首先，我不擅长PHP，所以这可能是问题所在。。。因此，在尝试做我想做的事情但没有成功之后，我想寻求我们的帮助。对你们大多数人来说，这可能就像吃早餐一样简单。

我有一段代码，仅当子项不为空时才显示它们，我想将其更改为显示子项，即使它们为空。这是Adifier WP主题的一部分。

            <?php
            if( !empty( $term->children ) ){
                ?>
                <ul class="list-unstyled hidden">
                    <?php self::taxonomy_listing( $name, $term->children, $taxonomy, $selected_term ); ?>
                </ul>
                <?php
            }
            ?>

这是一个完整的功能代码。也许这也会有帮助：

    /*
* Display filter taxonomies
*/
static public function taxonomy_listing( $name, $terms, $taxonomy, $selected_term ){
    $search_more_less = adifier_get_option( \'search_more_less\' );
    $counter = 0;
    foreach( $terms as $term ){
        $counter++;
        ?>
        <li class="<?php echo !empty( $search_more_less ) && $counter > $search_more_less ? esc_attr( \'term-hidden\' ) : \'\' ?>">
            <div class="styled-radio">
                <input type="radio" name="<?php echo esc_attr( $name ) ?>" value="<?php echo esc_attr( $term->term_id ) ?>" id="<?php echo esc_attr( $name ) ?>-<?php echo esc_attr( $term->term_id ) ?>" <?php echo  $term->term_id == $selected_term ? esc_attr( \'checked="checked"\' ) : \'\' ?>>
                <label for="<?php echo esc_attr( $name ) ?>-<?php echo esc_attr( $term->term_id ) ?>"><?php echo  $term->name ?></label>
                <?php
                    if( !empty( $term->children ) ){
                        ?>
                        <a href="javascript:void(0);"><i class="aficon-angle-down"></i></a>
                        <?php
                    }
                ?>                  
            </div>
            <?php
            if( !empty( $term->children ) ){
                ?>
                <ul class="list-unstyled hidden">
                    <?php self::taxonomy_listing( $name, $term->children, $taxonomy, $selected_term ); ?>
                </ul>
                <?php
            }
            ?>
        </li>
        <?php
    }

    if( !empty( $search_more_less ) && $counter > $search_more_less ){
        ?>
        <li class="toggle-more-less-wrap">
            <a href="javascript:void(0)" data-less="<?php esc_attr_e( \'Show Less\', \'adifier\' ) ?>" data-more="<?php esc_attr_e( \'Show More\', \'adifier\' ) ?>" class="toggle-more-less"><span><?php esc_html_e( \'Show More\', \'adifier\' ) ?></span> <i class="aficon-caret-down"></i></a>
        </li>
        <?php
    }
} 

我将非常感谢你的帮助！

/*
* Display filter taxonomies
*/
static public function taxonomy_listing( $name, $terms, $taxonomy, $selected_term, $hide_empty = false ){
    $search_more_less = adifier_get_option( \'search_more_less\' );
    $counter = 0;

    foreach( $terms as $term ){
        $counter++;
        ?>
        <li class="<?php echo !empty( $search_more_less ) && $counter > $search_more_less ? esc_attr( \'term-hidden\' ) : \'\' ?>">
            <div class="styled-radio">
                <input type="radio" name="<?php echo esc_attr( $name ) ?>" value="<?php echo esc_attr( $term->term_id ) ?>" id="<?php echo esc_attr( $name ) ?>-<?php echo esc_attr( $term->term_id ) ?>" <?php echo  $term->term_id == $selected_term ? esc_attr( \'checked="checked"\' ) : \'\' ?>>
                <label for="<?php echo esc_attr( $name ) ?>-<?php echo esc_attr( $term->term_id ) ?>"><?php echo  $term->name ?></label>
                <?php
                    if( !empty( $term->children ) ){
                        ?>
                        <a href="javascript:void(0);"><i class="aficon-angle-down"></i></a>
                        <?php
                    }
                ?>                  
            </div>
            <?php
            if( !empty( $term->children = adifier_get_taxonomy_hierarchy( $taxonomy, $term->term_id, $hide_empty ) ) ){
                ?>
                <ul class="list-unstyled hidden">
                    <?php self::taxonomy_listing( $name, $term->children, $taxonomy, $selected_term ); ?>
                </ul>
                <?php
            }
            ?>
        </li>
        <?php
    }