Laravel如何解析.env文件? [英] How does Laravel parse the .env file?

问题描述

我想模仿Laravel应用程序通过 .env 文件设置环境变量的方式.

I would like to mimic the way a Laravel application has it's environment variables set via a .env file.

APP_ENV=local
DB_DATABASE=fruits
DB_USERNAME=fruituser
DB_PASSWORD=secretpassword

因此它可以像这样在 config.php 中设置默认后备:

So it can then set default fallbacks in config.php like this:

return [
    'env' => env('APP_ENV', 'production'),
];

但是，我在浏览框架代码时难以找到解析 .env 中文本的位，并将其转换为适当的PHP变量.

However I am having trouble digging through the framework code to find the bit where it parses the text in .env and turns it into proper PHP variables.

我在 vendor \ laravel \ framework \ src \ Illuminate \ Foundation \ helpers.php 中找到了 env()帮助器函数的定义:

I have found the definition of the env() helper function in vendor\laravel\framework\src\Illuminate\Foundation\helpers.php:

function env($key, $default = null)
{
    $value = getenv($key);

    if ($value === false) {
        return value($default);

    }
...

...但是调用另一个名为 getenv()的全局帮助器函数，这就是线索变冷的地方.

...but that calls another global helper function called getenv() and that is where the trail goes cold.

我怀疑我们现在可能已经降到Symfony级别，但是可惜我找不到 getenv()的定义，您的帮助和指导将不胜感激.

I suspect we might be down to Symfony level now but alas I cannot find the definition of getenv() and your help and guidance would be greatly appreciated.

推荐答案

Laravel为此使用此库

Laravel Uses this libarary for it

https://github.com/vlucas/phpdotenv

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