WordPress - WP_Widget:致命错误:Uncaught ArgumentCountError:太少的参数

Question

我是自定义wordpress小部件创建的新手，我正在尝试创建一个。我在wp-content> plugins> custom-widgets> my-custom-widget.php创建了我的小部件。

这是我的代码

if(!class_exists("MyCustomWidget")){

class MyCustomWidget extends WP_Widget{

public function __constructor(){
parent::WP_Widget(false,"My custom Widget");
}

public function form($instance){
?>
<p>
<label>Tilte:</label>
<input type="text"/>

</p>
<?php
}
}

function register_my_widget(){
register_widget("MyCustomWidget");
}

add_action("widgets_init", "register_my_widget");
}

当我试图激活它时，我得到wordpress失败页面，特别是以下内容。怎么了?

Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 
passed in F:DownloadsWorpressWordpress Localapache2htdocsstorewordpresswp-includesclass-wp-
widget-factory.php on line 61 and at least 2 expected in F:DownloadsWorpressWordpress 
Localapache2htdocsstorewordpresswp-includesclass-wp-widget.php:162 Stack trace: #0 
F:DownloadsWorpressWordpress Localapache2htdocsstorewordpresswp-includesclass-wp-widget-
factory.php(61): WP_Widget->__construct() #1 F:DownloadsWorpressWordpress 
Localapache2htdocsstorewordpresswp-includeswidgets.php(115): WP_Widget_Factory->register() #2 
F:DownloadsWorpressWordpress Localapache2htdocsstorewordpresswp-contentpluginscustom-widgetwp-
custom-widget.php(34): register_widget() #3 F:DownloadsWorpressWordpress 
Localapache2htdocsstorewordpresswp-includesclass-wp-hook.php(287): register_my_widget() #4 
F:DownloadsWorpressWordpress Localapache2htdocsstorewordpresswp-includesclass-wp-hook.php(311): 
WP in F:DownloadsWorpressWordpress Localapache2htdocsstorewordpresswp-includesclass-wp-
widget.php on line 162

Answer 1

请参阅来自wordpress.stackexchange.com的答案，以获得完整的正确小部件示例。

这个问题中的代码有几个问题:

1. 是function __construct()，不是function __constructor()。
2. 在rich的回答中详细说明了父呼叫应该是parent::__construct(..)。例如:parent::__construct('', 'Widget name');

Answer 2

在你的构造函数中，你需要传递两个参数…像这样:

public function __constructor(){
parent::__construct('my_custom_widget',v__('My Custom Widget', 'my_text_domain'));
}

WordPress文档:https://developer.wordpress.org/reference/classes/wp_widget/__construct/