我在产品分类法中添加了一些自定义元字段“艺术家”，它们工作得很好并保存到分类法中

    /**
add meta data to artist taxonomy */

function artist_add_meta_fields( $taxonomy ) {
    ?>
    <div class="form-field term-group">
        <label for="artist_nickname"><?php _e( \'Nickname\', \'my-plugin\' ); ?></label>
        <input type="text" id="artist_nickname" name="artist_nickname" />
    </div>

    <?php
}
add_action( \'artist_add_form_fields\', \'artist_add_meta_fields\', 10, 2 );


function artist_edit_meta_fields( $term, $taxonomy ) {
    $artist_nickname = get_term_meta( $term->term_id, \'artist_nickname\', true );
     ?>

    <tr class="form-field term-group-wrap">
        <th scope="row">
            <label for="artist_nickname"><?php _e( \'Nickname\', \'my-plugin\' ); ?></label>
        </th>
        <td>
            <input type="text" id="artist_nickname" name="artist_nickname" value="<?php echo $artist_nickname; ?>" />
        </td>
    </tr>

    <?php
}
add_action( \'artist_edit_form_fields\', \'artist_edit_meta_fields\', 10, 2 );

function artist_save_taxonomy_meta( $term_id, $tag_id ) {
    if( isset( $_POST[\'artist_nickname\'] ) ) {
        update_term_meta( $term_id, \'artist_nickname\', esc_attr( $_POST[\'artist_nickname\'] ) );
    }

}
add_action( \'created_artist\', \'artist_save_taxonomy_meta\', 10, 2 );
add_action( \'edited_artist\', \'artist_save_taxonomy_meta\', 10, 2 );

//Get Taxonomy Meta
$artist_nickname = get_term_meta($term->term_id,\'artist_nickname\');
echo $artist_nickname;