详解wordpress怎么添加自定义按钮并导出csv

在wp-admin/edit.php中找到如下代码：

<?php if ( current_user_can( $post_type_object->cap->create_posts ) ) {     echo ' <a href="' . esc_url( admin_url( $post_new_file ) ) . '" class="page-title-action">' . esc_html( $post_type_object->labels->add_new ) . '</a>'; }

在上面代码的下一行加入如下代码：

if ($post_type == 'aaa') {     echo ' <a href="'.esc_url( admin_url('admin-ajax.php?action=export_permanent_csv')).'" class="page-title-action">CSVをエクスポート</a>'; }

$post_type 是在这个文件的头部获取的文章的类型。
在wp-content/themes/hcr/functions/admin.php

function export_permanent_csv() {     $args = array(             'post_type' => 'aaa',             'numberposts' => -1,             'meta_key' => 'mark_id',             'orderby' => 'meta_value_num',             'order' => 'ASC',             );     $posts = get_posts($args);     if (empty($posts)) {         return;     }     $noNumber = 1;     foreach ($posts as $post) {         $metaData = get_post_meta($post->ID);         $data = [             $metaData['mark_id'][0],             $noNumber,             $post->post_title,             $metaData['prmnnt_address'][0],             $metaData['prmnnt_tel'][0],             $metaData['prmnnt_fax'][0],             $metaData['prmnnt_site'][0],             $metaData['prmnnt_time'][0],             $metaData['prmnnt_closing'][0],             $metaData['prmnnt_service'][0],             $metaData['prmnnt_class'][0],             $post->post_type,         ];         $csv_output .= '"'.implode('","', $data).'"'."n";         $noNumber++;     }     $csv_output .= "n";     $filename = $file."_".date("Ymd", time());     header("Content-type: application/vnd.ms-excel");     header("Content-disposition: csv" . date("Y-m-d") . ".csv");     header("Content-disposition: filename=".$filename.".csv");     print $csv_output;     exit;  } add_action('wp_ajax_export_permanent_csv', 'export_permanent_csv');