Composer: Fatal error: Uncaught Error: Call to undefined function

Question

我将自己的函数存储在 helpers 文件夹中相对于 composer.json 文件的 helpers.php 文件中。

<?php

function config (string $params){}

function redirect() {}

在文件 composer.json 中，此文件包含在 autoload

中

"autoload": {
    "psr-4": {
      "App\" : "./app"
    },
    "files": [
      "helpers/helpers.php"
    ],
  "scripts": {
    "delete-all-tables": "App\Migrations\DeleteTable::deleteAllTables",
  }
}

连接helpers后我用了composer-dump。

我在这个位置使用 config ()：

<?php

namespace App\Migrations;

use App\Components\Migration;

class DeleteTable extends Migration
{
    public static function deleteAllTables()
    {
        $param = config('db.dbname');

        $instance = new self();
        $instance->con->query("DROP DATABASE " . $param . "; CREATE DATABASE " . $param . "; USE " . $param . ";");
    }
}

当不通过作曲家在 Migration class 中使用我的函数时，一切正常，但是当通过 Terminal 调用 scripts 命令时，config 函数未执行。然后出现错误：

Fatal error: Uncaught Error: Call to undefined function App\Migrations\config() in D:\OSPanel\domains\myshop\app\Migrations\DeleteTable.php:17
Stack trace:
#0 phar://C:/composer/composer.phar/src/Composer/EventDispatcher/EventDispatcher.php(324): App\Migrations\DeleteTable::deleteAllTables(Object(Composer\Script\Event))
#1 phar://C:/composer/composer.phar/src/Composer/EventDispatcher/EventDispatcher.php(218): Composer\EventDispatcher\EventDispatcher->executeEventPhpScript('App\Migrations\...', 'dele
teAllTables', Object(Composer\Script\Event))
#2 phar://C:/composer/composer.phar/src/Composer/EventDispatcher/EventDispatcher.php(101): Composer\EventDispatcher\EventDispatcher->doDispatch(Object(Composer\Script\Event))
#3 phar://C:/composer/composer.phar/src/Composer/Command/ScriptAliasCommand.php(64): Composer\EventDispatcher\EventDispatcher->dispatchScript('delete-all-tabl...', true, Array)
#4 phar://C:/composer/composer.phar/vendor/symfony/console/Command/Command.php(245): Composer\Command\ScriptAliasCommand->execute(Obje in D:\OSPanel\domains\myshop\app\Migrations\Delet
eTable.php on line 11

你能告诉我我做错了什么吗？

在 class 中是否有任何选项可以在不使用助手的情况下解决问题？非常感谢您的帮助！

Answer 1

根据 Composer documentation:

Callbacks can only autoload classes from psr-0, psr-4 and classmap definitions. If a defined callback relies on functions defined outside of a class, the callback itself is responsible for loading the file containing these functions.

因此通常作为 files 自动加载器类型的一部分包含的任何文件都不会包含在这种特定情况下。

据我所知，要解决这个问题，您有两个选择：

将辅助函数作为 static 成员函数移动到辅助函数 class 中，并通过 Composer 自动加载机制（psr-0 或 psr-4）加载它
确定 helpers.php 文件和 require 在迁移文件中的位置

首先，它看起来像（在 app/Helpers.php 中）：

<?php

namespace App;

class Helper {
  static function config (string $params){}

  static function redirect() {}
}

这样称呼：

\App\Helpers::config('db.dbname');

第二，从 37925437 中汲取灵感，您的 DeleteTable.php 可能会变成这样：

<?php

namespace App\Migrations;

use App\Components\Migration;

class DeleteTable extends Migration
{
    public static function deleteAllTables()
    {
        require(dirname(\Composer\Factory::getComposerFile()) . '/helpers/helpers.php');

        $param = config('db.dbname');

        $instance = new self();
        $instance->con->query("DROP DATABASE " . $param . "; CREATE DATABASE " . $param . "; USE " . $param . ";");
    }
}

Composer: Fatal error: Uncaught Error: Call to undefined function

Composer: Fatal error: Uncaught Error: Call to undefined function

php

composer-php