单看文件结构，wordpress分了3个文件夹 wp-admin，wp-content，wp-includes 和零散的一堆php，暂时不清楚各自的分工
入口文件是index.php
<?php
/**
* Front to the WordPress application. This file doesn't do anything, but loads
* wp-blog-header.php which does and tells WordPress to load the theme.
*
* @package WordPress
*/ /**
* Tells WordPress to load the WordPress theme and output it.
* 主要就是加载wp-blog-header.php
*
* @var bool
*/
define('WP_USE_THEMES', true); /** Loads the WordPress Environment and Template */
require( dirname( __FILE__ ) . '/wp-blog-header.php' );
然后是wp-blog-header.php，这里可以看出wordpress 开始分了两个模块
- 加载非template 的东西
- 加载template 的东西
<?php
/**
* Loads the WordPress environment and template.
*
* @package WordPress
*/ if ( !isset($wp_did_header) ) {// 为了首次加载才执行 $wp_did_header = true;// 定义个标志咯 require_once( dirname(__FILE__) . '/wp-load.php' );// 获取文件目录后生成绝对路径 wp();// wp-load.php 里面require了/wp-admin/setup-config.php，/wp-admin/setup-config.php里面 require了/wp-admin/wp-settings.php，/wp-admin/wp-settings.php require 了class-wp.php ，得到了WP 类，然后执行$GLOBALS['wp'] = new WP() 得到一个实例；
require_once( ABSPATH . WPINC . '/template-loader.php' );// 加载templateloader.php 文件 }