如何创建wordpress插件，该插件将从外部json提要创建和更新自定义帖子类型

/*
Plugin Name: My Plugin
Plugin URI: https://example.com/my-plugin
Description: This is a custom WordPress plugin.
Version: 1.0
Author: Your Name
Author URI: https://example.com
License: GPL2
*/

// 插件代码将在这里编写

register_activation_hook( __FILE__, 'my_plugin_activate' );
register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );

function my_plugin_activate() {
    // 在插件激活时执行的代码
}

function my_plugin_deactivate() {
    // 在插件停用时执行的代码
}

add_action( 'init', 'my_plugin_create_post_type' );

function my_plugin_create_post_type() {
    $args = array(
        'public' => true,
        'label'  => 'Custom Post Type',
        // 添加更多参数以满足你的需求
    );

    register_post_type( 'custom_post_type', $args );
}

add_action( 'init', 'my_plugin_update_custom_posts' );

function my_plugin_update_custom_posts() {
    $json_url = 'https://example.com/data.json';
    $json_data = file_get_contents( $json_url );
    $posts = json_decode( $json_data, true );

    foreach ( $posts as $post ) {
        $post_id = wp_insert_post( array(
            'post_title'   => $post['title'],
            'post_content' => $post['content'],
            'post_type'    => 'custom_post_type',
            // 添加更多参数以满足你的需求
        ) );

        // 更新自定义字段等其他操作
    }
}