我在保存自定义帖子元字段时遇到问题，我不太清楚原因。我正在学习位于http://blog.teamtreehouse.com/create-your-first-wordpress-custom-post-type 而且对那篇文章中发生的特殊字符爆炸进行反编码有很大困难。。。非常感谢您的帮助。

add_action("admin_init", "admin_init");

function admin_init(){
  add_meta_box("job_location", "Job Location", "location_callback", "job_or_internship", "side", "default");
  add_meta_box("start_date", "Start Date", "start_callback", "job_or_internship", "side", "default");
}

function location_callback(){
  global $post;
  $custom = get_post_custom($post_ID);
  $location_callback = $custom["location_callback"];
  ?>
  <label>Job Location:</label>
  <input name="year_completed" value="<?php echo $location_callback; ?>">
  <?php
}

function start_callback() {
  global $post;
  $custom = get_post_custom($post_ID);
  $start_callback = $custom["start_callback"][0];
  ?>
  <label>Start Date:</label>
  <input name="start_callback" value="<?php echo $start_callback; ?>">
  <?php
}

add_action(\'save_post\', \'save_details\');
function save_details(){
  global $post;

  update_post_meta($post_ID, "location_callback", $_POST["location_callback"]);
  update_post_meta($post_ID, "start_callback", $_POST["start_callback"]);
}