我安装了一个名为posite的wordpress插件，它使我能够通过向特定的电子邮件地址发送电子邮件来发布到wordpress。

我需要一些编码方面的帮助，以便它能够根据发件人的@域地址从他们的电子邮件中发布到特定类别。

所以如果邮件来自XXX.com, 将其所有帖子发布到X类别，但如果是从ZZZ.com, 将其发布到Z类别。

---这是示例筛选器文件----

<?php
/*
Plugin Name: Postie Filter
Plugin URI: http://blog.robfelty.com/plugins/postie
Description: Adds my own custom filter to messages posted by postie
Version: 1.4
Author: Robert Felty
Author URI: http://blog.robfelty.com/
*/

/* 
* Any filter function you write should accept one argument, which is the post
array, which contains the following fields:
\'post_author\' 
\'comment_author\' 
\'comment_author_url\' 
\'user_ID\' 
\'email_author\' 
\'post_date\' 
\'post_date_gmt\' 
\'post_content\' 
\'post_title\' 
\'post_modified\' 
\'post_modified_gmt\' 
\'ping_status\' 
\'post_category\' 
\'tags_input\' 
\'comment_status\' 
\'post_name\' 
\'post_excerpt\' 
\'ID\' 
\'customImages\' 
\'post_status\' 

Your function can modify any of these fields. It should then return the array
back.

Two example functions are provided here
*/

function filter_content($post) {
  //this function prepends a link to bookmark the category of the post
  $this_cat = get_the_category($post[\'ID\']);
  //var_dump($this_cat);
  $link = \'<a href="\' . get_category_link($this_cat[0]->term_id) . 
  \'">Bookmark this category</a>\' . "\\n";
  $post[\'post_content\'] = $link . $post[\'post_content\'];
  return ($post);
}

function filter_title($post) {
  //this function appends "(via postie)" to the title (subject)
  $post[\'post_title\']= $post[\'post_title\'] . \' (via postie)\';
  return ($post);
}

function auto_tag($post) {
  // this function automatically inserts tags for a post
  $my_tags=array(\'cooking\', \'latex\', \'wordpress\');
  foreach ($my_tags as $my_tag) {
    if (stripos($post[\'post_content\'], $my_tag)!==false)
      array_push($post[\'tags_input\'], $my_tag);
  }
  return ($post);
}

function add_custom_field($post) {
  //this function appends "(via postie)" to the title (subject)
  add_post_meta($post[\'ID\'], \'postie\', \'postie\');
  return ($post);
}

add_filter(\'postie_post\', \'filter_title\');
add_filter(\'postie_post\', \'filter_content\');
add_filter(\'postie_post\', \'add_custom_field\');
add_filter(\'postie_post\', \'auto_tag\');