使自定义分类查询在此函数中工作时出现问题。$筛选器中填充了数据，但get\\u posts（）不使用它？查询在没有tax\\u查询的情况下工作，并且有：具有正确分类法的自定义帖子（列表）。。。想要我失踪吗？

add_action( \'restrict_manage_posts\', \'add_export_button\' );
function add_export_button() {
    $screen = get_current_screen();

if (isset($screen->parent_file) && (\'edit.php?post_type=certificate\'==$screen->parent_file)) {
        ?>
        <input type="submit" name="export_all_posts" id="export_all_posts" class="button button-primary" value="Export All Posts">
        <script type="text/javascript">
            jQuery(function($) {
                $(\'#export_all_posts\').insertAfter(\'#post-query-submit\');
            });
        </script>
        <?php
    }
}

add_action( \'init\', \'func_export_all_posts\' );
function func_export_all_posts() {
    if(isset($_GET[\'export_all_posts\'])) {
        if(isset($_GET[\'list\'])) {
            $filter =  strval($_GET[\'list\']);
        };
        $arg = array(
                \'post_type\' => \'certificate\',
                \'post_status\' => \'publish\',
                \'posts_per_page\' => -1,
                \'tax_query\' => array(
                    array(
                        \'taxonomy\' => \'list\',
                        \'field\'    => \'slug\',
                        \'terms\'    => $filter ,
                    )
                    ),
            );

        global $post;
        $arr_post = get_posts($arg);

        if ($arr_post) {

        header(\'Content-type: text/csv\');
        header(\'Content-Disposition: attachment; filename="wp.csv"\');
        header(\'Pragma: no-cache\');
        header(\'Expires: 0\');

        $file = fopen(\'php://output\', \'w\');

        fputcsv($file, array(\'Post Title\', \'URL\'));

            foreach ($arr_post as $post) {
                setup_postdata($post);
                fputcsv($file, array(get_the_title(), get_the_permalink()));
            }

            exit();
        }
    }
}