描述:
在小工具管理界面上创建控制选项,以便用户对设置进行修改
参数:
$id
(integer | string) (必填) 侧边栏 ID.
默认值: None
$name
(string) (必填) 侧边栏名称.
默认值: None
$control_callback
(callback) (必填) 当侧边栏显示时运行.
默认值: None
$options
(array | string) (可选) 小工具设置选项
默认值: array()
Note: 可以传递其他参数以添加到小工具。
源文件:
/**
* Registers widget control callback for customizing options.
*
* The options contains the 'height', 'width', and 'id_base' keys. The 'height'
* option is never used. The 'width' option is the width of the fully expanded
* control form, but try hard to use the default width. The 'id_base' is for
* multi-widgets (widgets which allow multiple instances such as the text
* widget), an id_base must be provided. The widget id will end up looking like
* `{$id_base}-{$unique_number}`.
*
* @since 2.2.0
*
* @todo Document `$options` as a hash notation, re: WP_Widget::__construct() cross-reference.
* @todo `$params` parameter?
*
* @global array $wp_registered_widget_controls
* @global array $wp_registered_widget_updates
* @global array $wp_registered_widgets
* @global array $_wp_deprecated_widgets_callbacks
*
* @param int|string $id Sidebar ID.
* @param string $name Sidebar display name.
* @param callback $control_callback Run when sidebar is displayed.
* @param array|string $options Optional. Widget options. See description above. Default empty array.
*/
function wp_register_widget_control( $id, $name, $control_callback, $options = array() ) {
global $wp_registered_widget_controls, $wp_registered_widget_updates, $wp_registered_widgets, $_wp_deprecated_widgets_callbacks;
$id = strtolower($id);
$id_base = _get_widget_id_base($id);
if ( empty($control_callback) ) {
unset($wp_registered_widget_controls[$id]);
unset($wp_registered_widget_updates[$id_base]);
return;
}
if ( in_array($control_callback, $_wp_deprecated_widgets_callbacks, true) && !is_callable($control_callback) ) {
unset( $wp_registered_widgets[ $id ] );
return;
}
if ( isset($wp_registered_widget_controls[$id]) && !did_action( 'widgets_init' ) )
return;
$defaults = array('width' => 250, 'height' => 200 ); // height is never used
$options = wp_parse_args($options, $defaults);
$options['width'] = (int) $options['width'];
$options['height'] = (int) $options['height'];
$widget = array(
'name' => $name,
'id' => $id,
'callback' => $control_callback,
'params' => array_slice(func_get_args(), 4)
);
$widget = array_merge($widget, $options);
$wp_registered_widget_controls[$id] = $widget;
if ( isset($wp_registered_widget_updates[$id_base]) )
return;
if ( isset($widget['params'][0]['number']) )
$widget['params'][0]['number'] = -1;
unset($widget['width'], $widget['height'], $widget['name'], $widget['id']);
$wp_registered_widget_updates[$id_base] = $widget;
}