diff --git a/site/app/Admin/Presenters/PulsePresenter.php b/site/app/Admin/Presenters/PulsePresenter.php
index 39a097868..b587b0c9d 100644
--- a/site/app/Admin/Presenters/PulsePresenter.php
+++ b/site/app/Admin/Presenters/PulsePresenter.php
@@ -9,7 +9,7 @@
 class PulsePresenter extends BasePresenter
 {
 
-	private const NEW_DISCLOSURES = 3;
+	private const int NEW_DISCLOSURES = 3;
 
 
 	public function __construct(
diff --git a/site/app/Application/Bootstrap.php b/site/app/Application/Bootstrap.php
index d277d8607..67bc50d30 100644
--- a/site/app/Application/Bootstrap.php
+++ b/site/app/Application/Bootstrap.php
@@ -15,10 +15,10 @@
 class Bootstrap
 {
 
-	private const MODE_DEVELOPMENT = 'development';
-	private const SITE_DIR = __DIR__ . '/../..';
-	private const DEBUG = '--debug';
-	private const COLORS = '--colors';
+	private const string MODE_DEVELOPMENT = 'development';
+	private const string SITE_DIR = __DIR__ . '/../..';
+	private const string DEBUG = '--debug';
+	private const string COLORS = '--colors';
 
 
 	public static function boot(): Container
diff --git a/site/app/Application/Locale/LocaleLinkGenerator.php b/site/app/Application/Locale/LocaleLinkGenerator.php
index 23d442584..762ec1e6d 100644
--- a/site/app/Application/Locale/LocaleLinkGenerator.php
+++ b/site/app/Application/Locale/LocaleLinkGenerator.php
@@ -18,7 +18,7 @@
 class LocaleLinkGenerator
 {
 
-	private const DEFAULT_PARAMS = '*';
+	private const string DEFAULT_PARAMS = '*';
 
 
 	/**
diff --git a/site/app/Application/Routing/RouterFactory.php b/site/app/Application/Routing/RouterFactory.php
index 252dc2885..2148d136e 100644
--- a/site/app/Application/Routing/RouterFactory.php
+++ b/site/app/Application/Routing/RouterFactory.php
@@ -13,17 +13,17 @@
 class RouterFactory
 {
 
-	private const MODULE_ADMIN = 'Admin';
-	private const MODULE_API = 'Api';
-	private const MODULE_HEARTBLEED = 'Webleed';
-	private const MODULE_PULSE = 'Pulse';
-	private const MODULE_UPC = 'UpcKeys';
-	private const MODULE_WWW = 'Www';
+	private const string MODULE_ADMIN = 'Admin';
+	private const string MODULE_API = 'Api';
+	private const string MODULE_HEARTBLEED = 'Webleed';
+	private const string MODULE_PULSE = 'Pulse';
+	private const string MODULE_UPC = 'UpcKeys';
+	private const string MODULE_WWW = 'Www';
 
 	/**
 	 * Module names mapped to hostnames.
 	 */
-	private const HOSTS = [
+	private const array HOSTS = [
 		self::MODULE_ADMIN => 'admin',
 		self::MODULE_API => 'api',
 		self::MODULE_HEARTBLEED => 'heartbleed',
@@ -32,7 +32,7 @@ class RouterFactory
 		self::MODULE_WWW => 'www',
 	];
 
-	private const ROOT_ONLY = '';
+	private const string ROOT_ONLY = '';
 
 	/** @var array<string, array<string, array<string, string>>> */
 	private array $translatedPresenters = [];
diff --git a/site/app/Application/Theme.php b/site/app/Application/Theme.php
index 4b63967d5..8ad288945 100644
--- a/site/app/Application/Theme.php
+++ b/site/app/Application/Theme.php
@@ -9,9 +9,9 @@
 readonly class Theme
 {
 
-	private const DARK = 'dark';
+	private const string DARK = 'dark';
 
-	private const LIGHT = 'bright';
+	private const string LIGHT = 'bright';
 
 
 	public function __construct(
diff --git a/site/app/CompanyInfo/CompanyRegisterRegisterUz.php b/site/app/CompanyInfo/CompanyRegisterRegisterUz.php
index 4fe0f1b36..9045c774a 100644
--- a/site/app/CompanyInfo/CompanyRegisterRegisterUz.php
+++ b/site/app/CompanyInfo/CompanyRegisterRegisterUz.php
@@ -22,9 +22,9 @@
 readonly class CompanyRegisterRegisterUz implements CompanyRegister
 {
 
-	private const DAY_ONE = '1993-01-01';
+	private const string DAY_ONE = '1993-01-01';
 
-	private const COUNTRY_CODE = 'sk';
+	private const string COUNTRY_CODE = 'sk';
 
 
 	public function __construct(
diff --git a/site/app/DateTime/DateTime.php b/site/app/DateTime/DateTime.php
index 6398f20ef..4b07e2a57 100644
--- a/site/app/DateTime/DateTime.php
+++ b/site/app/DateTime/DateTime.php
@@ -13,7 +13,7 @@ class DateTime
 	/**
 	 * Same as DATE_RFC3339_EXTENDED except it uses microseconds (`.u`) instead of milliseconds (`.v`).
 	 */
-	public const DATE_RFC3339_MICROSECONDS = 'Y-m-d\TH:i:s.uP';
+	public const string DATE_RFC3339_MICROSECONDS = 'Y-m-d\TH:i:s.uP';
 
 
 	public function getDaysFromString(string $interval): int
diff --git a/site/app/DateTime/DateTimeFormatter.php b/site/app/DateTime/DateTimeFormatter.php
index b783a5c74..f9009ad7b 100644
--- a/site/app/DateTime/DateTimeFormatter.php
+++ b/site/app/DateTime/DateTimeFormatter.php
@@ -10,19 +10,19 @@
 readonly class DateTimeFormatter
 {
 
-	private const DATE_DAY = 'day';
-	private const DATE_MONTH = 'month';
+	private const string DATE_DAY = 'day';
+	private const string DATE_MONTH = 'month';
 
-	private const NO_INTERVAL = 1;
-	private const INTERVAL = 2;
-	private const INTERVAL_BOUNDARY = 3;
-	private const INTERVAL_BOUNDARIES = 4;
+	private const int NO_INTERVAL = 1;
+	private const int INTERVAL = 2;
+	private const int INTERVAL_BOUNDARY = 3;
+	private const int INTERVAL_BOUNDARIES = 4;
 
-	private const INTERVAL_FORMAT_START = 1;
-	private const INTERVAL_FORMAT_SEPARATOR = 2;
-	private const INTERVAL_FORMAT_END = 3;
+	private const int INTERVAL_FORMAT_START = 1;
+	private const int INTERVAL_FORMAT_SEPARATOR = 2;
+	private const int INTERVAL_FORMAT_END = 3;
 
-	private const LOCAL_DATE_FORMAT = [
+	private const array LOCAL_DATE_FORMAT = [
 		'en_US' => [
 			self::DATE_DAY => [
 				self::NO_INTERVAL => 'MMMM d, y',
@@ -92,7 +92,7 @@
 		],
 	];
 
-	private const COMPARISON_FORMAT = [
+	private const array COMPARISON_FORMAT = [
 		self::DATE_DAY => [
 			self::NO_INTERVAL => 'Ymd',
 			self::INTERVAL => 'Ym',
diff --git a/site/app/EasterEgg/CrLfUrlInjections.php b/site/app/EasterEgg/CrLfUrlInjections.php
index 6d89e04d9..8aa17ad03 100644
--- a/site/app/EasterEgg/CrLfUrlInjections.php
+++ b/site/app/EasterEgg/CrLfUrlInjections.php
@@ -11,7 +11,7 @@
 readonly class CrLfUrlInjections
 {
 
-	private const COOKIE_NAME = 'crlfinjection';
+	private const string COOKIE_NAME = 'crlfinjection';
 
 
 	public function __construct(
diff --git a/site/app/EasterEgg/FourOhFourButFound.php b/site/app/EasterEgg/FourOhFourButFound.php
index 8a39692f1..5ac1ef7ea 100644
--- a/site/app/EasterEgg/FourOhFourButFound.php
+++ b/site/app/EasterEgg/FourOhFourButFound.php
@@ -10,7 +10,7 @@
 readonly class FourOhFourButFound
 {
 
-	private const TEMPLATES = [
+	private const array TEMPLATES = [
 		'/etc/passwd' => __DIR__ . '/templates/etcPasswd.html',
 	];
 
diff --git a/site/app/EasterEgg/WinterIsComing.php b/site/app/EasterEgg/WinterIsComing.php
index 724cff77b..546642b6f 100644
--- a/site/app/EasterEgg/WinterIsComing.php
+++ b/site/app/EasterEgg/WinterIsComing.php
@@ -13,13 +13,13 @@
 class WinterIsComing
 {
 
-	private const EMAILS = [
+	private const array EMAILS = [
 		'winter@example.com',
 		'sample@email.tst',
 		'arachni@email.gr',
 	];
 
-	private const HOSTS = [
+	private const array HOSTS = [
 		'burpcollaborator.net',
 		'mailrez.com',
 		'mailto.plus',
@@ -27,7 +27,7 @@ class WinterIsComing
 		'ssemarketing.net',
 	];
 
-	private const STREETS = [
+	private const array STREETS = [
 		'34 Watts road',
 	];
 
diff --git a/site/app/Feed/Exports.php b/site/app/Feed/Exports.php
index 672bd3bcc..d7a46128a 100644
--- a/site/app/Feed/Exports.php
+++ b/site/app/Feed/Exports.php
@@ -25,7 +25,7 @@
 readonly class Exports
 {
 
-	private const ITEMS = 5;
+	private const int ITEMS = 5;
 
 	private Cache $cache;
 
diff --git a/site/app/Form/TrainingDateFormFactory.php b/site/app/Form/TrainingDateFormFactory.php
index 401a2e5be..fefda620a 100644
--- a/site/app/Form/TrainingDateFormFactory.php
+++ b/site/app/Form/TrainingDateFormFactory.php
@@ -15,10 +15,10 @@
 readonly class TrainingDateFormFactory
 {
 
-	private const STANDARD = 'Standardní';
-	private const CUSTOM = 'Na zakázku';
-	private const REPLACED = 'Nahrazené';
-	private const DISCONTINUED = 'Ukončené';
+	private const string STANDARD = 'Standardní';
+	private const string CUSTOM = 'Na zakázku';
+	private const string REPLACED = 'Nahrazené';
+	private const string DISCONTINUED = 'Ukončené';
 
 
 	public function __construct(
diff --git a/site/app/Formatter/TexyPhraseHandler.php b/site/app/Formatter/TexyPhraseHandler.php
index e2a4091f0..4ab626385 100644
--- a/site/app/Formatter/TexyPhraseHandler.php
+++ b/site/app/Formatter/TexyPhraseHandler.php
@@ -23,8 +23,8 @@
 readonly class TexyPhraseHandler
 {
 
-	private const TRAINING_ACTION = 'Www:Trainings:training';
-	private const COMPANY_TRAINING_ACTION = 'Www:CompanyTrainings:training';
+	private const string TRAINING_ACTION = 'Www:Trainings:training';
+	private const string COMPANY_TRAINING_ACTION = 'Www:CompanyTrainings:training';
 
 
 	public function __construct(
diff --git a/site/app/Makefile/Makefile.php b/site/app/Makefile/Makefile.php
index e640cf07a..33b630976 100644
--- a/site/app/Makefile/Makefile.php
+++ b/site/app/Makefile/Makefile.php
@@ -11,7 +11,7 @@
 class Makefile
 {
 
-	private const PHONY_TARGET = '.PHONY';
+	private const string PHONY_TARGET = '.PHONY';
 
 	/** @var array<string, list<int>> target => lines */
 	private array $targetDefinitions = [];
diff --git a/site/app/Media/SupportedImageFileFormats.php b/site/app/Media/SupportedImageFileFormats.php
index 7e1d52f4d..0da4973e8 100644
--- a/site/app/Media/SupportedImageFileFormats.php
+++ b/site/app/Media/SupportedImageFileFormats.php
@@ -10,13 +10,13 @@
 class SupportedImageFileFormats
 {
 
-	private const SUPPORTED_MAIN_IMAGES = [
+	private const array SUPPORTED_MAIN_IMAGES = [
 		'image/gif' => 'gif',
 		'image/png' => 'png',
 		'image/jpeg' => 'jpg',
 	];
 
-	private const SUPPORTED_ALTERNATIVE_IMAGES = [
+	private const array SUPPORTED_ALTERNATIVE_IMAGES = [
 		'image/webp' => 'webp',
 	];
 
diff --git a/site/app/Media/VideoThumbnails.php b/site/app/Media/VideoThumbnails.php
index 98499837f..3d31f54de 100644
--- a/site/app/Media/VideoThumbnails.php
+++ b/site/app/Media/VideoThumbnails.php
@@ -17,8 +17,8 @@
 readonly class VideoThumbnails
 {
 
-	private const VIDEO_THUMBNAIL_WIDTH = 320;
-	private const VIDEO_THUMBNAIL_HEIGHT = 180;
+	private const int VIDEO_THUMBNAIL_WIDTH = 320;
+	private const int VIDEO_THUMBNAIL_HEIGHT = 180;
 
 
 	public function __construct(
diff --git a/site/app/Pulse/Passwords/PasswordsSorting.php b/site/app/Pulse/Passwords/PasswordsSorting.php
index eb669c3c0..5832bbba5 100644
--- a/site/app/Pulse/Passwords/PasswordsSorting.php
+++ b/site/app/Pulse/Passwords/PasswordsSorting.php
@@ -13,14 +13,14 @@
 class PasswordsSorting
 {
 
-	private const COMPANY_A_Z = 'a-z';
-	private const COMPANY_Z_A = 'z-a';
-	private const RATING_A_F = 'rating-a-f';
-	private const RATING_F_A = 'rating-f-a';
-	private const NEWEST_DISCLOSURES_FIRST = 'newest-disclosures-first';
-	private const NEWEST_DISCLOSURES_LAST = 'newest-disclosures-last';
-	private const NEWLY_ADDED_FIRST = 'newly-added-first';
-	private const NEWLY_ADDED_LAST = 'newly-added-last';
+	private const string COMPANY_A_Z = 'a-z';
+	private const string COMPANY_Z_A = 'z-a';
+	private const string RATING_A_F = 'rating-a-f';
+	private const string RATING_F_A = 'rating-f-a';
+	private const string NEWEST_DISCLOSURES_FIRST = 'newest-disclosures-first';
+	private const string NEWEST_DISCLOSURES_LAST = 'newest-disclosures-last';
+	private const string NEWLY_ADDED_FIRST = 'newly-added-first';
+	private const string NEWLY_ADDED_LAST = 'newly-added-last';
 
 	/** @var array<string, string> */
 	private array $sorting = [
diff --git a/site/app/Pulse/Passwords/Rating.php b/site/app/Pulse/Passwords/Rating.php
index 42109ce4b..c1780c1da 100644
--- a/site/app/Pulse/Passwords/Rating.php
+++ b/site/app/Pulse/Passwords/Rating.php
@@ -9,25 +9,25 @@
 class Rating
 {
 
-	private const SLOW_HASHES = [
+	private const array SLOW_HASHES = [
 		'argon2',
 		'bcrypt',
 		'pbkdf2',
 		'scrypt',
 	];
 
-	private const INSECURE = [
+	private const array INSECURE = [
 		'plaintext',
 		'encrypted',
 	];
 
-	private const VISIBLE_DISCLOSURES = [
+	private const array VISIBLE_DISCLOSURES = [
 		'docs',
 		'faq',
 		'signup-page',
 	];
 
-	private const INVISIBLE_DISCLOSURES = [
+	private const array INVISIBLE_DISCLOSURES = [
 		'blog',
 		'site-independent',
 		'facebook-independent',
@@ -42,7 +42,7 @@ class Rating
 		'comment',
 	];
 
-	private const RATING = [
+	private const array RATING = [
 		RatingGrade::A->name => 'Site uses a slow hashing function, this is disclosed "on-site", in the docs, FAQ, etc.',
 		RatingGrade::B->name => 'A slow hashing function is used but such info is "invisible", hidden in a blog post or a talk, or on social media.',
 		RatingGrade::C->name => 'Passwords hashed with an unsuitable function but at least they are salted and stretched with multiple iterations.',
@@ -51,7 +51,7 @@ class Rating
 		RatingGrade::F->name => 'Passwords stored in plaintext, in their original, readable form, or passwords encrypted instead of hashed.',
 	];
 
-	private const RECOMMENDATIONS = [
+	private const array RECOMMENDATIONS = [
 		RatingGrade::A->name => null,
 		RatingGrade::B->name => 'Publish storage and hashing info details "visibly":[link:Pulse:PasswordsStorages:Rating#on-site] (e.g. in the docs or FAQ), then let me know.',
 		RatingGrade::C->name => 'Start using "&quot;slow&quot; hashes":[link:Pulse:PasswordsStorages:Rating#slow-hashes], don\'t forget to "re-hash existing passwords":[blog:upgrading-existing-password-hashes], publish hashing info "visibly":[link:Pulse:PasswordsStorages:Rating#on-site], then let me know.',
diff --git a/site/app/Pulse/Sites.php b/site/app/Pulse/Sites.php
index f5921046b..f2592520f 100644
--- a/site/app/Pulse/Sites.php
+++ b/site/app/Pulse/Sites.php
@@ -9,7 +9,7 @@
 readonly class Sites
 {
 
-	public const ALL = 'all';
+	public const string ALL = 'all';
 
 
 	public function __construct(
diff --git a/site/app/Talks/Slides/TalkSlides.php b/site/app/Talks/Slides/TalkSlides.php
index b357e4bf7..b70b02cb4 100644
--- a/site/app/Talks/Slides/TalkSlides.php
+++ b/site/app/Talks/Slides/TalkSlides.php
@@ -27,8 +27,8 @@
 class TalkSlides
 {
 
-	private const SLIDE_MAX_WIDTH = 800;
-	private const SLIDE_MAX_HEIGHT = 450;
+	private const int SLIDE_MAX_WIDTH = 800;
+	private const int SLIDE_MAX_HEIGHT = 450;
 
 	/** @var list<string> */
 	private array $deleteFiles = [];
diff --git a/site/app/Test/TestCaseRunner.php b/site/app/Test/TestCaseRunner.php
index dd90b5f36..8940b4b39 100644
--- a/site/app/Test/TestCaseRunner.php
+++ b/site/app/Test/TestCaseRunner.php
@@ -14,8 +14,8 @@
 class TestCaseRunner
 {
 
-	private const INCLUDE_SKIPPED_ENV_VAR_NAME = 'TEST_CASE_RUNNER_INCLUDE_SKIPPED';
-	private const INCLUDE_SKIPPED_ENV_VAR_VALUE = '1';
+	private const string INCLUDE_SKIPPED_ENV_VAR_NAME = 'TEST_CASE_RUNNER_INCLUDE_SKIPPED';
+	private const string INCLUDE_SKIPPED_ENV_VAR_VALUE = '1';
 
 
 	/**
diff --git a/site/app/Tls/CertificateMonitor.php b/site/app/Tls/CertificateMonitor.php
index 38161e525..f2354937e 100644
--- a/site/app/Tls/CertificateMonitor.php
+++ b/site/app/Tls/CertificateMonitor.php
@@ -12,7 +12,7 @@
 class CertificateMonitor implements CliArgsProvider
 {
 
-	private const NO_IPV6 = '--no-ipv6';
+	private const string NO_IPV6 = '--no-ipv6';
 
 	private bool $hasErrors = false;
 
diff --git a/site/app/Training/ApplicationForm/TrainingApplicationFormSpam.php b/site/app/Training/ApplicationForm/TrainingApplicationFormSpam.php
index 1435549ad..834c461e7 100644
--- a/site/app/Training/ApplicationForm/TrainingApplicationFormSpam.php
+++ b/site/app/Training/ApplicationForm/TrainingApplicationFormSpam.php
@@ -12,7 +12,7 @@ class TrainingApplicationFormSpam
 	/**
 	 * Must be lowercase string, we need `ctype_lower()` to return true in case the field is missing.
 	 */
-	private const FIELD_MISSING_VALUE = 'missing';
+	private const string FIELD_MISSING_VALUE = 'missing';
 
 
 	public function check(stdClass $values): void
diff --git a/site/app/Training/Dates/TrainingDateFactory.php b/site/app/Training/Dates/TrainingDateFactory.php
index bc316a93f..68fae0ac8 100644
--- a/site/app/Training/Dates/TrainingDateFactory.php
+++ b/site/app/Training/Dates/TrainingDateFactory.php
@@ -13,7 +13,7 @@
 readonly class TrainingDateFactory
 {
 
-	private const LAST_FREE_SEATS_THRESHOLD_DAYS = 7;
+	private const int LAST_FREE_SEATS_THRESHOLD_DAYS = 7;
 
 
 	public function __construct(
diff --git a/site/app/Training/Dates/TrainingDates.php b/site/app/Training/Dates/TrainingDates.php
index 469f56e54..067aa5697 100644
--- a/site/app/Training/Dates/TrainingDates.php
+++ b/site/app/Training/Dates/TrainingDates.php
@@ -15,7 +15,7 @@
 class TrainingDates
 {
 
-	private const DATA_RETENTION = 30;
+	private const int DATA_RETENTION = 30;
 
 	/** @var list<TrainingDate>|null */
 	private ?array $pastWithPersonalData = null;
diff --git a/site/app/Training/Files/TrainingFilesStorage.php b/site/app/Training/Files/TrainingFilesStorage.php
index 8a7a873d7..680dfbc42 100644
--- a/site/app/Training/Files/TrainingFilesStorage.php
+++ b/site/app/Training/Files/TrainingFilesStorage.php
@@ -12,7 +12,7 @@ class TrainingFilesStorage
 	/**
 	 * Files directory, does not end with a slash.
 	 */
-	private const FILES_DIR = __DIR__ . '/../../../files/trainings';
+	private const string FILES_DIR = __DIR__ . '/../../../files/trainings';
 
 
 	/**
diff --git a/site/app/Training/Mails/TrainingMails.php b/site/app/Training/Mails/TrainingMails.php
index 4a2ecc7cf..05d26f1e0 100644
--- a/site/app/Training/Mails/TrainingMails.php
+++ b/site/app/Training/Mails/TrainingMails.php
@@ -26,7 +26,7 @@
 readonly class TrainingMails
 {
 
-	private const REMINDER_DAYS = 5;
+	private const int REMINDER_DAYS = 5;
 
 
 	public function __construct(
diff --git a/site/app/Training/Statuses/Statuses.php b/site/app/Training/Statuses/Statuses.php
index 90bf64300..c6fa6dd7e 100644
--- a/site/app/Training/Statuses/Statuses.php
+++ b/site/app/Training/Statuses/Statuses.php
@@ -14,23 +14,23 @@
 class Statuses
 {
 
-	public const STATUS_CREATED = 'CREATED'; // 1
-	public const STATUS_TENTATIVE = 'TENTATIVE'; // 2
-	public const STATUS_INVITED = 'INVITED'; // 3
-	public const STATUS_SIGNED_UP = 'SIGNED_UP'; // 4
-	public const STATUS_INVOICE_SENT = 'INVOICE_SENT'; // 5
-	public const STATUS_NOTIFIED = 'NOTIFIED'; // 6
-	public const STATUS_ATTENDED = 'ATTENDED'; // 7
-	public const STATUS_MATERIALS_SENT = 'MATERIALS_SENT'; // 8
-	public const STATUS_ACCESS_TOKEN_USED = 'ACCESS_TOKEN_USED'; // 9
-	public const STATUS_CANCELED = 'CANCELED'; // 10
-	public const STATUS_IMPORTED = 'IMPORTED'; // 13
-	public const STATUS_NON_PUBLIC_TRAINING = 'NON_PUBLIC_TRAINING'; // 14
-	public const STATUS_REMINDED = 'REMINDED'; // 15
-	public const STATUS_PAID_AFTER = 'PAID_AFTER'; // 16
-	public const STATUS_INVOICE_SENT_AFTER = 'INVOICE_SENT_AFTER'; // 17
-	public const STATUS_PRO_FORMA_INVOICE_SENT = 'PRO_FORMA_INVOICE_SENT'; // 18
-	public const STATUS_SPAM = 'SPAM'; // 19
+	public const string STATUS_CREATED = 'CREATED'; // 1
+	public const string STATUS_TENTATIVE = 'TENTATIVE'; // 2
+	public const string STATUS_INVITED = 'INVITED'; // 3
+	public const string STATUS_SIGNED_UP = 'SIGNED_UP'; // 4
+	public const string STATUS_INVOICE_SENT = 'INVOICE_SENT'; // 5
+	public const string STATUS_NOTIFIED = 'NOTIFIED'; // 6
+	public const string STATUS_ATTENDED = 'ATTENDED'; // 7
+	public const string STATUS_MATERIALS_SENT = 'MATERIALS_SENT'; // 8
+	public const string STATUS_ACCESS_TOKEN_USED = 'ACCESS_TOKEN_USED'; // 9
+	public const string STATUS_CANCELED = 'CANCELED'; // 10
+	public const string STATUS_IMPORTED = 'IMPORTED'; // 13
+	public const string STATUS_NON_PUBLIC_TRAINING = 'NON_PUBLIC_TRAINING'; // 14
+	public const string STATUS_REMINDED = 'REMINDED'; // 15
+	public const string STATUS_PAID_AFTER = 'PAID_AFTER'; // 16
+	public const string STATUS_INVOICE_SENT_AFTER = 'INVOICE_SENT_AFTER'; // 17
+	public const string STATUS_PRO_FORMA_INVOICE_SENT = 'PRO_FORMA_INVOICE_SENT'; // 18
+	public const string STATUS_SPAM = 'SPAM'; // 19
 
 	/** @var array<string, int> */
 	private array $statusIds = [];
diff --git a/site/app/UpcKeys/Technicolor.php b/site/app/UpcKeys/Technicolor.php
index c3ab6f25e..02919b5c9 100644
--- a/site/app/UpcKeys/Technicolor.php
+++ b/site/app/UpcKeys/Technicolor.php
@@ -22,7 +22,7 @@
 readonly class Technicolor implements UpcWiFiRouter
 {
 
-	private const PREFIXES = ['SAAP', 'SAPP', 'SBAP'];
+	private const array PREFIXES = ['SAAP', 'SAPP', 'SBAP'];
 
 
 	public function __construct(
diff --git a/site/app/UpcKeys/Ubee.php b/site/app/UpcKeys/Ubee.php
index cd203e4e5..2c78daca9 100644
--- a/site/app/UpcKeys/Ubee.php
+++ b/site/app/UpcKeys/Ubee.php
@@ -9,8 +9,8 @@
 readonly class Ubee implements UpcWiFiRouter
 {
 
-	private const OUI_UBEE = '647c34';
-	private const PREFIX = 'UAAP';
+	private const string OUI_UBEE = '647c34';
+	private const string PREFIX = 'UAAP';
 
 
 	public function __construct(
diff --git a/site/app/UpcKeys/UpcKeys.php b/site/app/UpcKeys/UpcKeys.php
index 66ba93a92..95ad9fe32 100644
--- a/site/app/UpcKeys/UpcKeys.php
+++ b/site/app/UpcKeys/UpcKeys.php
@@ -9,9 +9,9 @@
 class UpcKeys
 {
 
-	private const SSID_VALID_PATTERN = '([Uu][Pp][Cc])[0-9]{7}';
+	private const string SSID_VALID_PATTERN = '([Uu][Pp][Cc])[0-9]{7}';
 
-	private const SSID_PLACEHOLDER = 'UPC1234567';
+	private const string SSID_PLACEHOLDER = 'UPC1234567';
 
 	/** @var array<class-string<UpcWiFiRouter>, UpcWiFiRouter> */
 	private array $routers = [];
diff --git a/site/app/User/Manager.php b/site/app/User/Manager.php
index e9d243eff..8a63ffcb9 100644
--- a/site/app/User/Manager.php
+++ b/site/app/User/Manager.php
@@ -33,11 +33,11 @@
 readonly class Manager implements Authenticator
 {
 
-	private const AUTH_SELECTOR_TOKEN_SEPARATOR = ':';
+	private const string AUTH_SELECTOR_TOKEN_SEPARATOR = ':';
 
-	private const TOKEN_PERMANENT_LOGIN = 1;
+	private const int TOKEN_PERMANENT_LOGIN = 1;
 
-	private const TOKEN_RETURNING_USER = 2;
+	private const int TOKEN_RETURNING_USER = 2;
 
 	private string $authCookiesPath;
 
diff --git a/site/app/Utils/Base64.php b/site/app/Utils/Base64.php
index b6ae8a80f..9eed4fe6c 100644
--- a/site/app/Utils/Base64.php
+++ b/site/app/Utils/Base64.php
@@ -6,8 +6,8 @@
 class Base64
 {
 
-	private const LAST_TWO_STANDARD = ['+', '/'];
-	private const LAST_TWO_URL_VARIANT = ['-', '_'];
+	private const array LAST_TWO_STANDARD = ['+', '/'];
+	private const array LAST_TWO_URL_VARIANT = ['-', '_'];
 
 
 	public static function urlEncode(string $string): string
diff --git a/site/composer.lock b/site/composer.lock
index f6bee97b5..3019b9e04 100644
--- a/site/composer.lock
+++ b/site/composer.lock
@@ -4415,22 +4415,22 @@
         },
         {
             "name": "spaze/phpcs-phar",
-            "version": "3.8.1",
+            "version": "3.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/spaze/phpcs-phar.git",
-                "reference": "5ee407d53308a5b898c85d0ea85e4509303dff01"
+                "reference": "07c678e294c2cf5843da1d94f88669274f3a3f0f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/spaze/phpcs-phar/zipball/5ee407d53308a5b898c85d0ea85e4509303dff01",
-                "reference": "5ee407d53308a5b898c85d0ea85e4509303dff01",
+                "url": "https://api.github.com/repos/spaze/phpcs-phar/zipball/07c678e294c2cf5843da1d94f88669274f3a3f0f",
+                "reference": "07c678e294c2cf5843da1d94f88669274f3a3f0f",
                 "shasum": ""
             },
             "replace": {
                 "dealerdirect/phpcodesniffer-composer-installer": "*",
-                "phpcsstandards/php_codesniffer": "3.8.1",
-                "squizlabs/php_codesniffer": "3.8.1"
+                "phpcsstandards/php_codesniffer": "3.9.0",
+                "squizlabs/php_codesniffer": "3.9.0"
             },
             "bin": [
                 "phpcbf",
@@ -4454,9 +4454,9 @@
             ],
             "support": {
                 "issues": "https://github.com/spaze/phpcs-phar/issues",
-                "source": "https://github.com/spaze/phpcs-phar/tree/3.8.1"
+                "source": "https://github.com/spaze/phpcs-phar/tree/3.9.0"
             },
-            "time": "2024-01-31T02:17:10+00:00"
+            "time": "2024-02-16T16:22:48+00:00"
         },
         {
             "name": "spaze/phpstan-disallowed-calls",
diff --git a/site/tests/Application/ThemeTest.phpt b/site/tests/Application/ThemeTest.phpt
index 585093986..a20881b35 100644
--- a/site/tests/Application/ThemeTest.phpt
+++ b/site/tests/Application/ThemeTest.phpt
@@ -15,7 +15,7 @@ require __DIR__ . '/../bootstrap.php';
 class ThemeTest extends TestCase
 {
 
-	private const COOKIE = 'future';
+	private const string COOKIE = 'future';
 
 
 	public function __construct(
diff --git a/site/tests/Formatter/TexyFormatterTest.phpt b/site/tests/Formatter/TexyFormatterTest.phpt
index 80c65616a..4f1ae11fa 100644
--- a/site/tests/Formatter/TexyFormatterTest.phpt
+++ b/site/tests/Formatter/TexyFormatterTest.phpt
@@ -24,7 +24,7 @@ require __DIR__ . '/../bootstrap.php';
 class TexyFormatterTest extends TestCase
 {
 
-	private const TRAINING_ACTION = 'bezpecnost-php-aplikaci';
+	private const string TRAINING_ACTION = 'bezpecnost-php-aplikaci';
 
 	private string $expectedFormatted;
 
diff --git a/site/tests/Formatter/TexyPhraseHandlerTest.phpt b/site/tests/Formatter/TexyPhraseHandlerTest.phpt
index c52f36a52..1120fcfb9 100644
--- a/site/tests/Formatter/TexyPhraseHandlerTest.phpt
+++ b/site/tests/Formatter/TexyPhraseHandlerTest.phpt
@@ -23,7 +23,7 @@ require __DIR__ . '/../bootstrap.php';
 class TexyPhraseHandlerTest extends TestCase
 {
 
-	private const EN_LOCALE = 'en_US';
+	private const string EN_LOCALE = 'en_US';
 
 	private Texy $texy;
 	private string $defaultLocale;
diff --git a/site/tests/Pulse/Passwords/Storage/StorageAlgorithmTest.phpt b/site/tests/Pulse/Passwords/Storage/StorageAlgorithmTest.phpt
index ae6d23e59..b7b8ab23d 100644
--- a/site/tests/Pulse/Passwords/Storage/StorageAlgorithmTest.phpt
+++ b/site/tests/Pulse/Passwords/Storage/StorageAlgorithmTest.phpt
@@ -15,7 +15,7 @@ require __DIR__ . '/../../../bootstrap.php';
 class StorageAlgorithmTest extends TestCase
 {
 
-	private const ALGO = 'bcrypt';
+	private const string ALGO = 'bcrypt';
 
 
 	/**
diff --git a/site/tests/Training/ApplicationForm/TrainingApplicationFormDataLoggerTest.phpt b/site/tests/Training/ApplicationForm/TrainingApplicationFormDataLoggerTest.phpt
index 04eda6533..2d2cd4c58 100644
--- a/site/tests/Training/ApplicationForm/TrainingApplicationFormDataLoggerTest.phpt
+++ b/site/tests/Training/ApplicationForm/TrainingApplicationFormDataLoggerTest.phpt
@@ -25,8 +25,8 @@ require __DIR__ . '/../../bootstrap.php';
 class TrainingApplicationFormDataLoggerTest extends TestCase
 {
 
-	private const APPLICATION_ID = 10;
-	private const DATE_ID = 20;
+	private const int APPLICATION_ID = 10;
+	private const int DATE_ID = 20;
 
 
 	public function __construct(
diff --git a/site/tests/Training/ApplicationForm/TrainingApplicationFormSuccessTest.phpt b/site/tests/Training/ApplicationForm/TrainingApplicationFormSuccessTest.phpt
index 11ec31d74..a8cb107a4 100644
--- a/site/tests/Training/ApplicationForm/TrainingApplicationFormSuccessTest.phpt
+++ b/site/tests/Training/ApplicationForm/TrainingApplicationFormSuccessTest.phpt
@@ -34,19 +34,19 @@ require __DIR__ . '/../../bootstrap.php';
 class TrainingApplicationFormSuccessTest extends TestCase
 {
 
-	private const DATE_ID = 1337;
-	private const APPLICATION_ID = 808;
-	private const TRAINING_ACTION = 'training-action';
-	private const NAME = 'Foo';
-	private const EMAIL = 'foo@example.com';
-	private const COMPANY = 'A-Team';
-	private const STREET = '21 Jump';
-	private const CITY = 'York';
-	private const ZIP = '13371';
-	private const COUNTRY = 'cz';
-	private const COMPANY_ID = '123';
-	private const COMPANY_TAX_ID = 'CZ123';
-	private const NOTE = 'book';
+	private const int DATE_ID = 1337;
+	private const int APPLICATION_ID = 808;
+	private const string TRAINING_ACTION = 'training-action';
+	private const string NAME = 'Foo';
+	private const string EMAIL = 'foo@example.com';
+	private const string COMPANY = 'A-Team';
+	private const string STREET = '21 Jump';
+	private const string CITY = 'York';
+	private const string ZIP = '13371';
+	private const string COUNTRY = 'cz';
+	private const string COMPANY_ID = '123';
+	private const string COMPANY_TAX_ID = 'CZ123';
+	private const string NOTE = 'book';
 
 
 	private ?string $onSuccessAction = null;
diff --git a/site/tests/Training/Applications/TrainingApplicationSessionSectionTest.phpt b/site/tests/Training/Applications/TrainingApplicationSessionSectionTest.phpt
index 09c002633..e3663109b 100644
--- a/site/tests/Training/Applications/TrainingApplicationSessionSectionTest.phpt
+++ b/site/tests/Training/Applications/TrainingApplicationSessionSectionTest.phpt
@@ -26,18 +26,18 @@ require __DIR__ . '/../../bootstrap.php';
 class TrainingApplicationSessionSectionTest extends TestCase
 {
 
-	private const APPLICATION_ID = 303;
-	private const DATE_ID = 909;
-	private const NAME = 'Foo';
-	private const EMAIL = 'foo@example.example';
-	private const COMPANY = 'Teh Company';
-	private const STREET = 'Street';
-	private const CITY = 'City';
-	private const ZIP = '303808';
-	private const COUNTRY = 'Country';
-	private const COMPANY_ID = '31337';
-	private const COMPANY_TAX_ID = 'CZ31337';
-	private const NOTE = 'Note';
+	private const int APPLICATION_ID = 303;
+	private const int DATE_ID = 909;
+	private const string NAME = 'Foo';
+	private const string EMAIL = 'foo@example.example';
+	private const string COMPANY = 'Teh Company';
+	private const string STREET = 'Street';
+	private const string CITY = 'City';
+	private const string ZIP = '303808';
+	private const string COUNTRY = 'Country';
+	private const string COMPANY_ID = '31337';
+	private const string COMPANY_TAX_ID = 'CZ31337';
+	private const string NOTE = 'Note';
 
 	private TrainingApplicationSessionSection $trainingApplicationSessionSection;
 	private SessionSection $sessionSection;
diff --git a/site/tests/Training/Applications/TrainingApplicationStorageTest.phpt b/site/tests/Training/Applications/TrainingApplicationStorageTest.phpt
index 4ad8cd816..ba0644c4b 100644
--- a/site/tests/Training/Applications/TrainingApplicationStorageTest.phpt
+++ b/site/tests/Training/Applications/TrainingApplicationStorageTest.phpt
@@ -22,11 +22,11 @@ require __DIR__ . '/../../bootstrap.php';
 class TrainingApplicationStorageTest extends TestCase
 {
 
-	private const STATUS_CREATED = 1;
-	private const STATUS_TENTATIVE = 2;
-	private const STATUS_SIGNED_UP = 4;
-	private const SOURCE_ID = 303;
-	private const INSERT_ID = 1337;
+	private const int STATUS_CREATED = 1;
+	private const int STATUS_TENTATIVE = 2;
+	private const int STATUS_SIGNED_UP = 4;
+	private const int SOURCE_ID = 303;
+	private const int INSERT_ID = 1337;
 
 
 	public function __construct(
diff --git a/site/tests/Training/Files/TrainingFilesDownloadTest.phpt b/site/tests/Training/Files/TrainingFilesDownloadTest.phpt
index d615b9fa0..cf7cf80a9 100644
--- a/site/tests/Training/Files/TrainingFilesDownloadTest.phpt
+++ b/site/tests/Training/Files/TrainingFilesDownloadTest.phpt
@@ -24,8 +24,8 @@ require __DIR__ . '/../../bootstrap.php';
 class TrainingFilesDownloadTest extends TestCase
 {
 
-	private const APPLICATION_ID = 303;
-	private const TOKEN = 's0m370k3n';
+	private const int APPLICATION_ID = 303;
+	private const string TOKEN = 's0m370k3n';
 
 	private readonly UiPresenterMock $presenter;
 
diff --git a/site/tests/Training/Files/TrainingFilesSessionSectionTest.phpt b/site/tests/Training/Files/TrainingFilesSessionSectionTest.phpt
index 3880b9239..f5037c53e 100644
--- a/site/tests/Training/Files/TrainingFilesSessionSectionTest.phpt
+++ b/site/tests/Training/Files/TrainingFilesSessionSectionTest.phpt
@@ -22,10 +22,10 @@ require __DIR__ . '/../../bootstrap.php';
 class TrainingFilesSessionSectionTest extends TestCase
 {
 
-	private const APPLICATION_ID = 303;
-	private const APPLICATION_ID_KEY = 'applicationId';
-	private const TOKEN = 'AToken';
-	private const TOKEN_KEY = 'token';
+	private const int APPLICATION_ID = 303;
+	private const string APPLICATION_ID_KEY = 'applicationId';
+	private const string TOKEN = 'AToken';
+	private const string TOKEN_KEY = 'token';
 
 	private TrainingFilesSessionSection $trainingFilesSessionSection;
 	private SessionSection $sessionSection;
diff --git a/site/tests/Utils/Base64Test.phpt b/site/tests/Utils/Base64Test.phpt
index b813815f8..d1c2d8706 100644
--- a/site/tests/Utils/Base64Test.phpt
+++ b/site/tests/Utils/Base64Test.phpt
@@ -13,8 +13,8 @@ require __DIR__ . '/../bootstrap.php';
 class Base64Test extends TestCase
 {
 
-	private const THIS_STRING_WILL_HAVE_A_PLUS_AND_A_SLASH_WHEN_BASE64_ENCODED = "\xFA\xFA\xFF\xF0";
-	private const THAT_STRING_WILL_BE_ENCODED_TO_BASE64URL_LIKE_THIS = '-vr_8A';
+	private const string THIS_STRING_WILL_HAVE_A_PLUS_AND_A_SLASH_WHEN_BASE64_ENCODED = "\xFA\xFA\xFF\xF0";
+	private const string THAT_STRING_WILL_BE_ENCODED_TO_BASE64URL_LIKE_THIS = '-vr_8A';
 
 
 	public function testUrlEncode(): void
diff --git a/site/vendor/composer/installed.json b/site/vendor/composer/installed.json
index ce5276f8e..900736b0e 100644
--- a/site/vendor/composer/installed.json
+++ b/site/vendor/composer/installed.json
@@ -3526,25 +3526,25 @@
         },
         {
             "name": "spaze/phpcs-phar",
-            "version": "3.8.1",
-            "version_normalized": "3.8.1.0",
+            "version": "3.9.0",
+            "version_normalized": "3.9.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/spaze/phpcs-phar.git",
-                "reference": "5ee407d53308a5b898c85d0ea85e4509303dff01"
+                "reference": "07c678e294c2cf5843da1d94f88669274f3a3f0f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/spaze/phpcs-phar/zipball/5ee407d53308a5b898c85d0ea85e4509303dff01",
-                "reference": "5ee407d53308a5b898c85d0ea85e4509303dff01",
+                "url": "https://api.github.com/repos/spaze/phpcs-phar/zipball/07c678e294c2cf5843da1d94f88669274f3a3f0f",
+                "reference": "07c678e294c2cf5843da1d94f88669274f3a3f0f",
                 "shasum": ""
             },
             "replace": {
                 "dealerdirect/phpcodesniffer-composer-installer": "*",
-                "phpcsstandards/php_codesniffer": "3.8.1",
-                "squizlabs/php_codesniffer": "3.8.1"
+                "phpcsstandards/php_codesniffer": "3.9.0",
+                "squizlabs/php_codesniffer": "3.9.0"
             },
-            "time": "2024-01-31T02:17:10+00:00",
+            "time": "2024-02-16T16:22:48+00:00",
             "bin": [
                 "phpcbf",
                 "phpcs"
@@ -3568,7 +3568,7 @@
             ],
             "support": {
                 "issues": "https://github.com/spaze/phpcs-phar/issues",
-                "source": "https://github.com/spaze/phpcs-phar/tree/3.8.1"
+                "source": "https://github.com/spaze/phpcs-phar/tree/3.9.0"
             },
             "install-path": "../spaze/phpcs-phar"
         },
diff --git a/site/vendor/composer/installed.php b/site/vendor/composer/installed.php
index 0638ccfbb..1765ee4da 100644
--- a/site/vendor/composer/installed.php
+++ b/site/vendor/composer/installed.php
@@ -3,7 +3,7 @@
         'name' => 'spaze/michalspacek.cz',
         'pretty_version' => 'dev-main',
         'version' => 'dev-main',
-        'reference' => '81b7cc2fe0e7f153924e33baa26ade2316a28773',
+        'reference' => '42ab88f837070774ea34eeab994ea5090654365b',
         'type' => 'project',
         'install_path' => __DIR__ . '/../../',
         'aliases' => array(),
@@ -310,7 +310,7 @@
         'phpcsstandards/php_codesniffer' => array(
             'dev_requirement' => true,
             'replaced' => array(
-                0 => '3.8.1',
+                0 => '3.9.0',
             ),
         ),
         'phpstan/phpdoc-parser' => array(
@@ -456,7 +456,7 @@
         'spaze/michalspacek.cz' => array(
             'pretty_version' => 'dev-main',
             'version' => 'dev-main',
-            'reference' => '81b7cc2fe0e7f153924e33baa26ade2316a28773',
+            'reference' => '42ab88f837070774ea34eeab994ea5090654365b',
             'type' => 'project',
             'install_path' => __DIR__ . '/../../',
             'aliases' => array(),
@@ -481,9 +481,9 @@
             'dev_requirement' => false,
         ),
         'spaze/phpcs-phar' => array(
-            'pretty_version' => '3.8.1',
-            'version' => '3.8.1.0',
-            'reference' => '5ee407d53308a5b898c85d0ea85e4509303dff01',
+            'pretty_version' => '3.9.0',
+            'version' => '3.9.0.0',
+            'reference' => '07c678e294c2cf5843da1d94f88669274f3a3f0f',
             'type' => 'library',
             'install_path' => __DIR__ . '/../spaze/phpcs-phar',
             'aliases' => array(),
@@ -537,7 +537,7 @@
         'squizlabs/php_codesniffer' => array(
             'dev_requirement' => true,
             'replaced' => array(
-                0 => '3.8.1',
+                0 => '3.9.0',
             ),
         ),
         'symfony/cache' => array(
diff --git a/site/vendor/spaze/phpcs-phar/composer.json b/site/vendor/spaze/phpcs-phar/composer.json
index 215ed78bf..dad186167 100644
--- a/site/vendor/spaze/phpcs-phar/composer.json
+++ b/site/vendor/spaze/phpcs-phar/composer.json
@@ -14,8 +14,8 @@
 	],
 	"replace": {
 		"dealerdirect/phpcodesniffer-composer-installer": "*",
-		"phpcsstandards/php_codesniffer": "3.8.1",
-		"squizlabs/php_codesniffer": "3.8.1"
+		"phpcsstandards/php_codesniffer": "3.9.0",
+		"squizlabs/php_codesniffer": "3.9.0"
 	},
 	"bin": [
 		"phpcbf",
diff --git a/site/vendor/spaze/phpcs-phar/phpcs.phar b/site/vendor/spaze/phpcs-phar/phpcs.phar
index e380913c8..11cb40ee8 100644
Binary files a/site/vendor/spaze/phpcs-phar/phpcs.phar and b/site/vendor/spaze/phpcs-phar/phpcs.phar differ
diff --git a/site/vendor/spaze/phpcs-phar/phpcs.phar.asc b/site/vendor/spaze/phpcs-phar/phpcs.phar.asc
index 96748ffde..4d2dd1da5 100644
Binary files a/site/vendor/spaze/phpcs-phar/phpcs.phar.asc and b/site/vendor/spaze/phpcs-phar/phpcs.phar.asc differ