将变量传递给扩展类 [英] Pass variables to extended class
问题描述
我使用相同的代码在WordPress中创建一个小部件。我使用的代码已经扩展了一个类。它工作得很好。
I use the same code to create a widget in WordPress. The code I use extends a class already. It works fine.
而不是复制/粘贴这每次我需要一个新的小部件,这是有意义的,使我可以调用它的一些参数,并得到它工作。
Rather than copy/paste this every time I need a new widget it makes sense to make this so I can call it with a number of parameters and get it to work.
我有4个变量。我不熟悉如何做这个与类。如果这是一个函数,我会像下面这样调用它
I have 4 variables to pass. I'm not familiar with how to do this with classes. If this was a function I would call it like
function function_name($ functionname,$ classname,$ description,$ filename)
function function_name($functionname, $classname, $description, $filename)
当我扩展一个类时,如何获得类似的结果。你可以看到上面的四个变量。最终结果是在WordPress中创建一个小部件项目,当加载时从特定位置添加一个文件。
How can I achieve a similar results when I extend a class. You can see the four variables above. The end result is to create a widget item in WordPress which when loaded adds a file from a specific location.
虽然这是在WordPress中使用我决定发布on stackoverflow而不是wp-stackoverflow,因为这更常见地涉及类。
Although this is used in WordPress I decided to post on stackoverflow and not wp-stackoverflow because this relates to classes more generally.
class exampleWidget extends WP_Widget
{
function exampleWidget()
{
$widget_ops = array('classname' => 'exampleWidget', 'description' => 'Description here...' );
$this->WP_Widget('exampleWidget', 'Description - Adds Switch', $widget_ops);
}
function form($instance)
{
$instance = wp_parse_args( (array) $instance, array( 'title' => '' ) );
$title = $instance['title'];
?>
<p><label for="<?php echo $this->get_field_id('title'); ?>">Title: <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo attribute_escape($title); ?>" /></label></p>
<?php
}
function update($new_instance, $old_instance)
{
$instance = $old_instance;
$instance['title'] = $new_instance['title'];
return $instance;
}
function widget($args, $instance)
{
extract($args, EXTR_SKIP);
echo $before_widget;
$title = empty($instance['title']) ? ' ' : apply_filters('widget_title', $instance['title']);
if (!empty($title))
echo $before_title . $title . $after_title;;
// widget code here
get_template_part( 'includes/widget/widget-name' );
echo $after_widget;
}
}
add_action( 'widgets_init', create_function('', 'return register_widget("exampleWidget");') );
推荐答案
也许你需要这样的东西吗?
Maybe you need something like this?
class My_WP_Widget extends WP_Widget
{
protected $id_base = null; // Will generated automatically in WP_Widget constructor
protected $classname = null; // Will generated automatically in WP_Widget constructor
protected $name = 'Default widget name';
protected $description = 'Default widget description';
protected $filename;
public function __construct() {
$widget_options = array(
'classname' => $this->classname,
'description' => $this->description,
'filename' => $this->filename
);
parent::__construct($this->id_base, $this->name, $widget_options);
}
}
class FilenameOverriding_My_WP_Widget extends My_WP_Widget
{
protected $filename = 'overriden/filename.ext';
}
// Usage:
add_action( 'widgets_init', function(){
return register_widget( 'FilenameOverriding_My_WP_Widget' );
});
这篇关于将变量传递给扩展类的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!