WordPress主题和插件更新如何从远程服务器工作 _WordPress主题

实际上, wordpress主题和插件更新的工作方式。处理该系统的核心课程是什么。 wordpress如何处理来自远程服务器的HTTP请求。
你能帮我给一些基本的指导吗？
#1核心课程：

...\wp-includes\update.php

update.php文件在api.wordpress.org服务器上检查WordPress服务器。仅检查WordPress是否未安装。

//Every 12 hours it check version function wp_version_check(){} //If Available new plugin version than call function wp_update_plugins(){} //If Available new theme version than call function wp_update_themes(){}

怎么运行的：
每隔12个小时, 你的WordPress博客就会检查新的插件版本, 并将发送的请求和收到的响应存储在一个名为” update_plugins” 的临时站点中。以下代码将显示此瞬态的内容：

add_filter ('pre_set_site_transient_update_plugins', 'display_transient_update_plugins'); function display_transient_update_plugins ($transient) { var_dump($transient); }

12小时左右后, 刷新你的Blog插件页面, 你应该获得与以下类似的输出：

object(stdClass)[18] public 'last_checked' => int 1333808132 public 'checked' => array 'access/access.php' => string '1.0' (length=3) 'adpress/wp-adpress.php' => string '3.1' (length=3) ... 'wp-paypal/plug.php' => string '1.0' (length=3) public 'response' => array 'akismet/akismet.php' => object(stdClass)[13] public 'id' => string '15' (length=2) public 'slug' => string 'akismet' (length=7) public 'new_version' => string '2.5.5' (length=5) public 'url' => string 'http://wordpress.org/extend/plugins/akismet/' (length=44) public 'package' => string 'http://downloads.wordpress.org/plugin/akismet.2.5.5.zip' (length=55) 'update.tmp/plugin.php' => object(stdClass)[12] public 'slug' => string 'plugin' (length=6) public 'new_version' => string '1.1' (length=3) public 'url' => string 'http://localhost/update.php' (length=27) public 'package' => string 'http://localhost/update.php' (length=27)

12小时的等待时间是在wp-includes / update.php文件的223行的WordPress核心中定义的, 它是$ timeout变量。
版本比较并检查新版本：

// If a newer version is available, add the update if (version_compare(1.2, 1.3, '< ')) { $obj = new stdClass(); $obj-> slug = $this-> slug; $obj-> new_version = $remote_version; $obj-> url = $this-> update_path; $obj-> package = $this-> update_path; $transient-> response[$this-> plugin_slug] = $obj; }

检查版本后是否有新版本。 WordPress的句柄更新此过滤器-

add_filter ('pre_set_site_transient_update_plugins', 'display_transient_update_plugins'); function display_transient_update_plugins ($transient) { $obj = new stdClass(); $obj-> slug = 'hello.php'; $obj-> new_version = '1.9'; $obj-> url = 'http://anyurl.com'; $obj-> package = 'http://anyurl.com'; $transient['hello.php'] => $obj; return $transient; }

处理来自远程服务器的此HTTP请求：
有三个教程可用于从远程服务器更新wordpress插件和主题-https://code.tutsplus.com/tutorials/a-guide-to-the-wordpress-http-api-automatic-plugin-updates– wp-25181
http://w-shadow.com/blog/2010/09/02/automatic-updates-for-any-plugin/ [仅适用于Apache服务器]
https://kaspars.net/blog/wordpress/automatic-updates-for-plugins-and-themes-hosted-outside-wordpress-extend