作曲家要求和使用非类文件 [英] composer require and use non-class file

问题描述

我是Composer的新手，我只是想不知道如何自动加载非基于类的文件。

I'm new to Composer and I just can't figure out on how to autoload non-class based files.

我尝试将文件添加到composer.json中的 files 数组中，然后运行 composer install 但我没有运气。

I have tried adding the file to the files array in composer.json and then running composer install but I had no luck.

我的composer.json看起来像：

My composer.json looks like:

{
  "name": "app",
  "description": "",
  "require": {
    "mongodb/mongodb": "^1.2"
  },
    "autoload":{
        "files":["src/lib/config.php"]
    }
}

这是基于非类的文件config.php

Here is the non-class based file, config.php

$foo = "Hello";

这就是我所说的：

require_once("vendor/autoload.php");

echo $foo;

以上抛出错误未定义变量：foo 。

或者文件可能被自动加载，或者我使用的是错误的命名空间。如果是这种情况，我将如何调用该文件。

Or perhaps the file might be autoloaded and maybe I could be in the wrong namespace. If this is the case, how would I call this file.

推荐答案

我不同意@MarkBaker的评论。实际上，文件将自动加载，但是无法在此类文件中声明变量。

I disagree with @MarkBaker comment. In fact file will be automatically loaded but it's impossible to declare variables in such files.

例如，如果您放入此 config.php 提供以下功能：

For example if you put into this config.php file the following function:

function hello()
{
   echo "hello world";
}

，而不显示 $ foo ，您将像这样调用此方法：

and instead of displaying $foo you will call this method like so:

hello();

您将得到预期的结果。

变量不可见的原因是通过Composer加载文件的方式：

The reason why variable is not visible is the way file is loaded via Composer:

function composerRequire4b299eb5732a472abef81c6ea06043af($fileIdentifier, $file)
{
    if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
        require $file;

        $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
    }
}

如您所见，方法内部需要文件，因此已全部定义变量仅在此方法中具有作用域，因此在此之后它们将不可见（这就是PHP的工作方式）。

As you see file is required inside method so all defined variables have scope only in this method so they won't be visible after that (this is how PHP works).

所以回答我们的问题是预期的行为。您不应该在Composer的自动加载文件中声明任何变量。如果您需要类似的功能，则应该手动要求文件。

So answering our question this is expected behavior. You shouldn't declare any variables in auto-loaded files by Composer. If you need similar functionality, you should require file manually.

当然，我认为您不应该在配置文件中声明变量。您应该返回设置数组，然后将此数组分配给全局 $ config 变量（最简单的解决方案），或者使用将保留这些设置并从此类中获取配置的类（某些方法例如是用Laravel制造的。）

Of course I don't think you should really declare variables in configuration files. You should rather return array of settings and then assign this array to global $config variable (simplest solution) or use class that will hold those settings and get configuration from this class (something like this is made in Laravel for example).

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