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我正在制作一个自定义帖子小部件，该小部件链接到自定义帖子类型评论，其中包含 boxart、dev、publicer 等信息，但它不会显示。有人可以告诉我我做错了什么吗？

看起来该请求在 singel.php 中的小部件中是不可能的，它是否有效但在其他小部件文件中却没有。

<?php
/**
* Plugin Name: Custom review informatio Widget
*/

add_action( 'widgets_init', 'box_review_load_widgets' );

function box_review_load_widgets() {
register_widget( 'BOX_Review_Widget' );
}

class BOX_review_Widget extends WP_Widget {

/**
 * Widget setup.
 */
function BOX_Review_Widget() {
    /* Widget settings. */
    $widget_ops = array( 'classname' => 'box_review_widget', 'description' => __('Laat meer informatie over de game zien', 'box_review_widget') );

    /* Widget control settings. */
    $control_ops = array( 'width' => 250, 'height' => 350, 'id_base' => 'box_review_widget' );

    /* Create the widget. */
    $this->WP_Widget( 'box_review_widget', __('Box: Review informatie', 'box_review_widget'), $widget_ops, $control_ops );
}

/**
 * How to display the widget on the screen.
 */
function widget( $args, $instance, $gameinfo, $reviewinfo ) {
    extract( $args );

    /* Our variables from the widget settings. */
    $title = apply_filters('widget_title', $instance['title'] );
    /* Before widget (defined by themes). */
    echo $before_widget;

    /* Display the widget title if one was input (before and after defined by themes). */
    if ( $title )
        echo $before_title . $title . $after_title;

                        ?>

        <div class="side-item">

                      <?php
  function curPageURL() {
  $pageURL = 'http';
 if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
  $pageURL .= "://";
 if ($_SERVER["SERVER_PORT"] != "80") {
 $pageURL .=     $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
   } else {
  $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
  }
  return $pageURL;
   }
          ?>

            <?php               
            $reviewinfo = get_post_meta($post->ID, 'gamebox', true);
          foreach ($reviewinfo as $gameinfo ){ 

  echo '<center><img src="' . $gameinfo['boxart'] . '" width="200" border="4" /></center><br />';
  echo '<div class="fb-like" data-href="';
  echo curPageURL() ; 
  echo '" data-send="false" data-width="283" data-show-faces="false"></div>';
echo '<strong>Genre: </strong>' . $gameinfo['genre'] . '<br />';
echo '<strong>Releasedatum: </strong>' . $gameinfo['releasedatum'] . '<br />';
echo '<strong>Franchise: </strong>' . $gameinfo['franchise'] . '<br />';
echo '<strong>Ontwikkelaar: </strong>' . $gameinfo['ontwikkelaar'] . '<br />';
echo '<strong>Uitgever: </strong>' . $gameinfo['uitgever'] . '<br />';
echo '<strong>Beschikbaar op: </strong><br />' . $gameinfo['beschikbaar-op'] . '<br />';
echo '<strong>PEGI: </strong>' . $gameinfo['pegi'] . '<br />';
                             } 
                        ?>

          </p>              

        </div>

    <?php

    /* After widget (defined by themes). */
    echo $after_widget;
}

/**
 * Update the widget settings.
 */
function update( $new_instance, $old_instance ) {
    $instance = $old_instance;

    /* Strip tags for title and name to remove HTML (important for text inputs). */
    $instance['title'] = strip_tags( $new_instance['title'] );

    return $instance;
}


function form( $instance ) {

    /* Set up some default widget settings. */
    $defaults = array( 'title' => __('Game Informatie'));
    $instance = wp_parse_args( (array) $instance, $defaults ); ?>

    <!-- Widget Title: Text Input -->
    <p>
        <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e('Title:', 'hybrid'); ?></label>
        <input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" style="width:90%;" />
    </p>



<?php
}
    }
    ?>
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