PHPackages                             symplify/flex-loader - PHPackages - PHPackages  [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register)

1. [Directory](/)
2. /
3. [Utility & Helpers](/categories/utility)
4. /
5. symplify/flex-loader

Abandoned → [symfony/http-kernel](/?search=symfony%2Fhttp-kernel)ArchivedLibrary[Utility & Helpers](/categories/utility)

symplify/flex-loader
====================

Reduce Kernel Flex boiler code and use extra features

9.0.34(5y ago)654.2k↓60%MITPHPPHP >=7.3

Since Dec 18Pushed 5y ago1 watchersCompare

[ Source](https://github.com/deprecated-packages/flex-loader)[ Packagist](https://packagist.org/packages/symplify/flex-loader)[ Fund](https://www.paypal.me/rectorphp)[ GitHub Sponsors](https://github.com/tomasvotruba)[ RSS](/packages/symplify-flex-loader/feed)WikiDiscussions main Synced 3d ago

READMEChangelogDependencies (6)Versions (233)Used By (0)

Get Flex Loader code out of Kernel and Keep it Clean
====================================================

[](#get-flex-loader-code-out-of-kernel-and-keep-it-clean)

[![Downloads total](https://camo.githubusercontent.com/cc0174cbe3ac437ac815856ad33f39791f304136a82d72696dd89c3fd8953f97/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f73796d706c6966792f666c65782d6c6f616465722e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/symplify/flex-loader/stats)

Keep your Symfony `Kernel` clean from boiler plate code. It easier work with Kernel when you can easily separate your code from *the Flex code*.

Install
-------

[](#install)

```
composer require symplify/flex-loader
```

Usage
-----

[](#usage)

### Traditional Kernel (Before)

[](#traditional-kernel-before)

```
namespace App;

use Iterator;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Routing\RouteCollectionBuilder;

final class MyProjectKernel extends Kernel
{
    use MicroKernelTrait;

    /**
     * @var string
     */
    private const CONFIG_EXTS = '.{php,xml,yaml,yml}';

    public function registerBundles(): Iterator
    {
        $contents = require $this->getProjectDir() . '/config/bundles.php';
        foreach ($contents as $class => $envs) {
            if ($envs[$this->environment] ?? $envs['all'] ?? false) {
                yield new $class();
            }
        }
    }

    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader): void
    {
        $container->addResource(new FileResource($this->getProjectDir() . '/config/bundles.php'));
        $container->setParameter('container.dumper.inline_class_loader', true);
        $confDir = $this->getProjectDir() . '/config';
        $loader->load($confDir . '/{packages}/*' . self::CONFIG_EXTS, 'glob');
        $loader->load($confDir . '/{packages}/' . $this->environment . '/**/*' . self::CONFIG_EXTS, 'glob');
        $loader->load($confDir . '/{services}' . self::CONFIG_EXTS, 'glob');
        $loader->load($confDir . '/{services}_' . $this->environment . self::CONFIG_EXTS, 'glob');

        $loader->load(__DIR__ . '/optional/custom/path' . self::CONFIG_EXTS, 'glob');
    }

    protected function configureRoutes(RouteCollectionBuilder $routes): void
    {
        $confDir = $this->getProjectDir() . '/config';
        $routes->import($confDir . '/{routes}/*' . self::CONFIG_EXTS, '/', 'glob');
        $routes->import($confDir . '/{routes}/' . $this->environment . '/**/*' . self::CONFIG_EXTS, '/', 'glob');
        $routes->import($confDir . '/{routes}' . self::CONFIG_EXTS, '/', 'glob');

        $routes->import(__DIR__ . '/optional/custom/path' . self::CONFIG_EXTS, 'glob');
    }
}
```

### With Flex Loader (After)

[](#with-flex-loader-after)

```
namespace App;

use Iterator;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Routing\RouteCollectionBuilder;
use Symplify\FlexLoader\Flex\FlexLoader;

final class MyProjectKernel extends Kernel
{
    use MicroKernelTrait;

    /**
     * @var FlexLoader
     */
    private $flexLoader;

    public function __construct($environment, $debug)
    {
        parent::__construct($environment, $debug);

        $this->flexLoader = new FlexLoader($environment, $this->getProjectDir());
    }

    public function registerBundles(): Iterator
    {
        return $this->flexLoader->loadBundles();
    }

    protected function configureContainer(ContainerBuilder $containerBuilder, LoaderInterface $loader): void
    {
        $this->flexLoader->loadConfigs($containerBuilder, $loader, [__DIR__ . '/optional/custom/path/']);
    }

    protected function configureRoutes(RouteCollectionBuilder $routeCollectionBuilder): void
    {
        $this->flexLoader->loadRoutes($routeCollectionBuilder, [__DIR__ . '/optional/custom/path/']);
    }
}
```

Report Issues
-------------

[](#report-issues)

In case you are experiencing a bug or want to request a new feature head over to the [Symplify monorepo issue tracker](https://github.com/symplify/symplify/issues)

Contribute
----------

[](#contribute)

The sources of this package are contained in the Symplify monorepo. We welcome contributions for this package on [symplify/symplify](https://github.com/symplify/symplify).

###  Health Score

38

—

LowBetter than 85% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity30

Limited adoption so far

Community7

Small or concentrated contributor base

Maturity75

Established project with proven stability

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~3 days

Total

230

Last Release

1948d ago

Major Versions

v5.4.16 → v6.0.02019-05-28

v6.1.0 → v7.0.02019-11-23

v7.3.18 → v8.0.0-beta12020-05-16

8.3.48 → 9.0.0-BETA22020-11-14

PHP version history (5 changes)v5.2.18PHP ^7.1

v7.0.0PHP ^7.2

8.2.17PHP ^7.2|^8.0

8.3.0PHP >=7.2

9.0.0-rc1PHP >=7.3

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/924196?v=4)[Tomas Votruba](/maintainers/TomasVotruba)[@TomasVotruba](https://github.com/TomasVotruba)

---

Top Contributors

[![TomasVotruba](https://avatars.githubusercontent.com/u/924196?v=4)](https://github.com/TomasVotruba "TomasVotruba (4 commits)")

###  Code Quality

TestsPHPUnit

### Embed Badge

![Health badge](/badges/symplify-flex-loader/health.svg)

```
[![Health](https://phpackages.com/badges/symplify-flex-loader/health.svg)](https://phpackages.com/packages/symplify-flex-loader)
```

###  Alternatives

[symplify/monorepo-builder

Not only Composer tools to build a Monorepo.

5205.3M82](/packages/symplify-monorepo-builder)[codefog/contao-haste

haste extension for Contao Open Source CMS

42650.8k139](/packages/codefog-contao-haste)[spomky-labs/pwa-bundle

Progressive Web App Manifest Generator Bundle for Symfony.

6144.4k1](/packages/spomky-labs-pwa-bundle)[netgen/layouts-core

Netgen Layouts enables you to build and manage complex web pages in a simpler way and with less coding. This is the core of Netgen Layouts, its heart and soul.

3689.4k10](/packages/netgen-layouts-core)[netgen/content-browser

Netgen Content Browser is a Symfony bundle that provides an interface which selects items from any kind of backend and returns the IDs of selected items back to the calling code.

14112.1k8](/packages/netgen-content-browser)

PHPackages © 2026

[Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)