1、实现效果

config(include_once $coreConfig); //加载配置文件

config()  //获取所有配置

config('DB_HOST')  获取配置

 

2、按层级配置文件加载，存取配置项 config,function.php

function config($var=NULL,$value=NULL){static $config=array();if(is_array($var)){//加载配置文件config.php$config=array_merge($config,array_change_key_case($var,CASE_UPPER));return ;}if(is_string($var)){//取值$var=strtoupper($var);if(!is_null($value)){$config[$var]=$value;return ;}return isset($config[$var])?$config[$var]:NULL;}if(is_null($var)&&is_null($value)){//获取所有配置return $config;}
}

3、引入三个配置config.php文件 KJ.php

   //加载文件private static function _import_file(){$fileArr=array(FILE_PATH.'/function.php',COMMON_PATH.'/function.php',MODULE_PATH.'/function.php',);foreach ($fileArr as $v){if(is_file($v)){require_once  $v;}}$coreConfig= FILE_PATH.'/config.php';$commonConfig= COMMON_PATH.'/config.php';$moduleConfig=MODULE_PATH.'/config.php';//加载配置文件 优先配置最外层配置if(is_file($coreConfig)) config(include_once $coreConfig);if(is_file($commonConfig)) config(include_once $commonConfig);if(is_file($moduleConfig)) config( include_once $moduleConfig);}

4、设置file及common下面config.php配置

<?php
return ['DB_HOST'=>'localhost',//数据库地址'DB_DATABASE'=>'aaa',//数据库'DB_USER'=>'root',//数据库账号'DB_PWD'=>'root',//数据库密码
];

5、数据库配置修改，取值ModelBase.php

  private function _connect(){if($this->pdo){return true;}$host = config('DB_HOST');$db = config('DB_DATABASE');$user = config('DB_USER');$pass =config('DB_PWD');$dsn = "mysql:host=$host;dbname=$db;charset=utf8";try {$this->pdo = new PDO($dsn, $user, $pass, [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);} catch (PDOException $e) {die("数据库连接失败: " . $e->getMessage());}}