Dynamic versions of the accepted answers:

要使用Howdy{$taxonomy}\\u pre\\u add\\u formaction的动态版本向每个公共分类法添加描述，而不为每个分类法编写描述，请使用以下方法：

/**
 * Prepend taxonomy description to Add New Term form for each taxonomy
 */
add_action(\'init\', \'MCMLXV_add_taxonomy_decriptions\');
function MCMLXV_add_taxonomy_decriptions()
{
    $args = array(
        \'public\'   => true,
        \'_builtin\' => false
    );
    $taxonomies = get_taxonomies($args, \'names\', \'and\');
    foreach ($taxonomies as $key => $taxonomy) {
    // Create a dynamic anonymous function foreach of our taxonomies 
    // and pass the taxonomy name variable to the anonymous function
        add_action($taxonomy . \'_pre_add_form\', function ($taxonomy) {
            // Grab the Taxonomy Object
            $tax_obj = get_taxonomy($taxonomy);

            // IF the description is set on our object
            if (property_exists($tax_obj, \'description\')) {
                echo \'<h2>Description</h2>\';
                echo apply_filters(\'the_content\', $tax_obj->description);
            }
        });
    }
}

将以上答案组合为Howdy_McGee 和Davey 为了根据分类法层次结构是否设置为false（即标记或自定义标记分类法）进行动态，并使js变量唯一，我使用了以下方法：

<script type="text/javascript" id="mythemehere_taxonomy_metabox_description">
    <?php foreach ($taxonomies as $taxonomy) { ?>
        <?php if ($taxonomy->hierarchical == false) { ?>

            // Unique variables per tax
            var tax_slug_<?php echo $taxonomy->name; ?> = \'<?php echo $taxonomy->name; ?>\';
            var tax_desc_<?php echo $taxonomy->name; ?> = \'<?php echo $taxonomy->description; ?>\';

            // jQuery targeting of hierarchal false taxonomies (tags)
            jQuery(\'#tagsdiv-\' + tax_slug_<?php echo $taxonomy->name; ?> + \' div.inside\').prepend(\'<p>\' + tax_desc_<?php echo $taxonomy->description; ?> + \'</p>\');

        <?php } else { ?>

            // Unique variables per tax
            var tax_slug_<?php echo $taxonomy->name; ?> = \'<?php echo $taxonomy->name; ?>\';
            var tax_desc_<?php echo $taxonomy->name; ?> = \'<?php echo $taxonomy->description; ?>\';

            // jQuery targeting of hierarchal true taxonomies (categories)
            jQuery(\'#\' + tax_slug_<?php echo $taxonomy->name; ?> + \'div div.inside\').prepend(\'<p>\' + tax_desc_<?php echo $taxonomy->name; ?> + \'</p>\');

        <?php } ?>
     <?php } ?>
</script>

这将输出如下内容：

<script type="text/javascript" id="mythemehere_taxonomy_metabox_description">
    var tax_slug_portfolio_category = \'portfolio_category\';
    var tax_desc_portfolio_category = \'this is your unique description\';
    // Add the description via jQuery
    jQuery(\'#\' + tax_slug_portfolio_category + \'div div.inside\').prepend(\'<p>\' + tax_desc_portfolio_category + \'</p>\');
                                                                                 
    var tax_slug_portfolio_tag = \'portfolio_tag\';
    var tax_desc_portfolio_tag = \'this is your unique description\';
    // Add the description via jQuery
    jQuery(\'#tagsdiv-\' + tax_slug_portfolio_tag + \' div.inside\').prepend(\'<p>\' + tax_desc_portfolio_tag + \'</p>\');

以上和我的代码中的所有答案都假设您已经在register\\u分类法中设置了描述和层次结构（$args）。省略本例中所有不必要的参数：

    $args = array(
        \'hierarchical\' => true,
        \'description\' => \'this is your unique description\',
    );
    register_taxonomy(\'portfolio_category\', array(\'portfolio\'), $args);