diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1d7a35..8d31838 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+## v2.2.0 - 2024.03.28
+
+### Added
+
+- Add utility functions to test the current environment ([#31](https://github.com/studiometa/wp-toolkit/pull/31))
+- Add a `FacetsManager` to easily filter content with `pre_get_posts` ([#32](https://github.com/studiometa/wp-toolkit/pull/32))
+- Add a `facets_get('key')` Twig function to easily get the value of a facets filter from the query string ([#32](https://github.com/studiometa/wp-toolkit/pull/32))
+
+### Fixed
+
+- Fix dependency conflict ([#32](https://github.com/studiometa/wp-toolkit/pull/32))
+
 ## v2.1.0 - 2024.03.12
 
 ### Added
diff --git a/composer.json b/composer.json
index 73f5073..3285ed5 100644
--- a/composer.json
+++ b/composer.json
@@ -6,20 +6,22 @@
   "require": {
     "php": "^8.1",
     "monolog/monolog": "^2.9|^3.0",
-    "psr/log": "^1.1",
+    "psr/log": "^1.1|^2.0|^3.0",
     "sentry/sentry": "^4.6",
     "studiometa/webpack-config": "^5.0",
     "symfony/http-foundation": "^6.4|^7.0",
     "symfony/yaml": "^6.4|^7.0",
+    "timber/timber": "^1.0|^2.0",
     "wecodemore/wordpress-early-hook": "^1.2"
   },
   "require-dev": {
-    "squizlabs/php_codesniffer": "^3.4",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
-    "szepeviktor/phpstan-wordpress": "^1.1",
     "php-stubs/wordpress-stubs": "^5.5",
     "phpunit/phpunit": "^9.0",
-    "yoast/phpunit-polyfills": "^1.0"
+    "squizlabs/php_codesniffer": "^3.4",
+    "szepeviktor/phpstan-wordpress": "^1.1",
+    "wp-phpunit/wp-phpunit": "^6.4",
+    "yoast/phpunit-polyfills": "^2.0"
   },
   "autoload": {
     "psr-4": {
@@ -40,14 +42,15 @@
       "@fix:style"
     ],
     "fix:style": "phpcbf",
-    "test": "phpunit"
+    "test": "XDEBUG_MODE=coverage phpunit"
   },
   "minimum-stability": "dev",
   "prefer-stable": true,
   "config": {
     "allow-plugins": {
       "dealerdirect/phpcodesniffer-composer-installer": true,
-      "phpstan/extension-installer": true
+      "phpstan/extension-installer": true,
+      "composer/installers": true
     },
     "sort-packages": true
   }
diff --git a/composer.lock b/composer.lock
index 379e41f..fa33d45 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "83e8d763f067b8b9f1332f4fb1a9bcd4",
+    "content-hash": "dbac66e2af21cca739607377fdf3b4a3",
     "packages": [
         {
             "name": "anahkiasen/html-object",
@@ -52,6 +52,151 @@
             },
             "time": "2017-05-31T07:52:45+00:00"
         },
+        {
+            "name": "composer/installers",
+            "version": "v2.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/installers.git",
+                "reference": "c29dc4b93137acb82734f672c37e029dfbd95b35"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/installers/zipball/c29dc4b93137acb82734f672c37e029dfbd95b35",
+                "reference": "c29dc4b93137acb82734f672c37e029dfbd95b35",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.0 || ^2.0",
+                "php": "^7.2 || ^8.0"
+            },
+            "require-dev": {
+                "composer/composer": "1.6.* || ^2.0",
+                "composer/semver": "^1 || ^3",
+                "phpstan/phpstan": "^0.12.55",
+                "phpstan/phpstan-phpunit": "^0.12.16",
+                "symfony/phpunit-bridge": "^5.3",
+                "symfony/process": "^5"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "Composer\\Installers\\Plugin",
+                "branch-alias": {
+                    "dev-main": "2.x-dev"
+                },
+                "plugin-modifies-install-path": true
+            },
+            "autoload": {
+                "psr-4": {
+                    "Composer\\Installers\\": "src/Composer/Installers"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Kyle Robinson Young",
+                    "email": "kyle@dontkry.com",
+                    "homepage": "https://github.com/shama"
+                }
+            ],
+            "description": "A multi-framework Composer library installer",
+            "homepage": "https://composer.github.io/installers/",
+            "keywords": [
+                "Dolibarr",
+                "Eliasis",
+                "Hurad",
+                "ImageCMS",
+                "Kanboard",
+                "Lan Management System",
+                "MODX Evo",
+                "MantisBT",
+                "Mautic",
+                "Maya",
+                "OXID",
+                "Plentymarkets",
+                "Porto",
+                "RadPHP",
+                "SMF",
+                "Starbug",
+                "Thelia",
+                "Whmcs",
+                "WolfCMS",
+                "agl",
+                "annotatecms",
+                "attogram",
+                "bitrix",
+                "cakephp",
+                "chef",
+                "cockpit",
+                "codeigniter",
+                "concrete5",
+                "croogo",
+                "dokuwiki",
+                "drupal",
+                "eZ Platform",
+                "elgg",
+                "expressionengine",
+                "fuelphp",
+                "grav",
+                "installer",
+                "itop",
+                "known",
+                "kohana",
+                "laravel",
+                "lavalite",
+                "lithium",
+                "magento",
+                "majima",
+                "mako",
+                "matomo",
+                "mediawiki",
+                "miaoxing",
+                "modulework",
+                "modx",
+                "moodle",
+                "osclass",
+                "pantheon",
+                "phpbb",
+                "piwik",
+                "ppi",
+                "processwire",
+                "puppet",
+                "pxcms",
+                "reindex",
+                "roundcube",
+                "shopware",
+                "silverstripe",
+                "sydes",
+                "sylius",
+                "tastyigniter",
+                "wordpress",
+                "yawik",
+                "zend",
+                "zikula"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/installers/issues",
+                "source": "https://github.com/composer/installers/tree/v2.2.0"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-08-20T06:45:11+00:00"
+        },
         {
             "name": "guzzlehttp/psr7",
             "version": "2.6.2",
@@ -229,42 +374,41 @@
         },
         {
             "name": "monolog/monolog",
-            "version": "2.9.1",
+            "version": "3.5.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Seldaek/monolog.git",
-                "reference": "f259e2b15fb95494c83f52d3caad003bbf5ffaa1"
+                "reference": "c915e2634718dbc8a4a15c61b0e62e7a44e14448"
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-                "reference": "f259e2b15fb95494c83f52d3caad003bbf5ffaa1",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/c915e2634718dbc8a4a15c61b0e62e7a44e14448",
+                "reference": "c915e2634718dbc8a4a15c61b0e62e7a44e14448",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.2",
-                "psr/log": "^1.0.1 || ^2.0 || ^3.0"
+                "php": ">=8.1",
+                "psr/log": "^2.0 || ^3.0"
             },
             "provide": {
-                "psr/log-implementation": "1.0.0 || 2.0.0 || 3.0.0"
+                "psr/log-implementation": "3.0.0"
             },
             "require-dev": {
-                "aws/aws-sdk-php": "^2.4.9 || ^3.0",
+                "aws/aws-sdk-php": "^3.0",
                 "doctrine/couchdb": "~1.0@dev",
                 "elasticsearch/elasticsearch": "^7 || ^8",
                 "ext-json": "*",
-                "graylog2/gelf-php": "^1.4.2 || ^2@dev",
-                "guzzlehttp/guzzle": "^7.4",
+                "graylog2/gelf-php": "^1.4.2 || ^2.0",
+                "guzzlehttp/guzzle": "^7.4.5",
                 "guzzlehttp/psr7": "^2.2",
                 "mongodb/mongodb": "^1.8",
                 "php-amqplib/php-amqplib": "~2.4 || ^3",
-                "phpspec/prophecy": "^1.15",
-                "phpstan/phpstan": "^0.12.91",
-                "phpunit/phpunit": "^8.5.14",
-                "predis/predis": "^1.1 || ^2.0",
-                "rollbar/rollbar": "^1.3 || ^2 || ^3",
+                "phpstan/phpstan": "^1.9",
+                "phpstan/phpstan-deprecation-rules": "^1.0",
+                "phpstan/phpstan-strict-rules": "^1.4",
+                "phpunit/phpunit": "^10.1",
+                "predis/predis": "^1.1 || ^2",
                 "ruflin/elastica": "^7",
-                "swiftmailer/swiftmailer": "^5.3|^6.0",
                 "symfony/mailer": "^5.4 || ^6",
                 "symfony/mime": "^5.4 || ^6"
             },
@@ -287,7 +431,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-main": "2.x-dev"
+                    "dev-main": "3.x-dev"
                 }
             },
             "autoload": {
@@ -315,7 +459,7 @@
             ],
             "support": {
                 "issues": "https://github.com/Seldaek/monolog/issues",
-                "source": "https://github.com/Seldaek/monolog/tree/2.9.1"
+                "source": "https://github.com/Seldaek/monolog/tree/3.5.0"
             },
             "funding": [
                 {
@@ -327,7 +471,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-02-06T13:44:46+00:00"
+            "time": "2023-10-27T15:32:31+00:00"
         },
         {
             "name": "psr/http-factory",
@@ -439,30 +583,30 @@
         },
         {
             "name": "psr/log",
-            "version": "1.1.4",
+            "version": "3.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/log.git",
-                "reference": "d49695b909c3b7628b6289db5479a1c204601f11"
+                "reference": "fe5ea303b0887d5caefd3d431c3e61ad47037001"
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                 "type": "zip",
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-                "reference": "d49695b909c3b7628b6289db5479a1c204601f11",
+                "url": "https://api.github.com/repos/php-fig/log/zipball/fe5ea303b0887d5caefd3d431c3e61ad47037001",
+                "reference": "fe5ea303b0887d5caefd3d431c3e61ad47037001",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.0"
+                "php": ">=8.0.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1.x-dev"
+                    "dev-master": "3.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Psr\\Log\\": "Psr/Log/"
+                    "Psr\\Log\\": "src"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -483,9 +627,9 @@
                 "psr-3"
             ],
             "support": {
-                "source": "https://github.com/php-fig/log/tree/1.1.4"
+                "source": "https://github.com/php-fig/log/tree/3.0.0"
             },
-            "time": "2021-05-03T11:20:27+00:00"
+            "time": "2021-07-14T16:46:02+00:00"
         },
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@@ -1403,8 +1547,164 @@
                 "issues": "https://github.com/tighten/collect/issues",
                 "source": "https://github.com/tighten/collect/tree/v8.83.27"
             },
+            "abandoned": "illuminate/collections",
             "time": "2023-01-13T18:05:42+00:00"
         },
+        {
+            "name": "timber/timber",
+            "version": "2.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/timber/timber.git",
+                "reference": "ee467c650e51d042a04d9107f35239cbc566d4d7"
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+                "url": "https://api.github.com/repos/timber/timber/zipball/ee467c650e51d042a04d9107f35239cbc566d4d7",
+                "reference": "ee467c650e51d042a04d9107f35239cbc566d4d7",
+                "shasum": ""
+            },
+            "require": {
+                "composer/installers": "^1.0 || ^2.0",
+                "php": "^7.4 || ^8.0",
+                "symfony/polyfill-php80": "^1.27",
+                "twig/twig": "^2.15.3 || ^3.0"
+            },
+            "require-dev": {
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+                "php-parallel-lint/php-parallel-lint": "^1.3",
+                "php-stubs/acf-pro-stubs": "^5.12",
+                "php-stubs/wp-cli-stubs": "^2.0",
+                "phpro/grumphp": "^1.12",
+                "phpstan/extension-installer": "^1.1",
+                "phpstan/phpstan": "^1.7",
+                "squizlabs/php_codesniffer": "^3.0",
+                "symplify/easy-coding-standard": "^12.0",
+                "szepeviktor/phpstan-wordpress": "^1.1",
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+                "wpackagist-plugin/advanced-custom-fields": "^5.0 || ^6.0",
+                "wpackagist-plugin/co-authors-plus": "^3.3",
+                "yoast/wp-test-utils": "^1.0"
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+            "suggest": {
+                "php-coveralls/php-coveralls": "^2.0 for code coverage",
+                "twig/cache-extra": "For using the cache tag in Twig"
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+            "type": "library",
+            "autoload": {
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+                    "Timber\\": "src/"
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+                    "email": "jared@upstatement.com",
+                    "homepage": "http://upstatement.com"
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+                    "email": "connorjburton@gmail.com",
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+                "themes",
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+                "twig"
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+                "issues": "https://github.com/timber/timber/issues",
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+                    "type": "open_collective"
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+            "time": "2023-11-09T08:30:32+00:00"
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+        {
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+            "version": "v3.8.0",
+            "source": {
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+                "url": "https://github.com/twigphp/Twig.git",
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+            "type": "library",
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+            "notification-url": "https://packagist.org/downloads/",
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+            "authors": [
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+                    "email": "fabien@symfony.com",
+                    "homepage": "http://fabien.potencier.org",
+                    "role": "Lead Developer"
+                },
+                {
+                    "name": "Twig Team",
+                    "role": "Contributors"
+                },
+                {
+                    "name": "Armin Ronacher",
+                    "email": "armin.ronacher@active-4.com",
+                    "role": "Project Founder"
+                }
+            ],
+            "description": "Twig, the flexible, fast, and secure template language for PHP",
+            "homepage": "https://twig.symfony.com",
+            "keywords": [
+                "templating"
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+            "support": {
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@@ -1896,16 +2196,16 @@
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@@ -1954,7 +2254,7 @@
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@@ -2277,16 +2577,16 @@
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-            "version": "9.6.17",
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-                "reference": "1a156980d78a6666721b7e8e8502fe210b587fcd"
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-                "reference": "1a156980d78a6666721b7e8e8502fe210b587fcd",
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@@ -2360,7 +2660,7 @@
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-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.6.17"
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@@ -2376,7 +2676,7 @@
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             ],
-            "time": "2024-02-23T13:14:51+00:00"
+            "time": "2024-03-21T12:07:32+00:00"
         },
         {
             "name": "sebastian/cli-parser",
@@ -3180,16 +3480,16 @@
         },
         {
             "name": "sebastian/resource-operations",
-            "version": "3.0.3",
+            "version": "3.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/resource-operations.git",
-                "reference": "0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8"
+                "reference": "05d5692a7993ecccd56a03e40cd7e5b09b1d404e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8",
-                "reference": "0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/05d5692a7993ecccd56a03e40cd7e5b09b1d404e",
+                "reference": "05d5692a7993ecccd56a03e40cd7e5b09b1d404e",
                 "shasum": ""
             },
             "require": {
@@ -3201,7 +3501,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.0-dev"
+                    "dev-main": "3.0-dev"
                 }
             },
             "autoload": {
@@ -3222,8 +3522,7 @@
             "description": "Provides a list of PHP built-in functions that operate on resources",
             "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
             "support": {
-                "issues": "https://github.com/sebastianbergmann/resource-operations/issues",
-                "source": "https://github.com/sebastianbergmann/resource-operations/tree/3.0.3"
+                "source": "https://github.com/sebastianbergmann/resource-operations/tree/3.0.4"
             },
             "funding": [
                 {
@@ -3231,7 +3530,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-09-28T06:45:17+00:00"
+            "time": "2024-03-14T16:00:52+00:00"
         },
         {
             "name": "sebastian/type",
@@ -3500,16 +3799,16 @@
         },
         {
             "name": "szepeviktor/phpstan-wordpress",
-            "version": "v1.3.3",
+            "version": "v1.3.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/szepeviktor/phpstan-wordpress.git",
-                "reference": "f7ff091331bc00c5688fe4ce0c4d51d06fa61553"
+                "reference": "891d0767855a32c886a439efae090408cc1fa156"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/szepeviktor/phpstan-wordpress/zipball/f7ff091331bc00c5688fe4ce0c4d51d06fa61553",
-                "reference": "f7ff091331bc00c5688fe4ce0c4d51d06fa61553",
+                "url": "https://api.github.com/repos/szepeviktor/phpstan-wordpress/zipball/891d0767855a32c886a439efae090408cc1fa156",
+                "reference": "891d0767855a32c886a439efae090408cc1fa156",
                 "shasum": ""
             },
             "require": {
@@ -3556,9 +3855,9 @@
             ],
             "support": {
                 "issues": "https://github.com/szepeviktor/phpstan-wordpress/issues",
-                "source": "https://github.com/szepeviktor/phpstan-wordpress/tree/v1.3.3"
+                "source": "https://github.com/szepeviktor/phpstan-wordpress/tree/v1.3.4"
             },
-            "time": "2024-02-26T13:55:50+00:00"
+            "time": "2024-03-21T16:32:59+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -3610,23 +3909,71 @@
             ],
             "time": "2024-03-03T12:36:25+00:00"
         },
+        {
+            "name": "wp-phpunit/wp-phpunit",
+            "version": "6.4.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/wp-phpunit/wp-phpunit.git",
+                "reference": "aa3c8f5d1b7efc295fd2b37c7264d2356a8c1099"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/wp-phpunit/wp-phpunit/zipball/aa3c8f5d1b7efc295fd2b37c7264d2356a8c1099",
+                "reference": "aa3c8f5d1b7efc295fd2b37c7264d2356a8c1099",
+                "shasum": ""
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "__loaded.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Evan Mattson",
+                    "email": "me@aaemnnost.tv"
+                },
+                {
+                    "name": "WordPress Community",
+                    "homepage": "https://wordpress.org/about/"
+                }
+            ],
+            "description": "WordPress core PHPUnit library",
+            "homepage": "https://github.com/wp-phpunit",
+            "keywords": [
+                "phpunit",
+                "test",
+                "wordpress"
+            ],
+            "support": {
+                "docs": "https://github.com/wp-phpunit/docs",
+                "issues": "https://github.com/wp-phpunit/issues",
+                "source": "https://github.com/wp-phpunit/wp-phpunit"
+            },
+            "time": "2023-12-07T00:50:08+00:00"
+        },
         {
             "name": "yoast/phpunit-polyfills",
-            "version": "1.1.0",
+            "version": "2.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Yoast/PHPUnit-Polyfills.git",
-                "reference": "224e4a1329c03d8bad520e3fc4ec980034a4b212"
+                "reference": "c758753e8f9dac251fed396a73c8305af3f17922"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Yoast/PHPUnit-Polyfills/zipball/224e4a1329c03d8bad520e3fc4ec980034a4b212",
-                "reference": "224e4a1329c03d8bad520e3fc4ec980034a4b212",
+                "url": "https://api.github.com/repos/Yoast/PHPUnit-Polyfills/zipball/c758753e8f9dac251fed396a73c8305af3f17922",
+                "reference": "c758753e8f9dac251fed396a73c8305af3f17922",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4",
-                "phpunit/phpunit": "^4.8.36 || ^5.7.21 || ^6.0 || ^7.0 || ^8.0 || ^9.0"
+                "php": ">=5.6",
+                "phpunit/phpunit": "^5.7.21 || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0"
             },
             "require-dev": {
                 "yoast/yoastcs": "^2.3.0"
@@ -3668,7 +4015,7 @@
                 "issues": "https://github.com/Yoast/PHPUnit-Polyfills/issues",
                 "source": "https://github.com/Yoast/PHPUnit-Polyfills"
             },
-            "time": "2023-08-19T14:25:08+00:00"
+            "time": "2023-06-06T20:28:24+00:00"
         }
     ],
     "aliases": [],
diff --git a/src/Helpers/Env.php b/src/Helpers/Env.php
index 5f92efe..785506e 100644
--- a/src/Helpers/Env.php
+++ b/src/Helpers/Env.php
@@ -19,4 +19,67 @@ public static function get(string $key): string
         // so we use `getenv` as a fallback to try and get the value.
         return $env[ $key ] ?? (string) getenv($key);
     }
+
+    /**
+     * Get the current APP_ENV configuration.
+     *
+     * @return string
+     */
+    private static function get_app_env(): string
+    {
+        return strtolower(self::get('APP_ENV'));
+    }
+
+    /**
+     * Test if the current environment is production.
+     * Both `production` and `prod` values are tested on the `APP_ENV` or
+     * `WP_ENV` environment variable or the `WP_ENV` constant.
+     *
+     * @return bool
+     */
+    public static function is_prod(): bool
+    {
+        $env = self::get_app_env();
+        return $env === 'production' || $env === 'prod';
+    }
+
+    /**
+     * Test if the current environment is preprod.
+     *
+     * @return bool
+     */
+    public static function is_preprod(): bool
+    {
+        return self::get_app_env() === 'preprod';
+    }
+
+    /**
+     * Test if the current environment is local.
+     *
+     * @return bool
+     */
+    public static function is_local(): bool
+    {
+        return self::get_app_env() === 'local';
+    }
+
+    /**
+     * Test if the current environment is staging.
+     *
+     * @return bool
+     */
+    public static function is_staging(): bool
+    {
+        return self::get_app_env() === 'staging';
+    }
+
+    /**
+     * Test if the current environment is development.
+     *
+     * @return bool
+     */
+    public static function is_development(): bool
+    {
+        return self::get_app_env() === 'development';
+    }
 }
diff --git a/src/Managers/FacetsManager.php b/src/Managers/FacetsManager.php
new file mode 100644
index 0000000..db4e90c
--- /dev/null
+++ b/src/Managers/FacetsManager.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * Bootstraps Admin related functions.
+ *
+ * @package Studiometa
+ */
+
+namespace Studiometa\WPToolkit\Managers;
+
+use WP_Query;
+use Timber\Timber;
+use Twig\Environment;
+use Twig\TwigFunction;
+use Studiometa\WPToolkit\Managers\ManagerInterface;
+use function Studiometa\WPToolkit\request;
+
+/** Class */
+class FacetsManager implements ManagerInterface
+{
+    /**
+     * The facets filters data, from a GET or a POST request.
+     *
+     * @var null|array
+     */
+    private ?array $facets;
+
+    /**
+     * Constructor.
+     *
+     * @param int $pre_get_posts_priority Set the priority parameter for the `pre_get_posts` action.
+     */
+    public function __construct(
+        public int $pre_get_posts_priority = 10,
+    ) {
+        $facets       = request()->get('facets');
+        $this->facets = is_array($facets) ? $facets : null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function run()
+    {
+        add_filter('timber/twig', array( $this, 'add_twig_helpers' ));
+
+        if (is_array($this->facets)) {
+            add_action('pre_get_posts', array( $this, 'add_facets_to_query' ), $this->pre_get_posts_priority);
+        }
+    }
+
+    /**
+     * Add facets defined as get or post parameters from the request to the main WP Query.
+     * For the list of available parameters, see the documentation for `WP_Query` linked below.
+     *
+     * @see https://developer.wordpress.org/reference/classes/wp_query/#parameters
+     *
+     * @param WP_Query $query The query for the current request.
+     * @return void
+     */
+    public function add_facets_to_query(WP_Query &$query): void
+    {
+        if (!is_array($this->facets)) {
+            return;
+        }
+
+        foreach ($this->facets as $query_var => $value) {
+            $query->query_vars[ $query_var ] = $value;
+        }
+    }
+
+    /**
+     * Add Twig helpers to get parameters values.
+     *
+     * @param Environment $twig The Twig environment.
+     * @return Environment
+     */
+    public function add_twig_helpers(Environment $twig): Environment
+    {
+        $twig->addFunction(
+            new TwigFunction(
+                'facets_get',
+                fn(string $parameter) => $this->facets[ $parameter ] ?? null,
+            )
+        );
+
+        return $twig;
+    }
+}
diff --git a/src/helpers.php b/src/helpers.php
index 72c6bd4..dfbcbaf 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -22,6 +22,46 @@ function env(string $key): string
     return Env::get($key);
 }
 
+/**
+ * Test if the current environment is prod.
+ */
+function env_is_prod(): bool
+{
+    return Env::is_prod();
+}
+
+/**
+ * Test if the current environment is preprod.
+ */
+function env_is_preprod(): bool
+{
+    return Env::is_preprod();
+}
+
+/**
+ * Test if the current environment is local.
+ */
+function env_is_local(): bool
+{
+    return Env::is_local();
+}
+
+/**
+ * Test if the current environment is staging.
+ */
+function env_is_staging(): bool
+{
+    return Env::is_staging();
+}
+
+/**
+ * Test if the current environment is development.
+ */
+function env_is_development(): bool
+{
+    return Env::is_development();
+}
+
 /**
  * Get a Request instance from the symfony/http-foundation package.
  *
diff --git a/tests/Helpers/EnvTest.php b/tests/Helpers/EnvTest.php
index a986ecc..1916bd4 100644
--- a/tests/Helpers/EnvTest.php
+++ b/tests/Helpers/EnvTest.php
@@ -2,14 +2,14 @@
 
 namespace Studiometa\WPToolkitTest;
 
-use WP_UnitTestCase;
-use Studiometa\WPToolkit\Helpers\Env as EnvClass;
+use PHPUnit\Framework\TestCase;
+use Studiometa\WPToolkit\Helpers\Env;
 use function Studiometa\WPToolkit\env;
 
 /**
  * EnvTest test case.
  */
-class EnvTest extends WP_UnitTestCase
+class EnvTest extends TestCase
 {
 
     /**
@@ -20,6 +20,33 @@ class EnvTest extends WP_UnitTestCase
     public function test_type_of_request_function_helper()
     {
         $this->assertTrue(is_string(env('missing')));
-        $this->assertTrue(is_string(EnvClass::get('missing')));
+        $this->assertTrue(is_string(Env::get('missing')));
+    }
+
+    /**
+     * Test the `env_is_...` functions and methods.
+     *
+     * @return void
+     */
+    public function test_env_is_functions()
+    {
+        $mapping = [
+            'is_local'       => 'local',
+            'is_prod'        => 'production',
+            'is_prod'        => 'prod',
+            'is_preprod'     => 'preprod',
+            'is_development' => 'development',
+            'is_staging'     => 'staging',
+        ];
+
+        foreach ($mapping as $name => $value) {
+            $fn = sprintf('\Studiometa\WPToolkit\env_%s', $name);
+            $_ENV['APP_ENV'] = strtolower($value);
+            $this->assertTrue($fn());
+            $this->assertTrue(Env::$name());
+            $_ENV['APP_ENV'] = strtoupper($value);
+            $this->assertTrue($fn());
+            $this->assertTrue(Env::$name());
+        }
     }
 }
diff --git a/tests/Managers/FacetsManagerTest.php b/tests/Managers/FacetsManagerTest.php
new file mode 100644
index 0000000..195811b
--- /dev/null
+++ b/tests/Managers/FacetsManagerTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Studiometa\WPToolkitTest;
+
+use WP_Query;
+use WP_UnitTestCase;
+use Studiometa\WPToolkit\Managers\FacetsManager;
+use Twig\Environment;
+use Twig\Loader\ArrayLoader;
+use Twig\TwigFunction;
+
+use function Studiometa\WPToolkit\request;
+
+/**
+ * FacetsManagerTest test case.
+ */
+class FacetsManagerTest extends WP_UnitTestCase
+{
+    public function test_it_should_add_query_vars_to_wp_query()
+    {
+        request()->query->set('facets', ['cat' => 1]);
+        $manager = new FacetsManager();
+        $manager->run();
+
+        $this->go_to('/?facets[cat]=1');
+        global $wp_query;
+
+        $this->assertTrue($wp_query instanceof WP_Query);
+        $this->assertTrue($wp_query->query_vars['cat'] === 1);
+    }
+
+    public function test_it_should_not_add_query_vars_to_wp_query()
+    {
+        request()->query->remove('facets');
+        (new FacetsManager())->run();
+        $this->go_to('/?facets[cat]=1');
+        global $wp_query;
+
+        $this->assertTrue($wp_query instanceof WP_Query);
+        $this->assertFalse($wp_query->query_vars['cat'] === 1);
+    }
+
+    public function test_it_should_add_a_twig_helper_function()
+    {
+        request()->query->set('facets', ['cat' => 2]);
+        $loader = new ArrayLoader();
+        $twig = new Environment($loader);
+        $manager = new FacetsManager();
+        $twig = $manager->add_twig_helpers($twig);
+        $function = $twig->getFunction('facets_get');
+        $this->assertTrue($function instanceof TwigFunction);
+        $this->assertTrue($function->getCallable()('cat') === 2);
+    }
+}