SignaKit Feature Flags — Laravel

Laravel service provider, facade, and manager for SignaKit Feature Flags. Wraps signakit/flags-php to give you idiomatic Laravel auto-discovery, config publishing, container binding, and a clean facade.

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Requirements

• PHP 8.1+
• Laravel 10, 11, or 12

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Installation

composer require signakit/flags-laravel

Add your SDK key to .env:

SIGNAKIT_SDK_KEY=sk_prod_yourOrgId_yourProjectId_random

Laravel's package auto-discovery registers the service provider and facade automatically — no manual changes to config/app.php are needed.

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Configuration

The package ships with sensible defaults. If you need to customise the config file, publish it first:

php artisan vendor:publish --tag=signakit-config

This creates config/signakit.php:

return [
    'sdk_key' => env('SIGNAKIT_SDK_KEY'),
];

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Quick Start

1. Facade in a controller

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\View\View;
use SignaKit\FlagsLaravel\Facades\SignaKit;

class CheckoutController extends Controller
{
    public function show(Request $request): View
    {
        $userContext = SignaKit::createUserContext(
            $request->user()->id,
            ['plan' => $request->user()->plan]
        );

        $decision = $userContext->decide('new-checkout');

        return view('checkout', [
            'useNewCheckout' => $decision->enabled,
        ]);
    }
}

2. Dependency injection

Type-hint SignaKitClient directly — the container resolves the singleton automatically:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\View\View;
use SignaKit\FlagsPhp\SignaKitClient;

class CheckoutController extends Controller
{
    public function __construct(
        private readonly SignaKitClient $signaKit,
    ) {}

    public function show(Request $request): View
    {
        $userContext = $this->signaKit->createUserContext(
            $request->user()->id,
            ['plan' => $request->user()->plan]
        );

        $decision = $userContext->decide('new-checkout');

        return view('checkout', [
            'useNewCheckout' => $decision->enabled,
        ]);
    }
}

Or inject SignaKitManager for the convenience forUser() shortcut:

use SignaKit\FlagsLaravel\SignaKitManager;

class CheckoutController extends Controller
{
    public function __construct(
        private readonly SignaKitManager $flags,
    ) {}

    public function show(Request $request): View
    {
        $userContext = $this->flags->forUser(
            $request->user()->id,
            ['plan' => $request->user()->plan]
        );

        $decision = $userContext->decide('new-checkout');

        return view('checkout', ['useNewCheckout' => $decision->enabled]);
    }
}

3. Middleware pattern

Evaluate flags once per request and share results with all views — useful when multiple controllers or Blade partials need the same flag values:

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\View;
use SignaKit\FlagsLaravel\Facades\SignaKit;
use Symfony\Component\HttpFoundation\Response;

class ShareFeatureFlags
{
    public function handle(Request $request, Closure $next): Response
    {
        if ($user = $request->user()) {
            $userContext = SignaKit::createUserContext(
                $user->id,
                ['plan' => $user->plan, 'role' => $user->role]
            );

            $decisions = $userContext->decideAll();

            // Share all flag decisions with every view for this request
            View::share('flags', $decisions);
        }

        return $next($request);
    }
}

Register the middleware in bootstrap/app.php (Laravel 11+):

->withMiddleware(function (Middleware $middleware) {
    $middleware->web(append: [
        \App\Http\Middleware\ShareFeatureFlags::class,
    ]);
})

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Blade Templates

Use the facade directly in Blade for simple one-off checks:

@php
    $userContext = \SignaKit\FlagsLaravel\Facades\SignaKit::createUserContext(
        auth()->id(),
        ['plan' => auth()->user()->plan]
    );
    $decision = $userContext->decide('new-checkout');
@endphp

@if ($decision->enabled)
    <x-new-checkout />
@else
    <x-legacy-checkout />
@endif

Or, if you are using the middleware pattern above, access the pre-resolved decisions via the shared $flags variable:

@if (isset($flags['new-checkout']) && $flags['new-checkout']->enabled)
    <x-new-checkout />
@else
    <x-legacy-checkout />
@endif

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API Reference

SignaKitClient

Resolved from the container as a singleton. All methods are available via the SignaKit facade.

Method	Description
createUserContext(string $userId, array $attributes = []): SignaKitUserContext	Create a user context for flag evaluation and event tracking

SignaKitUserContext

Returned by createUserContext().

Method	Description
decide(string $flagKey): Decision	Evaluate a single flag for this user
decideAll(): array<string, Decision>	Evaluate all flags for this user
trackEvent(string $eventKey, array $properties = []): void	Track a conversion or custom event

Decision

A readonly value object returned by decide().

Property	Type	Description
$flagKey	string	The flag key that was evaluated
$variationKey	string	Assigned variation key, or 'off' if the flag is stopped
$enabled	bool	true when the flag is running and the user is in an active variation
$ruleKey	?string	The targeting rule that matched, or null for default allocation

SignaKitManager

An optional helper bound in the container. Provides a forUser() shortcut:

Method	Description
forUser(string $userId, array $attributes = []): SignaKitUserContext	Resolves the client and creates a user context in one call

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License

MIT