为了对默认Recent Posts Widget
应用某些更改,我已将其复制并修改为我的需要。它包含在我的模板functions.php
中并注册,当在管理面板中加载小部件时,它的构造函数就会运行。
问题是它没有出现在可用小部件列表中,因此无法使用。当我尝试http://www.darrenhoyt.com/2009/12/22/creating-custom-wordpress-widgets/的最小例子时也会出现问题,所以我想我错过了一些重要的东西,但不知道是什么。
toolbox_
的多次出现。functions.php
和inc/widgets.php
的代码摘录
<?php
// BEGIN functions.php
if ( ! function_exists( 'toolbox_setup' ) ):
/**
* Sets up theme defaults and registers support for various WordPress features.
*
* Note that this function is hooked into the after_setup_theme hook, which runs
* before the init hook. The init hook is too late for some features, such as indicating
* support post thumbnails.
*
* To override toolbox_setup() in a child theme, add your own toolbox_setup to your child theme's
* functions.php file.
*/
function toolbox_setup() {
// [...]
require( get_template_directory() . '/inc/widgets.php' );
// [...]
}
endif; // toolbox_setup
/**
* Tell WordPress to run toolbox_setup() when the 'after_setup_theme' hook is run.
*/
add_action( 'after_setup_theme', 'toolbox_setup' );
/**
* Register widgetized area and update sidebar with default widgets
*/
function toolbox_widgets_init() {
register_widget("My_Widget_Recent_Posts");
register_sidebar( array(
'name' => __( 'Sidebar 1', 'toolbox' ),
'id' => 'sidebar-1',
'before_widget' => '<aside id="%1$s" class="widget %2$s">',
'after_widget' => "</aside>",
'before_title' => '<h1 class="widget-title small">',
'after_title' => '</h1>',
) );
}
add_action( 'init', 'toolbox_widgets_init' );
// END functions.php
?>
<?php
// BEGIN inc/widgets.php
/**
* Recent_Posts widget class
*
* @since 2.8.0
*/
class My_Widget_Recent_Posts extends WP_Widget {
function __construct() {
$widget_ops = array('classname' => 'my_widget_recent_entries', 'description' => __( "The most recent posts on your site (modified)") );
parent::__construct('my-recent-posts', __('Recent Posts (modified)'), $widget_ops);
$this->alt_option_name = 'my_widget_recent_entries';
add_action( 'save_post', array(&$this, 'flush_widget_cache') );
add_action( 'deleted_post', array(&$this, 'flush_widget_cache') );
add_action( 'switch_theme', array(&$this, 'flush_widget_cache') );
}
function widget($args, $instance) {
$cache = wp_cache_get('my_widget_recent_posts', 'widget');
if ( !is_array($cache) )
$cache = array();
if ( ! isset( $args['widget_id'] ) )
$args['widget_id'] = $this->id;
if ( isset( $cache[ $args['widget_id'] ] ) ) {
echo $cache[ $args['widget_id'] ];
return;
}
ob_start();
extract($args);
$title = apply_filters('widget_title', empty($instance['title']) ? __('Recent Posts') : $instance['title'], $instance, $this->id_base);
if ( empty( $instance['number'] ) || ! $number = absint( $instance['number'] ) )
$number = 10;
$r = new WP_Query( apply_filters( 'widget_posts_args', array( 'posts_per_page' => $number, 'no_found_rows' => true, 'post_status' => 'publish', 'ignore_sticky_posts' => true ) ) );
if ($r->have_posts()) :
?>
<?php echo $before_widget; ?>
<?php if ( $title ) echo $before_title . $title . $after_title; ?>
<ul>
<?php while ($r->have_posts()) : $r->the_post(); ?>
<li><a href="<?php the_permalink() ?>" title="<?php echo esc_attr(get_the_title() ? get_the_title() : get_the_ID()); ?>"><?php if ( get_the_title() ) the_title(); else the_ID(); ?></a>
<?php the_content(); ?></li>
<?php endwhile; ?>
</ul>
<?php echo $after_widget; ?>
<?php
// Reset the global $the_post as this query will have stomped on it
wp_reset_postdata();
endif;
$cache[$args['widget_id']] = ob_get_flush();
wp_cache_set('my_widget_recent_posts', $cache, 'widget');
}
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance['title'] = strip_tags($new_instance['title']);
$instance['number'] = (int) $new_instance['number'];
$this->flush_widget_cache();
$alloptions = wp_cache_get( 'alloptions', 'options' );
if ( isset($alloptions['my_widget_recent_entries']) )
delete_option('my_widget_recent_entries');
return $instance;
}
function flush_widget_cache() {
wp_cache_delete('my_widget_recent_posts', 'widget');
}
function form( $instance ) {
$title = isset($instance['title']) ? esc_attr($instance['title']) : '';
$number = isset($instance['number']) ? absint($instance['number']) : 5;
?>
<p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" /></p>
<p><label for="<?php echo $this->get_field_id('number'); ?>"><?php _e('Number of posts to show:'); ?></label>
<input id="<?php echo $this->get_field_id('number'); ?>" name="<?php echo $this->get_field_name('number'); ?>" type="text" value="<?php echo $number; ?>" size="3" /></p>
<?php
}
}
// END inc/widgets.php
?>
。如果需要,我可以提供更多代码。请让我
在评论中知道。代码:
{{1}}
答案 0 :(得分:3)
您必须将register_widget
挂钩到widgets_init
操作,而不是init
操作。在你的情况下,它是这样的:
<?php
add_action( 'widgets_init', 'toolbox_widgets_init' );
function toolbox_widgets_init() {
register_widget("My_Widget_Recent_Posts");
}
?>
答案 1 :(得分:1)
好的,让我们做一些调试测试:
echo "include widget file";
require( get_template_directory() . '/inc/widgets.php' );
此外:
echo "register widget";
register_widget("My_Widget_Recent_Posts");
然后:
function __construct() {
echo "widget class";
检查你的HTML,看看哪些部分回显了,哪些部分没有你可能会得到Headers已经发送错误,你可以忽略。希望我们能够看到哪个部分没有被触发以缩小问题的范围。
答案 2 :(得分:1)
如下注册小部件解决了我的问题,但在我看来并不是很优雅。在类定义后面我插入了行
<?php
add_action( 'widgets_init', create_function('',
'return register_widget("My_Widget_Recent_Posts");') );
?>
并从我认为属于的toolbox_widgets_init()
删除了注册。
如果有人可以解释为什么它必须是这样的,或者我可以改变什么,以便它能像我打算在我高度赞赏评论之前那样工作。但是现在问题已经解决了。