Question

我正在创建一个具有以下功能的小部件：用户可以向他们添加图像，它们可以显示在前端。我有admin.php文件，当我创建输入类型文件表单时。在my.widget.php中是主要的小部件文件。在这个功能中：

    public function widget( $args, $instance ) {

            if ( ! isset ( $args['widget_id'] ) )
                $args['widget_id'] = $this->id;

            extract( $args, EXTR_SKIP );

            $widget_string = $before_widget;

            $title = isset( $instance[ 'my-file' ] ) ? $instance[ 'my-file' ] : '';

 }

我尝试保存输入类型文件“my-file”，但点击“保存”按钮后，它不会保存。我也试过$_FILES[ 'my-file' ]，但仍然没有保存。注意：如果我将输入类型更改为“text”，则保存，但是使用file - not。问题是：我如何在窗口小部件中保存输入类型文件？

Answer 1

以下是创建窗口小部件的完整代码，并在数据库中保存字段。

在function.php文件中添加代码

require get_template_directory().'/classes/widget.php';
$widgets  = new wpb_widget();

在我们在上面的代码中包含的widget.php文件中添加以下代码。

//创建小部件

class wpb_widget extends WP_Widget {

function __construct() {
parent::__construct(
// Base ID of your widget
'wpb_widget', 

// Widget name will appear in UI
__('Services Widget', 'wpb_widget_domain'), 

// Widget description
array( 'description' => __( 'Sample widget based on Services Widget', 'wpb_widget_domain' ), ) 
);
}

//创建小部件前端

//这是行动发生的地方

public function widget( $args, $instance ) {
global $wpdb;        
$title = apply_filters( 'widget_title', $instance['title'] );
$numberofpost = apply_filters( 'widget_title', $instance['numberofpost'] );
// before and after widget arguments are defined by themes
echo $args['before_widget'];
if ( ! empty( $title ) )
echo '<div class="glossymenu"><div class="acor">';    

echo $args['before_title'];
echo '<h2 class="menuitem submenuheader"><span class="glossyspan">'.$title.'</span></h2>';; 
echo '<div style="text-align:right">
                <a href="" class="prevprog"><img src="'.get_template_directory_uri().'/images/inner_prev.png" alt="inner_prev"></a>
                <a href="" class="nextprog"><img src="'.get_template_directory_uri().'/images/inner_next.png" alt="inner_next"></a>
            </div>';


echo $args['after_title'];

$query = new WP_Query(array('post_type' => 'services','posts_per_page'=>$numberofpost,'orderby'=> 'ID','order' => 'DESC'));
$totalrecord = $query->post_count;
echo '<div id="programs">';
$mm = 0;
while ($query->have_posts()) : $query->the_post();
$thumb_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), array(127, 123) );
          if($mm == 0)
          {  
            echo '<div class="submenu"><ul>';
          }  
          $expert = strip_tags(get_the_excerpt());

            if (strlen($expert) > 56) {

                // truncate string
                $stringCut = substr($expert, 0, 56);

                // make sure it ends in a word so assassinate doesn't become ass...
                $expert = substr($stringCut, 0, strrpos($stringCut, ' ')); 
            }

          echo '<li>
              <img width="58" src="'.$thumb_image_url[0].'" alt="'.$totalrecord.'" />
              <span class="bText">'.get_the_title().'</span>
              <span class="sText">'.$expert.'</span></li>';
          $mm++;
          if($mm == 4 or ($totalrecord == $mm))
          {    
            echo '</ul></div>';
            $mm = 0;
          }  

endwhile; wp_reset_query();          
echo '</div>';
echo '</div></div>';
echo $args['after_widget'];
}

// Widget Backend

public function form( $instance ) {
if ( isset( $instance[ 'title' ] ) ) {
$title = $instance[ 'title' ];
}
else {
$title = __( 'Services', 'wpb_widget_domain' );
}
if ( isset( $instance[ 'numberofpost' ] ) ) {
$numberofpost = $instance[ 'numberofpost' ];
}
else {
$numberofpost = __( '5', 'wpb_widget_domain' );
}
// Widget admin form
?>
<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 esc_attr( $title ); ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id( 'numberofpost' ); ?>"><?php _e( 'Number of posts to show:' ); ?></label> 
<input class="widefat" id="<?php echo $this->get_field_id( 'numberofpost' ); ?>" name="<?php echo $this->get_field_name( 'numberofpost' ); ?>" type="text" value="<?php echo esc_attr( $numberofpost ); ?>" />
</p>
<?php 
}

// Updating widget replacing old instances with new
public function update( $new_instance, $old_instance ) {
$instance = array();
$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
$instance['numberofpost'] = ( ! empty( $new_instance['numberofpost'] ) ) ? strip_tags( $new_instance['numberofpost'] ) : '';
return $instance;
}
}

//类wpb_widget在这里结束

获取小部件内的输入类型文件值

1 个答案: