Wordpress:如何在 wp_insert_post_data() 中显示自定义错误消息 [英] Wordpress: how displaying custom error message in wp_insert_post_data()

问题描述

我将显示自定义 - 错误消息.

I'll show a custom - error message.

function ccl($data, $postarr = '') {
 if($data['post_status'] == "publish"){
  $data['post_status'] = "draft"; 
  echo '<div id="my-custom-error" class="error fade"><p>Publish not allowed</p></div>';
 }  
  return $data;
}

add_filter( 'wp_insert_post_data' , 'ccl' , '99' );

我尝试了很多想法，但每次成功信息都来自文章发表的 wordpress.我可以取消成功消息并显示我自己的错误消息吗?

I've try many thinks but everytime a success message comes from wordpress that the article published. Can i kill the success message and show my own error message?

坦克求助...

推荐答案

您无法在 wp_insert_post_data 过滤器，因为用户在此之后立即被重定向.最好的做法是挂钩重定向过滤器，并向查询字符串添加一个消息变量(这将覆盖任何现有的 Wordpress 消息).

You can't print an error in a wp_insert_post_data filter because the user is redirected immediately after this. The best thing to do is to hook into the redirect filter and add a message variable to the query string (this will overwrite any existing Wordpress message).

因此，在您的 wp_insert_post_data 过滤器函数中添加重定向过滤器.

So, add the redirect filter in your wp_insert_post_data filter function.

add_filter('wp_insert_post_data', 'ccl', 99);
function ccl($data) {
  if ($data['post_type'] !== 'revision' && $data['post_status'] == 'publish') {
    $data['post_status'] = 'draft';
    add_filter('redirect_post_location', 'my_redirect_post_location_filter', 99);
  }
  return $data;
}

然后在重定向过滤器函数中添加一个消息变量.

Then add a message variable in the redirect filter function.

function my_redirect_post_location_filter($location) {
  remove_filter('redirect_post_location', __FUNCTION__, 99);
  $location = add_query_arg('message', 99, $location);
  return $location;
}

最后连接到 post_updated_messages 过滤器并添加您的消息，以便 Wordpress 知道要打印什么.

Finally hook into the post_updated_messages filter and add your message so Wordpress knows what to print.

add_filter('post_updated_messages', 'my_post_updated_messages_filter');
function my_post_updated_messages_filter($messages) {
  $messages['post'][99] = 'Publish not allowed';
  return $messages;
}

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