wp-load.php
<?php
/**
* Bootstrap file for setting the ABSPATH constant
* and loading the wp-config.php file. The wp-config.php
* file will then load the wp-settings.php file, which
* will then set up the WordPress environment.
*
* If the wp-config.php file is not found then an error
* will be displayed asking the visitor to set up the
* wp-config.php file.
*
* Will also search for wp-config.php in WordPress' parent
* directory to allow the WordPress directory to remain
* untouched.
*
* @internal This file must be parsable by PHP4.
*
* @package WordPress
*/ /** Define ABSPATH as this file's directory */
define( 'ABSPATH', dirname(__FILE__) . '/' ); error_reporting( E_CORE_ERROR | E_CORE_WARNING | E_COMPILE_ERROR | E_ERROR | E_WARNING | E_PARSE | E_USER_ERROR | E_USER_WARNING | E_RECOVERABLE_ERROR ); /*
* If wp-config.php exists in the WordPress root, or if it exists in the root and wp-settings.php
* doesn't, load wp-config.php. The secondary check for wp-settings.php has the added benefit
* of avoiding cases where the current directory is a nested installation, e.g. / is WordPress(a)
* and /blog/ is WordPress(b).
*
* If neither set of conditions is true, initiate loading the setup process.
*/
if ( file_exists( ABSPATH . 'wp-config.php') ) {//第一次运行之前是没有wp-config.php这个文件的 /** The config file resides in ABSPATH */
require_once( ABSPATH . 'wp-config.php' ); } elseif ( @file_exists( dirname( ABSPATH ) . '/wp-config.php' ) && ! @file_exists( dirname( ABSPATH ) . '/wp-settings.php' ) ) {//第一次运行之前也没有wp-settings.php这个文件 /** The config file resides one level above ABSPATH but is not part of another install */
require_once( dirname( ABSPATH ) . '/wp-config.php' ); } else { // A config file doesn't exist
// 所以第一次就是进来这里
define( 'WPINC', 'wp-includes' );
require_once( ABSPATH . WPINC . '/load.php' );// 加载load.php // Standardize $_SERVER variables across setups.
wp_fix_server_vars();// Fix `$_SERVER` variables for various setups.为了处理`$_SERVER`的一些启动变量 require_once( ABSPATH . WPINC . '/functions.php' );// Main WordPress API,wordpress 的主要api $path = wp_guess_url() . '/wp-admin/setup-config.php'; /*
* We're going to redirect to setup-config.php. While this shouldn't result
* in an infinite loop, that's a silly thing to assume, don't you think? If
* we're traveling in circles, our last-ditch effort is "Need more help?"
*/
if ( false === strpos( $_SERVER['REQUEST_URI'], 'setup-config' ) ) {
header( 'Location: ' . $path );// 跳转到setup-config.php 进入用户配置模式,作者说想避免死循环;
exit;
}
// 已经跳走的话,还要做什么?有可能存在一种情况,执行setup-config.php 的时候执行到这里?其实接下来已经是在打印错误信息了
define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
require_once( ABSPATH . WPINC . '/version.php' );// 源码里面都没有这个文件啊 wp_check_php_mysql_versions();
wp_load_translations_early();// 大概是和国际化语言有关,具体不知道干嘛,但名字好搞笑,early 你妹啊 // Die with an error message
$die = sprintf(
/* translators: %s: wp-config.php */
__( "There doesn't seem to be a %s file. I need this before we can get started." ),
'<code>wp-config.php</code>'
) . '</p>';
$die .= '<p>' . sprintf(
/* translators: %s: Codex URL */
__( "Need more help? <a href='%s'>We got it</a>." ),
__( 'https://codex.wordpress.org/Editing_wp-config.php' )
) . '</p>';
$die .= '<p>' . sprintf(
/* translators: %s: wp-config.php */
__( "You can create a %s file through a web interface, but this doesn't work for all server setups. The safest way is to manually create the file." ),
'<code>wp-config.php</code>'
) . '</p>';
$die .= '<p><a href="' . $path . '" class="button button-large">' . __( "Create a Configuration File" ) . '</a>'; wp_die( $die, __( 'WordPress › Error' ) );// 打印错误信息
}