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<?php
/*
Plugin Name:    Custom Author
Plugin URI:     https://www.ixiqin.com/2018/06/wordpress-custom-author-plugin/
Description:    自定义作者插件
Version:        1.0
Author:         Bestony
Author URI:     https://www.ixiqin.com/
License:        GPL2
License URI:    https://www.gnu.org/licenses/gpl-2.0.html*/
/*  Copyright  2018 Bestony (email : xiqingongzi@gmail.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA*/add_action('post_submitbox_misc_actions', 'cus_author_createCustomField');
add_action('save_post', 'cus_author_saveCustomField');
/** 创建一个checkBox */
function cus_author_createCustomField() {$post_id = get_the_ID();if (get_post_type($post_id) != 'post') {return;}/*** 提取现有的值* @var boolean*/$value = get_post_meta($post_id, '_custom_author_name', true);/*** 添加 nonce 安全处理*/wp_nonce_field('custom_author_nonce' , 'custom_author_nonce');?><div class="misc-pub-section misc-pub-section-last dashicons-before dashicons-admin-users"><label><b>作者：</b><input type="text" value="<?php echo $value ?>" name="_custom_author_name" /></label></div><?php
}
/*** 保存配置信息* @param  int $post_id 文章的ID*/
function cus_author_saveCustomField($post_id) {/*** 自动保存不处理*/if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {return;}/*** nonce 信息不正确不处理*/if (!isset($_POST['custom_author_nonce']) ||!wp_verify_nonce($_POST['custom_author_nonce'], 'custom_author_nonce')) {return;}/*** 用户无权编辑文章不处理*/if (!current_user_can('edit_post', $post_id)) {return;}/*** 存在此项目就更新*/if (isset($_POST['_custom_author_name'])) {update_post_meta($post_id, '_custom_author_name', sanitize_text_field($_POST['_custom_author_name']));} else {/*** 不存在就删除*/delete_post_meta($post_id, '_custom_author_name');}
}add_filter('the_author','cus_author_the_author');
function cus_author_the_author($author){$custom_author = get_post_meta(get_the_ID(), '_custom_author_name');if ($custom_author) {return $custom_author[0];} else {return $author;}
}