public static function activity_admin_delete_post()
 {
     if (!isset($_GET['post_id']) || !wp_verify_nonce($_GET['_wpnonce'], self::NONCE)) {
         self::activity_admin_display_message('error', '非法请求!');
     } else {
         $the_post = get_post(intval($_GET['post_id']));
         if (!empty($the_post)) {
             global $wpdb;
             $table_name = $wpdb->prefix . 'activity_meta';
             $signup_delete = Activity_Signup::activity_signup_delete_all(intval($_GET['post_id']));
             $actiity_meta_delete = $wpdb->delete($table_name, array('post_id' => intval($_GET['post_id'])));
             $post_deleted = wp_delete_post(intval($_GET['post_id']), true);
             if ($post_deleted !== false && !empty($signup_delete) && !empty($actiity_meta_delete)) {
                 self::activity_admin_display_message('updated', '活动删除成功!');
             } else {
                 self::activity_admin_display_message('error', '删除活动失败!');
             }
         } else {
             self::activity_admin_display_message('error', '非法请求!');
         }
     }
     Activity::activity_view('activity_admin_list');
 }
" class="page-title-action">添加活动</a></h1>
	<table class="am-table am-table-hover">

		<?php 
if (!empty($all_activity)) {
    ?>
		<tr>
			<td>ID</td>
			<td>标题</td>
			<td>报名数</td>
			<td>最后修改</td>
			<td>操作</td>
		</tr>
		<?php 
    foreach ($all_activity as $activity) {
        $activity_signup_count = Activity_Signup::activity_signup_count($activity->ID);
        $activity_capacity = Activity_Admin::activity_admin_get_capacity($activity->ID);
        echo '<tr>' . '<td>' . $activity->ID . '</td>' . '<td><a href="' . esc_url(Activity_Admin::activity_admin_get_url('activity_admin_signup_list', $activity->ID)) . '">' . $activity->post_title . '</a></td>';
        if ($activity_capacity == 0) {
            echo '<td style="color: #00ff00;">' . $activity_signup_count . '</td>';
        } else {
            echo '<td' . ($activity_signup_count / $activity_capacity >= 0.9 ? ' style="color: #ff0000;"' : ' style="color: #00ff00;"') . '>' . $activity_signup_count . ' / ' . $activity_capacity . '</td>';
        }
        echo '<td>' . $activity->post_modified . '</td>' . '<td><a href="' . esc_url(Activity_Admin::activity_admin_get_url('activity_admin_edit_post', $activity->ID)) . '">编辑</a> | <a href="' . esc_url(Activity_Admin::activity_admin_get_url('activity_admin_delete_post', $activity->ID)) . '">删除</a></td>' . '</tr>';
    }
} else {
    echo '<h2>没有活动!</h2>';
}
?>
	</table>
</div>
<?php

include 'style.php';
$add_new = $_GET['signup_action'] == 'add' ? true : false;
$post_id = isset($_GET['post_id']) ? intval($_GET['post_id']) : 0;
if (!$add_new) {
    $signup = Activity_Signup::activity_signup_get_signup(intval($_GET['signup_id']));
}
?>

<div class="wrap">
    <form class="am-form am-form-horizontal" method="POST" action="<?php 
echo esc_url(Activity_Admin::activity_admin_get_url('activity_admin_process_signup'));
?>
">
	     <fieldset>

	    <legend><?php 
echo $add_new ? '添加参与者' : '编辑参与者';
?>
</legend>

	    <input type="hidden" name="is_new" value="<?php 
echo $add_new ? 1 : -1;
?>
">
	    <input type="hidden" name="post_id" value="<?php 
echo $post_id;
?>
">
	    <input type="hidden" name="signup_id" value="<?php 
<?php

include 'style.php';
$post_id = isset($_GET['post_id']) ? intval($_GET['post_id']) : 0;
$list = Activity_Signup::activity_signup_get_list($post_id);
?>

<div class="wrap">
  <h1><?php 
echo $post_id == 0 ? 'No Activity' : get_the_title($post_id);
?>
 <a href="<?php 
echo esc_url(Activity_Admin::activity_admin_get_url('activity_admin_add_signup', $post_id));
?>
" class="page-title-action">添加参与者</a></h1>
  <table class="am-table am-table-hover">
    <?php 
if ($post_id != 0) {
    ?>
     <tr style="text-align:center;">
       <td>ID</td>
       <td>姓名</td>
       <td>E-mail</td>
       <td>电话</td>
       <td>是否付费</td>
       <td>AUT学生</td>
       <td>CSA会员</td>
       <td>最后修改</td>
       <td>操作</td>
     </tr>
     <?php