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

Question

I have my own functions stored in the helpers.php file in the helpers folder relative to the composer.json file.

<?php

function config (string $params){}

function redirect() {}

In the file composer.json this file is included in autoload

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

I used composer-dump after connecting helpers .

I am using config () at this location:

<?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 . ";");
    }
}

When using my functions in the Migration class not through the composer, everything works correctly, but when calling scripts commands through Terminal , the config function is not executed. Then the error appears:

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

Can you please tell me what am I doing wrong?

Are there any options for solving the problem without using helpers in the class? Thank you very much for your help!

Answer 1

According to the 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.

so any files normally included as part of a files autoloader type won't be included in this specific case.

As I see it, to get around this you have two options:

• Move the helper functions into a helper class as static member functions and have that loaded via the Composer autoload mechanism (either psr-0 or psr-4)
• Determine the location of the helpers.php file and require that in the migration file

For the first, it would look something like (in app/Helpers.php ):

<?php

namespace App;

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

  static function redirect() {}
}

which would be called thus:

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

In the second, taking inspiration from 37925437 , your DeleteTable.php could end up something like:

<?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 . ";");
    }
}