Zanzibar PHP

Google Zanzibar-style authorization for PHP. Works with Laravel and Symfony.

Install

composer require sseffa/zanzibar-php

Quick Start

use Zanzibar\Zanzibar;
use Zanzibar\Config\NamespaceConfig;

$zanzibar = Zanzibar::create()
    ->withNamespace(
        NamespaceConfig::create('document')
            ->addRelation('owner')
            ->addRelationIncluding('editor', 'owner')
            ->addRelationIncluding('viewer', 'editor')
    )
    ->build();

// Grant permission
$zanzibar->allow('document:123', 'viewer', 'user:alice');

// Check permission
$zanzibar->can('document:123', 'viewer', 'user:alice'); // true

// Owner inherits editor and viewer
$zanzibar->allow('document:123', 'owner', 'user:bob');
$zanzibar->can('document:123', 'viewer', 'user:bob'); // true

Features

• Tuple-based model: (object, relation, subject)
• Relation inheritance: owner -> editor -> viewer
• Group permissions: group:team#member
• Wildcards: user:* for public access
• Exclusion: subscriber AND NOT banned
• Folder hierarchy: inherit permissions from parent

Laravel

Auto-discovered. Publish config:

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

// config/zanzibar.php
'namespaces' => [
    'document' => [
        'owner' => null,
        'editor' => 'owner',
        'viewer' => 'editor',
    ],
],

Usage:

use Zanzibar\Laravel\Facades\Zanzibar;

Zanzibar::allow('document:1', 'viewer', 'user:1');
Zanzibar::can('document:1', 'viewer', 'user:1');

Symfony

Register bundle:

// config/bundles.php
Zanzibar\Symfony\ZanzibarBundle::class => ['all' => true],

# config/packages/zanzibar.yaml
zanzibar:
    secret: '%env(APP_SECRET)%'
    namespaces:
        document:
            owner: ~
            editor: owner
            viewer: editor

Advanced

Group-based access

use Zanzibar\Core\SubjectRef;

$zanzibar->allow('group:team', 'member', 'user:alice');
$zanzibar->allow('document:1', 'viewer', SubjectRef::userset('group', 'team', 'member'));

$zanzibar->can('document:1', 'viewer', 'user:alice'); // true

Wildcard (public)

$zanzibar->allow('video:1', 'viewer', SubjectRef::wildcard('user'));
$zanzibar->can('video:1', 'viewer', 'user:anyone'); // true

Exclusion (banned users)

use Zanzibar\Config\Rewrite\{ComputedUserset, ExclusionUserset};

NamespaceConfig::create('channel')
    ->addRelation('subscriber')
    ->addRelation('banned')
    ->addRelationWithRewrite('can_view', new ExclusionUserset(
        base: new ComputedUserset('subscriber'),
        subtract: new ComputedUserset('banned'),
    ));

Folder hierarchy

use Zanzibar\Config\Rewrite\{DirectUserset, ComputedUserset, TupleToUserset, UnionUserset};

NamespaceConfig::create('folder')
    ->addRelation('parent')
    ->addRelationWithRewrite('viewer', new UnionUserset([
        new DirectUserset(),
        new TupleToUserset('parent', 'viewer'),
    ]));

$zanzibar->allow('folder:root', 'viewer', 'user:alice');
$zanzibar->allow('folder:child', 'parent', 'folder:root');
$zanzibar->can('folder:child', 'viewer', 'user:alice'); // true

Test

composer test

License

MIT