name']) ? $args['name'] : __('Sidebar');

		// Custom specified ID's are suffixed if they exist already.
		// Automatically generated sidebar names need to be suffixed regardless starting at -0
		if ( isset($args['id']) ) {
			$_args['id'] = $args['id'];
			$n = 2; // Start at -2 for conflicting custom ID's
			while ( isset($wp_registered_sidebars[$_args['id']]) )
				$_args['id'] = $args['id'] . '-' . $n++;
		} else {
			$n = count($wp_registered_sidebars);
			do {
				$_args['id'] = 'sidebar-' . ++$n;
			} while ( isset($wp_registered_sidebars[$_args['id']]) );
		}
		register_sidebar($_args);
	}
}