Require PHP 7.4+ (#5720)

* Require PHP 7.4+
https://github.com/FreshRSS/FreshRSS/discussions/5474

* Update Docker oldest
Alpine 3.13 with PHP 7.4.26

* Add missing packets to Docker oldest

* Update to typed properties
https://php.net/migration74.new-features#migration74.new-features.core.typed-properties

* More types

26 files changed, 264 insertions, 476 deletions

diff --git a/app/Controllers/entryController.php b/app/Controllers/entryController.php
index 95ac9ee39..820075f27 100644
--- a/app/Controllers/entryController.php
+++ b/app/Controllers/entryController.php
@@ -7,9 +7,8 @@ class FreshRSS_entry_Controller extends FreshRSS_ActionController {
 
 	/**
 	 * JavaScript request or not.
-	 * @var bool
 	 */
-	private $ajax = false;
+	private bool $ajax = false;
 
 	/**
 	 * This action is called before every other action in that class. It is
diff --git a/app/Controllers/importExportController.php b/app/Controllers/importExportController.php
index dc11a2a46..8f611bc78 100644
--- a/app/Controllers/importExportController.php
+++ b/app/Controllers/importExportController.php
@@ -5,11 +5,9 @@
  */
 class FreshRSS_importExport_Controller extends FreshRSS_ActionController {
 
-	/** @var FreshRSS_EntryDAO */
-	private $entryDAO;
+	private FreshRSS_EntryDAO $entryDAO;
 
-	/** @var FreshRSS_FeedDAO */
-	private $feedDAO;
+	private FreshRSS_FeedDAO $feedDAO;
 
 	/**
 	 * This action is called before every other action in that class. It is
diff --git a/app/Controllers/tagController.php b/app/Controllers/tagController.php
index 4536e3f13..1a7c81841 100644
--- a/app/Controllers/tagController.php
+++ b/app/Controllers/tagController.php
@@ -7,9 +7,8 @@ class FreshRSS_tag_Controller extends FreshRSS_ActionController {
 
 	/**
 	 * JavaScript request or not.
-	 * @var bool|mixed
 	 */
-	private $ajax = false;
+	private bool $ajax = false;
 
 	/**
 	 * This action is called before every other action in that class. It is
diff --git a/app/Exceptions/AlreadySubscribedException.php b/app/Exceptions/AlreadySubscribedException.php
index c2b11d3a0..410784451 100644
--- a/app/Exceptions/AlreadySubscribedException.php
+++ b/app/Exceptions/AlreadySubscribedException.php
@@ -2,8 +2,7 @@
 
 class FreshRSS_AlreadySubscribed_Exception extends Exception {
 
-	/** @var string */
-	private $feedName = '';
+	private string $feedName = '';
 
 	public function __construct(string $url, string $feedName) {
 		parent::__construct('Already subscribed! ' . $url, 2135);
diff --git a/app/Exceptions/FeedNotAddedException.php b/app/Exceptions/FeedNotAddedException.php
index b10e93f05..4676c8eb3 100644
--- a/app/Exceptions/FeedNotAddedException.php
+++ b/app/Exceptions/FeedNotAddedException.php
@@ -2,8 +2,7 @@
 
 class FreshRSS_FeedNotAdded_Exception extends Exception {
 
-	/** @var string */
-	private $url = '';
+	private string $url = '';
 
 	public function __construct(string $url) {
 		parent::__construct('Feed not added! ' . $url, 2147);
diff --git a/app/Exceptions/ZipException.php b/app/Exceptions/ZipException.php
index ecf546533..d02cc1aea 100644
--- a/app/Exceptions/ZipException.php
+++ b/app/Exceptions/ZipException.php
@@ -2,8 +2,7 @@
 
 class FreshRSS_Zip_Exception extends Exception {
 
-	/** @var int */
-	private $zipErrorCode = 0;
+	private int $zipErrorCode = 0;
 
 	public function __construct(int $zipErrorCode) {
 		parent::__construct('ZIP error!', 2141);
diff --git a/app/Models/Auth.php b/app/Models/Auth.php
index f3c8b52f9..205b428a2 100644
--- a/app/Models/Auth.php
+++ b/app/Models/Auth.php
@@ -9,8 +9,7 @@ class FreshRSS_Auth {
 	 */
 	public const DEFAULT_COOKIE_DURATION = 7776000;
 
-	/** @var bool */
-	private static $login_ok = false;
+	private static bool $login_ok = false;
 
 	/**
 	 * This method initializes authentication system.
diff --git a/app/Models/BooleanSearch.php b/app/Models/BooleanSearch.php
index 03fec4cb7..d8c47c878 100644
--- a/app/Models/BooleanSearch.php
+++ b/app/Models/BooleanSearch.php
@@ -5,16 +5,14 @@
  */
 class FreshRSS_BooleanSearch {
 
-	/** @var string */
-	private $raw_input = '';
+	private string $raw_input = '';
 	/** @var array<FreshRSS_BooleanSearch|FreshRSS_Search> */
-	private $searches = [];
+	private array $searches = [];
 
 	/**
 	 * @phpstan-var 'AND'|'OR'|'AND NOT'
-	 * @var string
 	 */
-	private $operator;
+	private string $operator;
 
 	/** @param 'AND'|'OR'|'AND NOT' $operator */
 	public function __construct(string $input, int $level = 0, string $operator = 'AND') {
diff --git a/app/Models/Category.php b/app/Models/Category.php
index 1adf81f92..3bb64df8b 100644
--- a/app/Models/Category.php
+++ b/app/Models/Category.php
@@ -12,26 +12,19 @@ class FreshRSS_Category extends Minz_Model {
 	 */
 	public const KIND_DYNAMIC_OPML = 2;
 
-	/** @var int */
-	private $id = 0;
-	/** @var int */
-	private $kind = 0;
-	/** @var string */
-	private $name;
-	/** @var int */
-	private $nbFeeds = -1;
-	/** @var int */
-	private $nbNotRead = -1;
+	private int $id = 0;
+	private int $kind = 0;
+	private string $name;
+	private int $nbFeeds = -1;
+	private int $nbNotRead = -1;
 	/** @var array<FreshRSS_Feed>|null */
-	private $feeds;
+	private ?array $feeds = null;
 	/** @var bool|int */
 	private $hasFeedsWithError = false;
 	/** @var array<string,mixed> */
-	private $attributes = [];
-	/** @var int */
-	private $lastUpdate = 0;
-	/** @var bool */
-	private $error = false;
+	private array $attributes = [];
+	private int $lastUpdate = 0;
+	private bool $error = false;
 
 	/**
 	 * @param array<FreshRSS_Feed>|null $feeds
diff --git a/app/Models/Context.php b/app/Models/Context.php
index 086d860dd..c1fa96ae7 100644
--- a/app/Models/Context.php
+++ b/app/Models/Context.php
@@ -6,50 +6,31 @@
  */
 final class FreshRSS_Context {
 
-	/**
-	 * @var FreshRSS_UserConfiguration|null
-	 */
-	public static $user_conf;
-
-	/**
-	 * @var FreshRSS_SystemConfiguration|null
-	 */
-	public static $system_conf;
+	public static ?FreshRSS_UserConfiguration $user_conf = null;
+	public static ?FreshRSS_SystemConfiguration $system_conf = null;
 	/**
 	 * @var array<int,FreshRSS_Category>
 	 */
-	public static $categories = [];
+	public static array $categories = [];
 	/**
 	 * @var array<int,FreshRSS_Tag>
 	 */
-	public static $tags = [];
-	/**
-	 * @var string
-	 */
-	public static $name = '';
-	/**
-	 * @var string
-	 */
-	public static $description = '';
-	/**
-	 * @var int
-	 */
-	public static $total_unread = 0;
+	public static array $tags = [];
+	public static string $name = '';
+	public static string $description = '';
+	public static int $total_unread = 0;
 
 	/** @var array{'all':int,'read':int,'unread':int} */
-	public static $total_starred = [
+	public static array $total_starred = [
 		'all' => 0,
 		'read' => 0,
 		'unread' => 0,
 	];
 
-	/**
-	 * @var int
-	 */
-	public static $get_unread = 0;
+	public static int $get_unread = 0;
 
 	/** @var array{'all':bool,'starred':bool,'feed':int|false,'category':int|false,'tag':int|false,'tags':bool} */
-	public static $current_get = [
+	public static array $current_get = [
 		'all' => false,
 		'starred' => false,
 		'feed' => false,
@@ -58,45 +39,19 @@ final class FreshRSS_Context {
 		'tags' => false,
 	];
 
-	/**
-	 * @var string
-	 */
-	public static $next_get = 'a';
-	/**
-	 * @var int
-	 */
-	public static $state = 0;
+	public static string $next_get = 'a';
+	public static int $state = 0;
 	/**
 	 * @phpstan-var 'ASC'|'DESC'
-	 * @var string
-	 */
-	public static $order = 'DESC';
-	/**
-	 * @var int
-	 */
-	public static $number = 0;
-	/** @var FreshRSS_BooleanSearch */
-	public static $search;
-	/**
-	 * @var string
-	 */
-	public static $first_id = '';
-	/**
-	 * @var string
-	 */
-	public static $next_id = '';
-	/**
-	 * @var string
-	 */
-	public static $id_max = '';
-	/**
-	 * @var int
-	 */
-	public static $sinceHours = 0;
-	/**
-	 * @var bool
 	 */
-	public static $isCli = false;
+	public static string $order = 'DESC';
+	public static int $number = 0;
+	public static FreshRSS_BooleanSearch $search;
+	public static string $first_id = '';
+	public static string $next_id = '';
+	public static string $id_max = '';
+	public static int $sinceHours = 0;
+	public static bool $isCli = false;
 
 	/**
 	 * Initialize the context for the global system.
diff --git a/app/Models/Entry.php b/app/Models/Entry.php
index 31aaf67a0..e3e61fb00 100644
--- a/app/Models/Entry.php
+++ b/app/Models/Entry.php
@@ -7,38 +7,26 @@ class FreshRSS_Entry extends Minz_Model {
 	public const STATE_FAVORITE = 4;
 	public const STATE_NOT_FAVORITE = 8;
 
-	/** @var string */
-	private $id = '0';
-	/** @var string */
-	private $guid;
-	/** @var string */
-	private $title;
+	private string $id = '0';
+	private string $guid;
+	private string $title;
 	/** @var array<string> */
-	private $authors;
-	/** @var string */
-	private $content;
-	/** @var string */
-	private $link;
-	/** @var int */
-	private $date;
-	/** @var int */
-	private $lastSeen = 0;
-	/** @var string In microseconds */
-	private $date_added = '0';
-	/** @var string */
-	private $hash = '';
-	/** @var bool|null */
-	private $is_read;
-	/** @var bool|null */
-	private $is_favorite;
-	/** @var int */
-	private $feedId;
-	/** @var FreshRSS_Feed|null */
-	private $feed;
+	private array $authors;
+	private string $content;
+	private string $link;
+	private int $date;
+	private int $lastSeen = 0;
+	/** In microseconds */
+	private string $date_added = '0';
+	private string $hash = '';
+	private ?bool $is_read;
+	private ?bool $is_favorite;
+	private int $feedId;
+	private ?FreshRSS_Feed $feed;
 	/** @var array<string> */
-	private $tags = [];
+	private array $tags = [];
 	/** @var array<string,mixed> */
-	private $attributes = [];
+	private array $attributes = [];
 
 	/**
 	 * @param int|string $pubdate
diff --git a/app/Models/EntryDAO.php b/app/Models/EntryDAO.php
index f57fa17d7..b9f8d57cb 100644
--- a/app/Models/EntryDAO.php
+++ b/app/Models/EntryDAO.php
@@ -190,8 +190,7 @@ SQL;
 		return $result;
 	}
 
-	/** @var PDOStatement|null */
-	private $updateEntryPrepared = null;
+	private ?PDOStatement $updateEntryPrepared = null;
 
 	/** @param array{'id':string,'guid':string,'title':string,'author':string,'content':string,'link':string,'date':int,'lastSeen':int,'hash':string,
 	 *		'is_read':bool|int|null,'is_favorite':bool|int|null,'id_feed':int,'tags':string,'attributes':array<string,mixed>} $valuesTmp */
diff --git a/app/Models/Feed.php b/app/Models/Feed.php
index e295804ae..64aebccfa 100644
--- a/app/Models/Feed.php
+++ b/app/Models/Feed.php
@@ -37,54 +37,32 @@ class FreshRSS_Feed extends Minz_Model {
 	public const ARCHIVING_RETENTION_COUNT_LIMIT = 10000;
 	public const ARCHIVING_RETENTION_PERIOD = 'P3M';
 
-	/** @var int */
-	private $id = 0;
-	/** @var string */
-	private $url = '';
-	/** @var int */
-	private $kind = 0;
-	/** @var int */
-	private $categoryId = 1;
-	/** @var FreshRSS_Category|null */
-	private $category;
-	/** @var int */
-	private $nbEntries = -1;
-	/** @var int */
-	private $nbNotRead = -1;
-	/** @var int */
-	private $nbPendingNotRead = 0;
-	/** @var string */
-	private $name = '';
-	/** @var string */
-	private $website = '';
-	/** @var string */
-	private $description = '';
-	/** @var int */
-	private $lastUpdate = 0;
-	/** @var int */
-	private $priority = self::PRIORITY_MAIN_STREAM;
-	/** @var string */
-	private $pathEntries = '';
-	/** @var string */
-	private $httpAuth = '';
-	/** @var bool */
-	private $error = false;
-	/** @var int */
-	private $ttl = self::TTL_DEFAULT;
+	private int $id = 0;
+	private string $url = '';
+	private int $kind = 0;
+	private int $categoryId = 1;
+	private ?FreshRSS_Category $category;
+	private int $nbEntries = -1;
+	private int $nbNotRead = -1;
+	private int $nbPendingNotRead = 0;
+	private string $name = '';
+	private string $website = '';
+	private string $description = '';
+	private int $lastUpdate = 0;
+	private int $priority = self::PRIORITY_MAIN_STREAM;
+	private string $pathEntries = '';
+	private string $httpAuth = '';
+	private bool $error = false;
+	private int $ttl = self::TTL_DEFAULT;
 	/** @var array<string,mixed> */
-	private $attributes = [];
-	/** @var bool */
-	private $mute = false;
-	/** @var string */
-	private $hash = '';
-	/** @var string */
-	private $lockPath = '';
-	/** @var string */
-	private $hubUrl = '';
-	/** @var string */
-	private $selfUrl = '';
+	private array $attributes = [];
+	private bool $mute = false;
+	private string $hash = '';
+	private string $lockPath = '';
+	private string $hubUrl = '';
+	private string $selfUrl = '';
 	/** @var array<FreshRSS_FilterAction> $filterActions */
-	private $filterActions = null;
+	private array $filterActions = [];
 
 	public function __construct(string $url, bool $validate = true) {
 		if ($validate) {
diff --git a/app/Models/FilterAction.php b/app/Models/FilterAction.php
index e94456086..bd8b12a7a 100644
--- a/app/Models/FilterAction.php
+++ b/app/Models/FilterAction.php
@@ -2,10 +2,9 @@
 
 class FreshRSS_FilterAction {
 
-	/** @var FreshRSS_BooleanSearch */
-	private $booleanSearch = null;
+	private FreshRSS_BooleanSearch $booleanSearch;
 	/** @var array<string>|null */
-	private $actions = null;
+	private ?array $actions = null;
 
 	/** @param array<string> $actions */
 	private function __construct(FreshRSS_BooleanSearch $booleanSearch, array $actions) {
diff --git a/app/Models/Log.php b/app/Models/Log.php
index 96714d1c7..c3f4bb244 100644
--- a/app/Models/Log.php
+++ b/app/Models/Log.php
@@ -3,12 +3,10 @@
 declare(strict_types=1);
 
 class FreshRSS_Log extends Minz_Model {
-	/** @var string */
-	private $date;
-	/** @var string */
-	private $level;
-	/** @var string */
-	private $information;
+
+	private string $date;
+	private string $level;
+	private string $information;
 
 	public function date(): string {
 		return $this->date;
diff --git a/app/Models/ReadingMode.php b/app/Models/ReadingMode.php
index c0fa95b31..51ff26fd5 100644
--- a/app/Models/ReadingMode.php
+++ b/app/Models/ReadingMode.php
@@ -5,24 +5,12 @@
  */
 class FreshRSS_ReadingMode {
 
-	/**
-	 * @var string
-	 */
-	protected $id;
-	/**
-	 * @var string
-	 */
-	protected $name;
-	/**
-	 * @var string
-	 */
-	protected $title;
+	protected string $id;
+	protected string $name;
+	protected string $title;
 	/** @var array{'c':string,'a':string,'params':array<string,mixed>} */
-	protected $urlParams;
-	/**
-	 * @var bool
-	 */
-	protected $isActive = false;
+	protected array $urlParams;
+	protected bool $isActive = false;
 
 	/**
 	 * ReadingMode constructor.
diff --git a/app/Models/Search.php b/app/Models/Search.php
index 404b8bfac..56f8d3834 100644
--- a/app/Models/Search.php
+++ b/app/Models/Search.php
@@ -12,64 +12,63 @@ class FreshRSS_Search {
 
 	/**
 	 * This contains the user input string
-	 * @var string
 	 */
-	private $raw_input = '';
+	private string $raw_input = '';
 
 	// The following properties are extracted from the raw input
 	/** @var array<string>|null */
-	private $entry_ids;
+	private ?array $entry_ids = null;
 	/** @var array<int>|null */
-	private $feed_ids;
+	private ?array $feed_ids = null;
 	/** @var array<int>|'*'|null */
-	private $label_ids;
+	private $label_ids = null;
 	/** @var array<string>|null */
-	private $label_names;
+	private ?array $label_names = null;
 	/** @var array<string>|null */
-	private $intitle;
+	private ?array $intitle = null;
 	/** @var int|false|null */
-	private $min_date;
+	private $min_date = null;
 	/** @var int|false|null */
-	private $max_date;
+	private $max_date = null;
 	/** @var int|false|null */
-	private $min_pubdate;
+	private $min_pubdate = null;
 	/** @var int|false|null */
-	private $max_pubdate;
+	private $max_pubdate = null;
 	/** @var array<string>|null */
-	private $inurl;
+	private ?array $inurl = null;
 	/** @var array<string>|null */
-	private $author;
+	private ?array $author = null;
 	/** @var array<string>|null */
-	private $tags;
+	private ?array $tags = null;
 	/** @var array<string>|null */
-	private $search;
+	private ?array $search = null;
 
 	/** @var array<string>|null */
-	private $not_entry_ids;
+	private ?array $not_entry_ids = null;
 	/** @var array<int>|null */
-	private $not_feed_ids;
+	private ?array $not_feed_ids = null;
 	/** @var array<int>|'*'|null */
-	private $not_label_ids;
+	private $not_label_ids = null;
 	/** @var array<string>|null */
-	private $not_label_names;
+	private ?array $not_label_names = null;
 	/** @var array<string>|null */
-	private $not_intitle;
+	private ?array $not_intitle = null;
 	/** @var int|false|null */
-	private $not_min_date;
+	private $not_min_date = null;
 	/** @var int|false|null */
-	private $not_max_date;
+	private $not_max_date = null;
 	/** @var int|false|null */
-	private $not_min_pubdate;
+	private $not_min_pubdate = null;
 	/** @var int|false|null */
-	private $not_max_pubdate;
+	private $not_max_pubdate = null;
 	/** @var array<string>|null */
-	private $not_inurl;
+	private ?array $not_inurl = null;
 	/** @var array<string>|null */
-	private $not_author;
+	private ?array $not_author = null;
 	/** @var array<string>|null */
-	private $not_tags;
+	private ?array $not_tags = null;
 	/** @var array<string>|null */
-	private $not_search;
+	private ?array $not_search = null;
 
 	public function __construct(string $input) {
 		$input = self::cleanSearch($input);
diff --git a/app/Models/Share.php b/app/Models/Share.php
index ae2c4a6b8..b0665a07c 100644
--- a/app/Models/Share.php
+++ b/app/Models/Share.php
@@ -8,7 +8,7 @@ class FreshRSS_Share {
 	 * The list of available sharing options.
 	 * @var array<string,FreshRSS_Share>
 	 */
-	private static $list_sharing = [];
+	private static array $list_sharing = [];
 
 	/**
 	 * Register a new sharing option.
@@ -71,45 +71,31 @@ class FreshRSS_Share {
 	}
 
 
-	/** @var string */
-	private $type;
-	/** @var string */
-	private $name;
-	/** @var string */
-	private $url_transform;
+	private string $type;
+	private string $name;
+	private string $url_transform;
 	/** @var array<callable>|array<string,array<callable>> */
-	private $transforms;
+	private array $transforms;
 	/**
 	 * @phpstan-var 'simple'|'advanced'
-	 * @var string
 	 */
-	private $form_type;
-	/** @var string */
-	private $help_url;
-	/** @var string|null */
-	private $custom_name = null;
-	/** @var string|null */
-	private $base_url = null;
-	/** @var string|null */
-	private $id = null;
-	/** @var string|null */
-	private $title = null;
-	/** @var string|null */
-	private $link = null;
-	/** @var bool */
-	private $isDeprecated;
+	private string $form_type;
+	private string $help_url;
+	private ?string $custom_name = null;
+	private ?string $base_url = null;
+	private ?string $id = null;
+	private ?string $title = null;
+	private ?string $link = null;
+	private bool $isDeprecated;
 	/**
 	 * @phpstan-var 'GET'|'POST'
-	 * @var string
 	 */
-	private $method;
-	/** @var string|null */
-	private $field;
+	private string $method;
+	private ?string $field;
 	/**
 	 * @phpstan-var 'button'|null
-	 * @var string
 	 */
-	private $HTMLtag;
+	private ?string $HTMLtag;
 
 	/**
 	 * Create a FreshRSS_Share object.
diff --git a/app/Models/Tag.php b/app/Models/Tag.php
index 4ab28a286..920422ac8 100644
--- a/app/Models/Tag.php
+++ b/app/Models/Tag.php
@@ -1,26 +1,15 @@
 <?php
 
 class FreshRSS_Tag extends Minz_Model {
-	/**
-	 * @var int
-	 */
-	private $id = 0;
-	/**
-	 * @var string
-	 */
-	private $name;
+
+	private int $id = 0;
+	private string $name;
 	/**
 	 * @var array<string,mixed>
 	 */
-	private $attributes = [];
-	/**
-	 * @var int
-	 */
-	private $nbEntries = -1;
-	/**
-	 * @var int
-	 */
-	private $nbUnread = -1;
+	private array $attributes = [];
+	private int $nbEntries = -1;
+	private int $nbUnread = -1;
 
 	public function __construct(string $name = '') {
 		$this->_name($name);
diff --git a/app/Models/Themes.php b/app/Models/Themes.php
index 24539855b..ab99ea63c 100644
--- a/app/Models/Themes.php
+++ b/app/Models/Themes.php
@@ -1,12 +1,10 @@
 <?php
 
 class FreshRSS_Themes extends Minz_Model {
-	/** @var string */
-	private static $themesUrl = '/themes/';
-	/** @var string */
-	private static $defaultIconsUrl = '/themes/icons/';
-	/** @var string */
-	public static $defaultTheme = 'Origine';
+
+	private static string $themesUrl = '/themes/';
+	private static string $defaultIconsUrl = '/themes/icons/';
+	public static string $defaultTheme = 'Origine';
 
 	/** @return array<string> */
 	public static function getList(): array {
@@ -51,10 +49,9 @@ class FreshRSS_Themes extends Minz_Model {
 		return false;
 	}
 
-	/** @var string */
-	private static $themeIconsUrl;
+	private static string $themeIconsUrl;
 	/** @var array<string,int> */
-	private static $themeIcons;
+	private static array $themeIcons;
 
 	/**
 	 * @return false|array{'id':string,'name':string,'author':string,'description':string,'version':float|string,'files':array<string>,'theme-color'?:string|array{'dark'?:string,'light'?:string,'default'?:string}}
diff --git a/app/Models/UserQuery.php b/app/Models/UserQuery.php
index 2f7968315..3454ede31 100644
--- a/app/Models/UserQuery.php
+++ b/app/Models/UserQuery.php
@@ -8,30 +8,18 @@
  */
 class FreshRSS_UserQuery {
 
-	/** @var bool */
-	private $deprecated = false;
-	/** @var string */
-	private $get = '';
-	/** @var string */
-	private $get_name = '';
-	/** @var string */
-	private $get_type = '';
-	/** @var string */
-	private $name = '';
-	/** @var string */
-	private $order = '';
-	/** @var FreshRSS_BooleanSearch */
-	private $search;
-	/** @var int */
-	private $state = 0;
-	/** @var string */
-	private $url = '';
-	/** @var FreshRSS_FeedDAO|null */
-	private $feed_dao;
-	/** @var FreshRSS_CategoryDAO|null */
-	private $category_dao;
-	/** @var FreshRSS_TagDAO|null */
-	private $tag_dao;
+	private bool $deprecated = false;
+	private string $get = '';
+	private string $get_name = '';
+	private string $get_type = '';
+	private string $name = '';
+	private string $order = '';
+	private FreshRSS_BooleanSearch $search;
+	private int $state = 0;
+	private string $url = '';
+	private ?FreshRSS_FeedDAO $feed_dao;
+	private ?FreshRSS_CategoryDAO $category_dao;
+	private ?FreshRSS_TagDAO $tag_dao;
 
 	/**
 	 * @param array{'get'?:string,'name'?:string,'order'?:string,'search'?:string,'state'?:int,'url'?:string} $query
diff --git a/app/Models/View.php b/app/Models/View.php
index f1bc55707..b8d776fbc 100644
--- a/app/Models/View.php
+++ b/app/Models/View.php
@@ -10,166 +10,121 @@ class FreshRSS_View extends Minz_View {
 	/** @var callable */
 	public $callbackBeforePagination;
 	/** @var array<FreshRSS_Category> */
-	public $categories;
-	/** @var FreshRSS_Category|null */
-	public $category;
-	/** @var string */
-	public $current_user;
+	public array $categories;
+	public ?FreshRSS_Category $category;
+	public string $current_user;
 	/** @var iterable<FreshRSS_Entry> */
 	public $entries;
-	/** @var FreshRSS_Entry */
-	public $entry;
-	/** @var FreshRSS_Feed|null */
-	public $feed;
+	public FreshRSS_Entry $entry;
+	public ?FreshRSS_Feed $feed;
 	/** @var array<FreshRSS_Feed> */
-	public $feeds;
-	/** @var int */
-	public $nbUnreadTags;
+	public array $feeds;
+	public int $nbUnreadTags;
 	/** @var array<FreshRSS_Tag> */
-	public $tags;
+	public array $tags;
 	/** @var array<int,array{'id':int,'name':string,'id_entry':string,'checked':bool}> */
-	public $tagsForEntry;
+	public array $tagsForEntry;
 	/** @var array<string,array<string>> */
-	public $tagsForEntries;
+	public array $tagsForEntries;
 	/** @var array<string,string> */
-	public $notification;
-	/** @var bool */
-	public $excludeMutedFeeds;
+	public array $notification;
+	public bool $excludeMutedFeeds;
 
 	// Substriptions
-	/** @var FreshRSS_Category|null */
-	public $default_category;
-	/** @var bool */
-	public $displaySlider;
-	/** @var bool */
-	public $load_ok;
-	/** @var bool */
-	public $onlyFeedsWithError;
-	/** @var bool */
-	public $signalError;
+	public ?FreshRSS_Category $default_category;
+	public bool $displaySlider = false;
+	public bool $load_ok;
+	public bool $onlyFeedsWithError;
+	public bool $signalError;
 
 	// Manage users
 	/** @var array{'feed_count':int,'article_count':int,'database_size':int,'language':string,'mail_login':string,'enabled':bool,'is_admin':bool,'last_user_activity':string,'is_default':bool} */
-	public $details;
-	/** @var bool */
-	public $disable_aside;
-	/** @var bool */
-	public $show_email_field;
-	/** @var string */
-	public $username;
+	public array $details;
+	public bool $disable_aside;
+	public bool $show_email_field;
+	public string $username;
 	/** @var array<array{'language':string,'enabled':bool,'is_admin':bool,'enabled':bool,'article_count':int,'database_size':int,'last_user_activity':string,'mail_login':string,'feed_count':int,'is_default':bool}> */
-	public $users;
+	public array $users;
 
 	// Updates
-	/** @var string */
-	public $last_update_time;
+	public string $last_update_time;
 	/** @var array<string,bool> */
-	public $status_files;
+	public array $status_files;
 	/** @var array<string,bool> */
-	public $status_php;
-	/** @var bool */
-	public $update_to_apply;
+	public array $status_php;
+	public bool $update_to_apply;
 	/** @var array<string,bool> */
-	public $status_database;
-	/** @var bool */
-	public $is_release_channel_stable;
+	public array $status_database;
+	public bool $is_release_channel_stable;
 
 	// Archiving
-	/** @var int */
-	public $nb_total;
-	/** @var int */
-	public $size_total;
-	/** @var int */
-	public $size_user;
+	public int $nb_total;
+	public int $size_total;
+	public int $size_user;
 
 	// Display
 	/** @var array<string,array{'id':string,'name':string,'author':string,'description':string,'version':float|string,'files':array<string>,'theme-color'?:string|array{'dark'?:string,'light'?:string,'default'?:string}}> */
-	public $themes;
+	public array $themes;
 
 	// Shortcuts
 	/** @var array<int, string> */
-	public $list_keys;
+	public array $list_keys;
 
 	// User queries
 	/** @var array<int,FreshRSS_UserQuery> */
-	public $queries;
+	public array $queries;
 	/**  @var FreshRSS_UserQuery|null */
-	public $query;
+	public ?FreshRSS_UserQuery $query = null;
 
 	// Export / Import
-	/** @var string */
-	public $content;
+	public string $content;
 	/** @var array<string,array<string>> */
-	public $entryIdsTagNames;
-	/** @var string */
-	public $list_title;
-	/** @var int */
-	public $queryId;
-	/** @var string */
-	public $type;
+	public array $entryIdsTagNames;
+	public string $list_title;
+	public int $queryId;
+	public string $type;
 
 	// Form login
-	/** @var int */
-	public $cookie_days;
+	public int $cookie_days;
 
 	// Registration
-	/** @var bool */
-	public $can_register;
-	/** @var string */
-	public $preferred_language;
-	/** @var bool */
-	public $show_tos_checkbox;
-	/** @var string */
-	public $terms_of_service;
-	/** @var string */
-	public $site_title;
-	/** @var string */
-	public $validation_url;
+	public bool $can_register;
+	public string $preferred_language;
+	public bool $show_tos_checkbox;
+	public string $terms_of_service;
+	public string $site_title;
+	public string $validation_url;
 
 	// Logs
-	/** @var int */
-	public $currentPage;
-	/** @var Minz_Paginator */
-	public $logsPaginator;
-	/** @var int */
-	public $nbPage;
+	public int $currentPage;
+	public Minz_Paginator $logsPaginator;
+	public int $nbPage;
 
 	// RSS view
-	/** @var string */
-	public $rss_title = '';
-	/** @var string */
-	public $rss_url = '';
-	/** @var string */
-	public $rss_base = '';
-	/** @var bool */
-	public $internal_rendering = false;
+	public string $rss_title = '';
+	public string $rss_url = '';
+	public string $rss_base = '';
+	public bool $internal_rendering = false;
 
 	// Content preview
-	/** @var string */
-	public $fatalError;
-	/** @var string */
-	public $htmlContent;
-	/** @var bool */
-	public $selectorSuccess;
+	public string $fatalError;
+	public string $htmlContent;
+	public bool $selectorSuccess;
 
 	// Extensions
 	/** @var array<string,array{'name':string,'author':string,'description':string,'version':string,'entrypoint':string,'type':'system'|'user','url':string,'method':string,'directory':string}> */
-	public $available_extensions;
-	/** @var ?Minz_Extension */
-	public $ext_details;
+	public array $available_extensions;
+	public ?Minz_Extension $ext_details;
 	/** @var array{'system':array<Minz_Extension>,'user':array<Minz_Extension>} */
-	public $extension_list;
-	/** @var ?Minz_Extension */
-	public $extension;
+	public array $extension_list;
+	public ?Minz_Extension $extension;
 	/** @var array<string,string> */
-	public $extensions_installed;
+	public array $extensions_installed;
 
 	// Errors
-	/** @var string */
-	public $code;
-	/** @var string */
-	public $errorMessage;
+	public string $code;
+	public string $errorMessage;
 	/** @var array<string,string> */
-	public $message;
+	public array $message;
 
 }
diff --git a/app/Models/ViewJavascript.php b/app/Models/ViewJavascript.php
index 62d0339eb..157ebe4ae 100644
--- a/app/Models/ViewJavascript.php
+++ b/app/Models/ViewJavascript.php
@@ -5,14 +5,12 @@ declare(strict_types=1);
 final class FreshRSS_ViewJavascript extends FreshRSS_View {
 
 	/** @var array<FreshRSS_Category> */
-	public $categories;
+	public array $categories;
 	/** @var array<FreshRSS_Feed> */
-	public $feeds;
+	public array $feeds;
 	/** @var array<FreshRSS_Tag> */
-	public $tags;
+	public array $tags;
 
-	/** @var string */
-	public $nonce;
-	/** @var string */
-	public $salt1;
+	public string $nonce;
+	public string $salt1;
 }
diff --git a/app/Models/ViewStats.php b/app/Models/ViewStats.php
index 9025a86db..f07c19c91 100644
--- a/app/Models/ViewStats.php
+++ b/app/Models/ViewStats.php
@@ -4,54 +4,47 @@ declare(strict_types=1);
 
 final class FreshRSS_ViewStats extends FreshRSS_View {
 
-	/** @var FreshRSS_Category|null */
-	public $default_category;
+	public ?FreshRSS_Category $default_category;
 	/** @var array<FreshRSS_Category> */
-	public $categories;
-	/** @var FreshRSS_Feed|null */
-	public $feed;
+	public array $categories;
+	public ?FreshRSS_Feed $feed;
 	/** @var array<FreshRSS_Feed> */
-	public $feeds;
-	/** @var bool */
-	public $displaySlider;
+	public array $feeds;
+	public bool $displaySlider = false;
 
-	/** @var float */
-	public $average;
-	/** @var float */
-	public $averageDayOfWeek;
-	/** @var float */
-	public $averageHour;
-	/** @var float */
-	public $averageMonth;
+	public float $average;
+	public float $averageDayOfWeek;
+	public float $averageHour;
+	public float $averageMonth;
 	/** @var array<string> */
-	public $days;
+	public array $days;
 	/** @var array<string,array<int,int|string>> */
-	public $entryByCategory;
+	public array $entryByCategory;
 	/** @var array<int,int> */
-	public $entryCount;
+	public array $entryCount;
 	/** @var array<string,array<int,int|string>> */
-	public $feedByCategory;
+	public array $feedByCategory;
 	/** @var array<int, string> */
-	public $hours24Labels;
+	public array $hours24Labels;
 	/** @var array<string,array<int,array<string,int|string>>> */
-	public $idleFeeds;
+	public array $idleFeeds;
 	/** @var array<int,string> */
-	public $last30DaysLabel;
+	public array $last30DaysLabel;
 	/** @var array<int,string> */
-	public $last30DaysLabels;
+	public array $last30DaysLabels;
 	/** @var array<string,string> */
-	public $months;
+	public array $months;
 	/** @var array{'total':int,'count_unreads':int,'count_reads':int,'count_favorites':int}|false */
 	public $repartition;
 	/** @var array{'main_stream':array{'total':int,'count_unreads':int,'count_reads':int,'count_favorites':int}|false,'all_feeds':array{'total':int,'count_unreads':int,'count_reads':int,'count_favorites':int}|false} */
-	public $repartitions;
+	public array $repartitions;
 	/** @var array<int,int> */
-	public $repartitionDayOfWeek;
+	public array $repartitionDayOfWeek;
 	/** @var array<string,int>|array<int,int> */
-	public $repartitionHour;
+	public array $repartitionHour;
 	/** @var array<int,int> */
-	public $repartitionMonth;
+	public array $repartitionMonth;
 	/** @var array<array{'id':int,'name':string,'category':string,'count':int}> */
-	public $topFeed;
+	public array $topFeed;
 
 }
diff --git a/app/Services/ExportService.php b/app/Services/ExportService.php
index d3a3373a5..80531f3fc 100644
--- a/app/Services/ExportService.php
+++ b/app/Services/ExportService.php
@@ -4,20 +4,16 @@
  * Provide useful methods to generate files to export.
  */
 class FreshRSS_Export_Service {
-	/** @var string */
-	private $username;
 
-	/** @var FreshRSS_CategoryDAO */
-	private $category_dao;
+	private string $username;
 
-	/** @var FreshRSS_FeedDAO */
-	private $feed_dao;
+	private FreshRSS_CategoryDAO $category_dao;
 
-	/** @var FreshRSS_EntryDAO */
-	private $entry_dao;
+	private FreshRSS_FeedDAO $feed_dao;
 
-	/** @var FreshRSS_TagDAO */
-	private $tag_dao;
+	private FreshRSS_EntryDAO $entry_dao;
+
+	private FreshRSS_TagDAO $tag_dao;
 
 	public const FRSS_NAMESPACE = 'https://freshrss.org/opml';
 	public const TYPE_HTML_XPATH = 'HTML+XPath';
diff --git a/app/Services/ImportService.php b/app/Services/ImportService.php
index b70627295..9b013fea4 100644
--- a/app/Services/ImportService.php
+++ b/app/Services/ImportService.php
@@ -4,14 +4,13 @@
  * Provide methods to import files.
  */
 class FreshRSS_Import_Service {
-	/** @var FreshRSS_CategoryDAO */
-	private $catDAO;
 
-	/** @var FreshRSS_FeedDAO */
-	private $feedDAO;
+	private FreshRSS_CategoryDAO $catDAO;
 
-	/** @var bool true if success, false otherwise */
-	private $lastStatus;
+	private FreshRSS_FeedDAO $feedDAO;
+
+	/** true if success, false otherwise */
+	private bool $lastStatus;
 
 	/**
 	 * Initialize the service for the given user.