描述:
为侧边栏注册一个小工具
用法:
<?php
wp_register_sidebar_widget(
$id,
$name,
$output_callback,
$options,
$params,
...
);
?>
参数:
$id
(int/string) (必填) 要注册的小工具的ID.
默认值: None
$name
(string) (必填) 要注册的小工具的的标题.
默认值: None
$output_callback
(callback) (必填) 在小工具被调用时运行.
默认值: None
$options
(array/string) (可选) 小工具设置选项.
默认值: None
$params,...
(mixed) (可选) 要添加到小小工具的参数.
默认值: None
源文件:
/**
* Register an instance of a widget.
*
* The default widget option is 'classname' that can be overridden.
*
* The function can also be used to un-register widgets when `$output_callback`
* parameter is an empty string.
*
* @since 2.2.0
*
* @global array $wp_registered_widgets Uses stored registered widgets.
* @global array $wp_register_widget_defaults Retrieves widget defaults.
* @global array $wp_registered_widget_updates
* @global array $_wp_deprecated_widgets_callbacks
*
* @param int|string $id Widget ID.
* @param string $name Widget display title.
* @param callback $output_callback Run when widget is called.
* @param array $options {
* Optional. An array of supplementary widget options for the instance.
*
* @type string $classname Class name for the widget's HTML container. Default is a shortened
* version of the output callback name.
* @type string $description Widget description for display in the widget administration
* panel and/or theme.
* }
*/
function wp_register_sidebar_widget( $id, $name, $output_callback, $options = array() ) {
global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_widget_updates, $_wp_deprecated_widgets_callbacks;
$id = strtolower($id);
if ( empty($output_callback) ) {
unset($wp_registered_widgets[$id]);
return;
}
$id_base = _get_widget_id_base($id);
if ( in_array($output_callback, $_wp_deprecated_widgets_callbacks, true) && !is_callable($output_callback) ) {
unset( $wp_registered_widget_controls[ $id ] );
unset( $wp_registered_widget_updates[ $id_base ] );
return;
}
$defaults = array('classname' => $output_callback);
$options = wp_parse_args($options, $defaults);
$widget = array(
'name' => $name,
'id' => $id,
'callback' => $output_callback,
'params' => array_slice(func_get_args(), 4)
);
$widget = array_merge($widget, $options);
if ( is_callable($output_callback) && ( !isset($wp_registered_widgets[$id]) || did_action( 'widgets_init' ) ) ) {
/**
* Fires once for each registered widget.
*
* @since 3.0.0
*
* @param array $widget An array of default widget arguments.
*/
do_action( 'wp_register_sidebar_widget', $widget );
$wp_registered_widgets[$id] = $widget;
}
}