thinkphp/library/think/Env.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think;

class Env
{
    /**
     * 环境变量数据
     * @var array
     */
    protected $data = [];

    public function __construct()
    {
        $this->data = $_ENV;
    }

    /**
     * 读取环境变量定义文件
     * @access public
     * @param  string    $file  环境变量定义文件
     * @return void
     */
    public function load($file)
    {
        $env = parse_ini_file($file, true);
        $this->set($env);
    }

    /**
     * 获取环境变量值
     * @access public
     * @param  string    $name 环境变量名
     * @param  mixed     $default  默认值
     * @return mixed
     */
    public function get($name = null, $default = null, $php_prefix = true)
    {
        if (is_null($name)) {
            return $this->data;
        }

        $name = strtoupper(str_replace('.', '_', $name));

        if (isset($this->data[$name])) {
            return $this->data[$name];
        }

        return $this->getEnv($name, $default, $php_prefix);
    }