lrz0829/Thinkphp5整合excel导入导出/thinkphp/library/think/Env.php

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think;

class Env
{
    /**
     * 获取环境变量值
     * @param string    $name 环境变量名（支持二级 .号分割）
     * @param string    $default  默认值
     * @return mixed
     */
    public static function get($name, $default = null)
    {
        $result = getenv(ENV_PREFIX . strtoupper(str_replace('.', '_', $name)));
        if (false !== $result) {
            if ('false' === $result) {
                $result = false;
            } elseif ('true' === $result) {
                $result = true;
            }
            return $result;
        } else {
            return $default;
        }
    }
}