Wordpress自定义小部件记住多个选择选项

问题描述：

我正在为我们的网站编写一个自定义小部件来显示一些选定的帖子。在管理部分，我有一个多选框让管理员通过名字选择多个帖子。这工作正常，但是当我选择几个不同的帖子并保存时，没有任何东西被保存。Wordpress自定义小部件记住多个选择选项

任何人都可以对此有所了解吗？

这里是我的代码...

<?php 
/* 
Plugin Name: Hot Topics 
Plugin URI: http://www.weddingideasmag.com 
Description: Use this widget to choose an array of posts snippets to show 
Version: 1.0) 
Author: James Payne 
Author URI: http://www.bluntcreative.co.uk 
License: GPL2 
*/ 


class HotTopics extends WP_Widget { 

// constructor 
function HotTopics() { 
    $widget_ops = array('name' => 'Hot Topics','classname' => 'widget-hot-topics', 'description' => __("Use this widget to choose an array of posts snippets to show in the sidebar.")); 
    $this->WP_Widget('hottopics', __('Hot Topics'), $widget_ops); 
} 

// widget form creation 
function form($instance) { 
    // Check values 
    if($instance) { 
     $select = esc_attr($instance['select']); // Added 
    } else { 
     $select =''; 
    } 
    ?> 

    <select multiple="multiple" name="<?php echo $this->get_field_name('select'); ?>[]" id="<?php echo $this->get_field_id('select'); ?>" class="widefat" size="15" style="margin-bottom:15px;"> 
     <?php 
     $args = array('offset'=> 1, 'orderby' => 'date', 'order' => 'DESC', 'posts_per_page' => 200, 'post_status' => 'publish'); 

     // The Query 
     query_posts($args); 

     // The Loop 
     while (have_posts()) : the_post(); 

     $title = get_the_title(); 
     ?> 
      <option value="<?php echo get_the_ID();?>" class="hot-topic" <?php $select == $title ? ' selected="selected"' : '';?> style="margin-bottom:3px;"> 
       <?php echo $title;?> 
      </option> 
      <?php 
     endwhile; 

     // Reset Query 
     wp_reset_query(); 
     ?> 
    </select> 

    <?php 
} 

// update widget 
function update($new_instance, $old_instance) { 
     $instance = $old_instance; 
     // Fields 
     $instance['select'] = strip_tags($new_instance['select']); 
    return $instance; 
} 

// widget display 
function widget($args, $instance) { 
    /* ... */ 
    echo 'tetst'; 
} 
} 

// register widget 
add_action('widgets_init', create_function('', 'return register_widget("HotTopics");')); 

?>

答

当小部件更新，strip_tags正在摧毁选择职位的阵列。 A esc_sql完成这项工作。另外，don't usequery_posts。最后，存储帖子标题并不理想，因为它可能会改变，该ID是永久性的。

工作示例：

# PHP 5.3+ anonymous function 
add_action('widgets_init', function() { 
    register_widget('Sample_Widget_SO_19246434'); 
}); 

class Sample_Widget_SO_19246434 extends WP_Widget 
{ 
    function Sample_Widget_SO_19246434() 
    { 
     $this->WP_Widget( 
      'hottopics', 
      __('Hot Topics'), 
      array( 
       'name' => 'Hot Topics', 
       'classname' => 'widget-hot-topics', 
       'description' => __("Description") 
      ) 
     ); 
    } 

    function form($instance) 
    { 
     if($instance) 
      $select = $instance['select']; 
     else 
      $select =''; 

     $get_posts = get_posts(array( 
      'offset'=> 1, 
      'orderby' => 'date', 
      'order' => 'DESC', 
      'posts_per_page' => 200, 
      'post_status' => 'publish' 
     )); 
     if($get_posts) 
     { 
      printf(
       '<select multiple="multiple" name="%s[]" id="%s" class="widefat" size="15">', 
       $this->get_field_name('select'), 
       $this->get_field_id('select') 
      ); 
      foreach($get_posts as $post) 
      { 
       printf(
        '<option value="%s" class="hot-topic" %s style="margin-bottom:3px;">%s</option>', 
        $post->ID, 
        in_array($post->ID, $select) ? 'selected="selected"' : '', 
        $post->post_title 
       ); 
      } 
      echo '</select>'; 
     } 
     else 
      echo 'No posts found :('; 
    } 

    function update($new_instance, $old_instance) 
    { 
     $instance = $old_instance; 
     $instance['select'] = esc_sql($new_instance['select']); 
     return $instance; 
    } 

    function widget($args, $instance) 
    { 
     echo 'Hello world'; 
    } 
}

你是一个传奇！ –

Wordpress自定义小部件记住多个选择选项

相关推荐