diff --git a/config/phpstan/phpstan.neon b/config/phpstan/phpstan.neon
index f2612e52..5322d5df 100644
--- a/config/phpstan/phpstan.neon
+++ b/config/phpstan/phpstan.neon
@@ -7,12 +7,6 @@ parameters:
 	ignoreErrors:
 		# Ignore errors caused by Template static class reflection
 		- '#Call to an undefined static method Template::[a-zA-Z0-9\\_]+\(\)\.#'
-
-		# Ignore errors caused by no type hints on class properties, as that's not available till PHP 7.4
-		- '#Property .+? has no type specified.#'
-
-		# Ignore setters for properties that accept several types
-		- '#Property Artwork::\$Tags \(array<ArtworkTag>\) does not accept.+#'
 	level:
 		8
 	paths:
diff --git a/config/sql/se/PollVotes.sql b/config/sql/se/PollVotes.sql
index fd2229ad..d57736db 100644
--- a/config/sql/se/PollVotes.sql
+++ b/config/sql/se/PollVotes.sql
@@ -1,6 +1,6 @@
 CREATE TABLE `PollVotes` (
   `UserId` int(10) unsigned NOT NULL,
   `PollItemId` int(10) unsigned NOT NULL,
-  `Created` timestamp NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
+  `Created` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
   UNIQUE KEY `idxUnique` (`PollItemId`,`UserId`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/lib/Artist.php b/lib/Artist.php
index 904f73f1..a276826d 100644
--- a/lib/Artist.php
+++ b/lib/Artist.php
@@ -8,20 +8,18 @@ use Safe\DateTimeImmutable;
  * @property ?array<string> $AlternateNames
  */
 class Artist{
-	/**
-	 * @var array<string> $_AlternateNames
-	 */
-
 	use Traits\Accessor;
 
 	public ?int $ArtistId = null;
 	public ?string $Name = null;
 	public ?DateTimeImmutable $Created = null;
 	public ?DateTimeImmutable $Updated = null;
+
 	protected ?int $_DeathYear = null;
 	protected ?string $_UrlName = null;
 	protected ?string $_Url = null;
-	protected $_AlternateNames = null; // Don't type hint this here, otherwise PHPStan will complain
+	/** @var ?array<string> $_AlternateNames */
+	protected $_AlternateNames = null;
 
 	// *******
 	// SETTERS
diff --git a/lib/Artwork.php b/lib/Artwork.php
index 1f3a37f0..cd18d966 100644
--- a/lib/Artwork.php
+++ b/lib/Artwork.php
@@ -1,12 +1,5 @@
 <?
-
-use Exceptions\InvalidImageUploadException;
-use Exceptions\InvalidPageScanUrlException;
-use Exceptions\InvalidUrlException;
 use Safe\DateTimeImmutable;
-use Safe\Exceptions\ExecException;
-use Safe\Exceptions\FilesystemException;
-use Safe\Exceptions\PcreException;
 
 use function Safe\copy;
 use function Safe\exec;
@@ -19,7 +12,8 @@ use function Safe\preg_replace;
  * @property string $UrlName
  * @property string $Url
  * @property string $EditUrl
- * @property array<ArtworkTag> $Tags
+ * @property-read array<ArtworkTag> $Tags
+ * @property-write array<ArtworkTag>|string $Tags
  * @property Artist $Artist
  * @property string $ImageUrl
  * @property string $ThumbUrl
@@ -56,9 +50,11 @@ class Artwork{
 	public ?string $Notes = null;
 	public ?ImageMimeType $MimeType = null;
 	public ?ArtworkStatus $Status = null;
+
 	protected ?string $_UrlName = null;
 	protected ?string $_Url = null;
 	protected ?string $_EditUrl = null;
+	/** @var ?array<ArtworkTag> $_Tags */
 	protected $_Tags = null;
 	protected ?Artist $_Artist = null;
 	protected ?string $_ImageUrl = null;
diff --git a/lib/ArtworkTag.php b/lib/ArtworkTag.php
index cfef1db0..3605f2b9 100644
--- a/lib/ArtworkTag.php
+++ b/lib/ArtworkTag.php
@@ -1,7 +1,4 @@
 <?
-
-use Exceptions\InvalidArtworkTagException;
-
 use function Safe\preg_match;
 use function Safe\preg_replace;
 
@@ -50,7 +47,7 @@ class ArtworkTag extends Tag{
 	}
 
 	/**
-	 * @throws InvalidArtworkTagException
+	 * @throws Exceptions\InvalidArtworkTagException
 	 */
 	public function Create(): void{
 		$this->Validate();
diff --git a/lib/AtomFeed.php b/lib/AtomFeed.php
index 52ba67f6..5e338081 100644
--- a/lib/AtomFeed.php
+++ b/lib/AtomFeed.php
@@ -12,7 +12,7 @@ class AtomFeed extends Feed{
 	 * @param string $subtitle
 	 * @param string $url
 	 * @param string $path
-	 * @param array<Ebook> $entries
+	 * @param array<Ebook|OpdsNavigationEntry> $entries
 	 */
 	public function __construct(string $title, string $subtitle, string $url, string $path, array $entries){
 		parent::__construct($title, $url, $path, $entries);
diff --git a/lib/Ebook.php b/lib/Ebook.php
index 3adf0b22..e40ff60c 100644
--- a/lib/Ebook.php
+++ b/lib/Ebook.php
@@ -11,18 +11,6 @@ use function Safe\preg_replace;
 use function Safe\sprintf;
 use function Safe\shell_exec;
 
-/**
- * @property array<GitCommit> $GitCommits
- * @property array<EbookTag> $EbookTags
- * @property array<string> $LocTags
- * @property array<Collection> $Collections
- * @property array<EbookSource> $Sources
- * @property array<Contributor> $Authors
- * @property array<Contributor> $Illustrators
- * @property array<Contributor> $Translators
- * @property array<Contributor> $Contributors
- * @property ?array<string> $TocEntries
- */
 class Ebook{
 	public string $WwwFilesystemPath;
 	public string $RepoFilesystemPath;
@@ -33,9 +21,13 @@ class Ebook{
 	public string $KepubUrl;
 	public string $Azw3Url;
 	public bool $HasDownloads;
+	/** @var array<GitCommit> $GitCommits */
 	public $GitCommits = [];
+	/** @var array<EbookTag> $Tags */
 	public $Tags = [];
+	/** @var array<string> $LocTags */
 	public $LocTags = [];
+	/** @var array<Collection> $Collections */
 	public $Collections = [];
 	public string $Identifier;
 	public string $UrlSafeIdentifier;
@@ -60,12 +52,17 @@ class Ebook{
 	public string $ReadingTime;
 	public ?string $GitHubUrl = null;
 	public ?string $WikipediaUrl = null;
+	/** @var array<EbookSource> $Sources */
 	public $Sources = [];
+	/** @var array<Contributor> $Authors */
 	public $Authors = [];
 	public string $AuthorsHtml;
 	public string $AuthorsUrl; // This is a single URL even if there are multiple authors; for example, /ebooks/karl-marx_friedrich-engels/
+	/** @var array<Contributor> $Illustrators */
 	public $Illustrators = [];
+	/** @var array<Contributor> $Translators */
 	public $Translators = [];
+	/** @var array<Contributor> $Contributors */
 	public $Contributors = [];
 	public ?string $ContributorsHtml = null;
 	public string $TitleWithCreditsHtml = '';
@@ -75,6 +72,7 @@ class Ebook{
 	public string $TextSinglePageUrl;
 	public ?string $TextSinglePageSizeNumber = null;
 	public ?string $TextSinglePageSizeUnit = null;
+	/** @var ?array<string> $TocEntries */
 	public $TocEntries = null; // A list of non-Roman ToC entries ONLY IF the work has the 'se:is-a-collection' metadata element, null otherwise
 
 	/**
diff --git a/lib/Email.php b/lib/Email.php
index 01ab1fc1..d06307fa 100644
--- a/lib/Email.php
+++ b/lib/Email.php
@@ -2,9 +2,6 @@
 use PHPMailer\PHPMailer\PHPMailer;
 use PHPMailer\PHPMailer\Exception;
 
-/**
- * @property array<array<string>> $Attachments
- */
 class Email{
 	public string $To = '';
 	public string $ToName = '';
@@ -14,6 +11,7 @@ class Email{
 	public string $Subject = '';
 	public string $Body = '';
 	public string $TextBody = '';
+	/** @var array<array<string>> $Attachments */
 	public $Attachments = [];
 	public ?string $PostmarkStream = null;
 
diff --git a/lib/Exceptions/ArtistNameRequiredException.php b/lib/Exceptions/ArtistNameRequiredException.php
index 6b266f44..a018955f 100644
--- a/lib/Exceptions/ArtistNameRequiredException.php
+++ b/lib/Exceptions/ArtistNameRequiredException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class ArtistNameRequiredException extends AppException{
+	/** @var string $message */
 	protected $message = 'An artist name is required.';
 }
diff --git a/lib/Exceptions/ArtistNotFoundException.php b/lib/Exceptions/ArtistNotFoundException.php
index 67e0a3d8..6b2c76ef 100644
--- a/lib/Exceptions/ArtistNotFoundException.php
+++ b/lib/Exceptions/ArtistNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class ArtistNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that artist.';
 }
diff --git a/lib/Exceptions/ArtworkAlreadyExistsException.php b/lib/Exceptions/ArtworkAlreadyExistsException.php
index e3aca999..c20771d1 100644
--- a/lib/Exceptions/ArtworkAlreadyExistsException.php
+++ b/lib/Exceptions/ArtworkAlreadyExistsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class ArtworkAlreadyExistsException extends AppException{
+	/** @var string $message */
 	protected $message = 'An artwork with this name already exists.';
 }
diff --git a/lib/Exceptions/ArtworkImageDimensionsTooSmallException.php b/lib/Exceptions/ArtworkImageDimensionsTooSmallException.php
index a88172d6..a02d23f0 100644
--- a/lib/Exceptions/ArtworkImageDimensionsTooSmallException.php
+++ b/lib/Exceptions/ArtworkImageDimensionsTooSmallException.php
@@ -2,10 +2,10 @@
 namespace Exceptions;
 
 class ArtworkImageDimensionsTooSmallException extends AppException{
-	protected $message;
-
 	// This has to be initialized in a constructor because we use the number_format() function.
 	public function __construct(){
 		$this->message = 'Image dimensions are too small. The minimum image size is ' . number_format(ARTWORK_IMAGE_MINIMUM_WIDTH) . ' × ' . number_format(ARTWORK_IMAGE_MINIMUM_HEIGHT) . '.';
+
+		parent::__construct($this->message);
 	}
 }
diff --git a/lib/Exceptions/ArtworkNameRequiredException.php b/lib/Exceptions/ArtworkNameRequiredException.php
index d4e83b41..8786620c 100644
--- a/lib/Exceptions/ArtworkNameRequiredException.php
+++ b/lib/Exceptions/ArtworkNameRequiredException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class ArtworkNameRequiredException extends AppException{
+	/** @var string $message */
 	protected $message = 'An artwork name is required.';
 }
diff --git a/lib/Exceptions/ArtworkNotFoundException.php b/lib/Exceptions/ArtworkNotFoundException.php
index 18aa15e2..119bb384 100644
--- a/lib/Exceptions/ArtworkNotFoundException.php
+++ b/lib/Exceptions/ArtworkNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class ArtworkNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that artwork.';
 }
diff --git a/lib/Exceptions/DuplicateDatabaseKeyException.php b/lib/Exceptions/DuplicateDatabaseKeyException.php
index 6ec98c8b..dfb8c8d1 100644
--- a/lib/Exceptions/DuplicateDatabaseKeyException.php
+++ b/lib/Exceptions/DuplicateDatabaseKeyException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class DuplicateDatabaseKeyException extends AppException{
+	/** @var string $message */
 	protected $message = 'An attempted row insertion has violated the database unique index.';
 }
diff --git a/lib/Exceptions/InvalidArtistException.php b/lib/Exceptions/InvalidArtistException.php
index 275fb722..1ba383ee 100644
--- a/lib/Exceptions/InvalidArtistException.php
+++ b/lib/Exceptions/InvalidArtistException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidArtistException extends ValidationException{
+	/** @var string $message */
 	protected $message = 'Artist is invalid.';
 }
diff --git a/lib/Exceptions/InvalidArtworkException.php b/lib/Exceptions/InvalidArtworkException.php
index 09d9fc05..5bfa923d 100644
--- a/lib/Exceptions/InvalidArtworkException.php
+++ b/lib/Exceptions/InvalidArtworkException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidArtworkException extends ValidationException{
+	/** @var string $message */
 	protected $message = 'Artwork is invalid.';
 }
diff --git a/lib/Exceptions/InvalidArtworkPageUrlException.php b/lib/Exceptions/InvalidArtworkPageUrlException.php
index 72ffcb43..312b8a1d 100644
--- a/lib/Exceptions/InvalidArtworkPageUrlException.php
+++ b/lib/Exceptions/InvalidArtworkPageUrlException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidArtworkPageUrlException extends InvalidUrlException{
+	/** @var string $message */
 	protected $message = 'Invalid link to page with artwork.';
 }
diff --git a/lib/Exceptions/InvalidArtworkTagException.php b/lib/Exceptions/InvalidArtworkTagException.php
index b24a28c0..9731803e 100644
--- a/lib/Exceptions/InvalidArtworkTagException.php
+++ b/lib/Exceptions/InvalidArtworkTagException.php
@@ -2,11 +2,14 @@
 namespace Exceptions;
 
 class InvalidArtworkTagException extends ValidationException{
+	/** @var string $message */
 	protected $message = 'Artwork tag is invalid.';
 
 	public function __construct(?string $tagName){
 		if($tagName !== null && trim($tagName) != ''){
 			$this->message = 'Artwork tag ' . $tagName . ' is invalid.';
 		}
+
+		parent::__construct($this->message);
 	}
 }
diff --git a/lib/Exceptions/InvalidArtworkTagNameException.php b/lib/Exceptions/InvalidArtworkTagNameException.php
index dba53335..6fae593d 100644
--- a/lib/Exceptions/InvalidArtworkTagNameException.php
+++ b/lib/Exceptions/InvalidArtworkTagNameException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidArtworkTagNameException extends AppException{
+	/** @var string $message */
 	protected $message = 'Artwork tags can only contain letters and numbers.';
 }
diff --git a/lib/Exceptions/InvalidCaptchaException.php b/lib/Exceptions/InvalidCaptchaException.php
index 47e23d6a..b1904287 100644
--- a/lib/Exceptions/InvalidCaptchaException.php
+++ b/lib/Exceptions/InvalidCaptchaException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidCaptchaException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t validate your CAPTCHA response.';
 }
diff --git a/lib/Exceptions/InvalidCompletedYearException.php b/lib/Exceptions/InvalidCompletedYearException.php
index 6f4aa744..e8828ebe 100644
--- a/lib/Exceptions/InvalidCompletedYearException.php
+++ b/lib/Exceptions/InvalidCompletedYearException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidCompletedYearException extends AppException{
+	/** @var string $message */
 	protected $message = 'Invalid year of completion.';
 }
diff --git a/lib/Exceptions/InvalidCopyrightPageUrlException.php b/lib/Exceptions/InvalidCopyrightPageUrlException.php
index e35fb451..ff5b9f4c 100644
--- a/lib/Exceptions/InvalidCopyrightPageUrlException.php
+++ b/lib/Exceptions/InvalidCopyrightPageUrlException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidCopyrightPageUrlException extends InvalidUrlException{
+	/** @var string $message */
 	protected $message = 'Invalid link to page with copyright details.';
 }
diff --git a/lib/Exceptions/InvalidCredentialsException.php b/lib/Exceptions/InvalidCredentialsException.php
index 5b0dcb0f..4fc8801f 100644
--- a/lib/Exceptions/InvalidCredentialsException.php
+++ b/lib/Exceptions/InvalidCredentialsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidCredentialsException extends AppException{
+	/** @var string $message */
 	protected $message = 'Invalid credentials.';
 }
diff --git a/lib/Exceptions/InvalidDeathYearException.php b/lib/Exceptions/InvalidDeathYearException.php
index b5513c68..0b1d119f 100644
--- a/lib/Exceptions/InvalidDeathYearException.php
+++ b/lib/Exceptions/InvalidDeathYearException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidDeathYearException extends AppException{
+	/** @var string $message */
 	protected $message = 'Invalid year of death.';
 }
diff --git a/lib/Exceptions/InvalidEmailException.php b/lib/Exceptions/InvalidEmailException.php
index d2af6ef1..4dcfbe55 100644
--- a/lib/Exceptions/InvalidEmailException.php
+++ b/lib/Exceptions/InvalidEmailException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidEmailException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t understand your email address.';
 }
diff --git a/lib/Exceptions/InvalidImageUploadException.php b/lib/Exceptions/InvalidImageUploadException.php
index 19b9fe60..b5f01181 100644
--- a/lib/Exceptions/InvalidImageUploadException.php
+++ b/lib/Exceptions/InvalidImageUploadException.php
@@ -3,11 +3,6 @@
 namespace Exceptions;
 
 class InvalidImageUploadException extends AppException{
-	public function __construct(?string $message = null){
-		if($message === null){
-			$message = 'Uploaded image is invalid.';
-		}
-
-		parent::__construct($message);
-	}
+	/** @var string $message */
+	protected $message = 'Uploaded image is invalid.';
 }
diff --git a/lib/Exceptions/InvalidLoginException.php b/lib/Exceptions/InvalidLoginException.php
index cbc758f8..2a3666e8 100644
--- a/lib/Exceptions/InvalidLoginException.php
+++ b/lib/Exceptions/InvalidLoginException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidLoginException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t validate your login information.';
 }
diff --git a/lib/Exceptions/InvalidMimeTypeException.php b/lib/Exceptions/InvalidMimeTypeException.php
index e014e11e..0c7e8d77 100644
--- a/lib/Exceptions/InvalidMimeTypeException.php
+++ b/lib/Exceptions/InvalidMimeTypeException.php
@@ -3,5 +3,6 @@
 namespace Exceptions;
 
 class InvalidMimeTypeException extends AppException{
+	/** @var string $message */
 	protected $message = 'Uploaded image must be a JPG, BMP, PNG, or TIFF file.';
 }
diff --git a/lib/Exceptions/InvalidMuseumUrlException.php b/lib/Exceptions/InvalidMuseumUrlException.php
index 4df7c7f0..02c30ece 100644
--- a/lib/Exceptions/InvalidMuseumUrlException.php
+++ b/lib/Exceptions/InvalidMuseumUrlException.php
@@ -4,5 +4,7 @@ namespace Exceptions;
 class InvalidMuseumUrlException extends InvalidUrlException{
 	public function __construct(string $url, string $exampleUrl){
 		$this->message = 'Invalid museum URL: <' . $url . '>. Expected a URL like: <'. $exampleUrl . '>.';
+
+		parent::__construct($this->message);
 	}
 }
diff --git a/lib/Exceptions/InvalidNewsletterSubscription.php b/lib/Exceptions/InvalidNewsletterSubscription.php
index af2ae23f..d9f81af6 100644
--- a/lib/Exceptions/InvalidNewsletterSubscription.php
+++ b/lib/Exceptions/InvalidNewsletterSubscription.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidNewsletterSubscription extends ValidationException{
+	/** @var string $message */
 	protected $message = 'Newsletter subscription is invalid.';
 }
diff --git a/lib/Exceptions/InvalidPageScanUrlException.php b/lib/Exceptions/InvalidPageScanUrlException.php
index a7d37f83..a9825d79 100644
--- a/lib/Exceptions/InvalidPageScanUrlException.php
+++ b/lib/Exceptions/InvalidPageScanUrlException.php
@@ -4,5 +4,7 @@ namespace Exceptions;
 class InvalidPageScanUrlException extends InvalidUrlException{
 	public function __construct(string $url, string $exampleUrl){
 		$this->message = 'Invalid page scan URL: <' . $url . '>. Expected a URL like: <'. $exampleUrl . '>.';
+
+		parent::__construct($this->message);
 	}
 }
diff --git a/lib/Exceptions/InvalidPermissionsException.php b/lib/Exceptions/InvalidPermissionsException.php
index 0e8ae3c1..06630b1f 100644
--- a/lib/Exceptions/InvalidPermissionsException.php
+++ b/lib/Exceptions/InvalidPermissionsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidPermissionsException extends AppException{
+	/** @var string $message */
 	protected $message = 'You don’t have permission to perform that action.';
 }
diff --git a/lib/Exceptions/InvalidPollVoteException.php b/lib/Exceptions/InvalidPollVoteException.php
index 609eb526..eefddab2 100644
--- a/lib/Exceptions/InvalidPollVoteException.php
+++ b/lib/Exceptions/InvalidPollVoteException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidPollVoteException extends ValidationException{
+	/** @var string $message */
 	protected $message = 'Vote is invalid.';
 }
diff --git a/lib/Exceptions/InvalidPublicationYearException.php b/lib/Exceptions/InvalidPublicationYearException.php
index 84925d74..52a16c20 100644
--- a/lib/Exceptions/InvalidPublicationYearException.php
+++ b/lib/Exceptions/InvalidPublicationYearException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidPublicationYearException extends AppException{
+	/** @var string $message */
 	protected $message = 'Invalid year of publication.';
 }
diff --git a/lib/Exceptions/InvalidPublicationYearPageUrlException.php b/lib/Exceptions/InvalidPublicationYearPageUrlException.php
index 0824e71e..cf869fe6 100644
--- a/lib/Exceptions/InvalidPublicationYearPageUrlException.php
+++ b/lib/Exceptions/InvalidPublicationYearPageUrlException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidPublicationYearPageUrlException extends InvalidUrlException{
+	/** @var string $message */
 	protected $message = 'Invalid link to page with year of publication.';
 }
diff --git a/lib/Exceptions/InvalidRequestException.php b/lib/Exceptions/InvalidRequestException.php
index 68d1b6fc..d6880888 100644
--- a/lib/Exceptions/InvalidRequestException.php
+++ b/lib/Exceptions/InvalidRequestException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class InvalidRequestException extends AppException{
+	/** @var string $message */
 	protected $message = 'Invalid HTTP request.';
 }
diff --git a/lib/Exceptions/InvalidUrlException.php b/lib/Exceptions/InvalidUrlException.php
index 87a27a0d..a44bc49a 100644
--- a/lib/Exceptions/InvalidUrlException.php
+++ b/lib/Exceptions/InvalidUrlException.php
@@ -2,6 +2,7 @@
 namespace Exceptions;
 
 class InvalidUrlException extends AppException{
+	/** @var string $message */
 	protected $message = 'Invalid URL.';
 
 	public function __construct(?string $url = null){
diff --git a/lib/Exceptions/MissingEbookException.php b/lib/Exceptions/MissingEbookException.php
index b232f252..35308c32 100644
--- a/lib/Exceptions/MissingEbookException.php
+++ b/lib/Exceptions/MissingEbookException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class MissingEbookException extends AppException{
+	/** @var string $message */
 	protected $message = 'Artwork marked as “in use”, but the ebook couldn’t be found in the filesystem.';
 }
diff --git a/lib/Exceptions/MissingPdProofException.php b/lib/Exceptions/MissingPdProofException.php
index bb07196e..71eaf834 100644
--- a/lib/Exceptions/MissingPdProofException.php
+++ b/lib/Exceptions/MissingPdProofException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class MissingPdProofException extends AppException{
+	/** @var string $message */
 	protected $message = 'Missing proof of U.S. public domain status.';
 }
diff --git a/lib/Exceptions/MuseumNotFoundException.php b/lib/Exceptions/MuseumNotFoundException.php
index 118eecca..f4b2ba8f 100644
--- a/lib/Exceptions/MuseumNotFoundException.php
+++ b/lib/Exceptions/MuseumNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class MuseumNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that museum.';
 }
diff --git a/lib/Exceptions/NewsletterRequiredException.php b/lib/Exceptions/NewsletterRequiredException.php
index 53a00532..2748b36f 100644
--- a/lib/Exceptions/NewsletterRequiredException.php
+++ b/lib/Exceptions/NewsletterRequiredException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class NewsletterRequiredException extends AppException{
+	/** @var string $message */
 	protected $message = 'You must select at least one newsletter to subscribe to.';
 }
diff --git a/lib/Exceptions/NewsletterSubscriptionExistsException.php b/lib/Exceptions/NewsletterSubscriptionExistsException.php
index edf0274c..733d30b1 100644
--- a/lib/Exceptions/NewsletterSubscriptionExistsException.php
+++ b/lib/Exceptions/NewsletterSubscriptionExistsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class NewsletterSubscriptionExistsException extends AppException{
+	/** @var string $message */
 	protected $message = 'You’re already subscribed to the newsletter.';
 }
diff --git a/lib/Exceptions/NewsletterSubscriptionNotFoundException.php b/lib/Exceptions/NewsletterSubscriptionNotFoundException.php
index fde14f8c..f3197e8d 100644
--- a/lib/Exceptions/NewsletterSubscriptionNotFoundException.php
+++ b/lib/Exceptions/NewsletterSubscriptionNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class NewsletterSubscriptionNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t find you in our newsletter subscribers list.';
 }
diff --git a/lib/Exceptions/PatronNotFoundException.php b/lib/Exceptions/PatronNotFoundException.php
index cbc6c606..cecbac02 100644
--- a/lib/Exceptions/PatronNotFoundException.php
+++ b/lib/Exceptions/PatronNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PatronNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate you in the Patrons Circle.';
 }
diff --git a/lib/Exceptions/PaymentExistsException.php b/lib/Exceptions/PaymentExistsException.php
index cb715cb3..4eb9fc76 100644
--- a/lib/Exceptions/PaymentExistsException.php
+++ b/lib/Exceptions/PaymentExistsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PaymentExistsException extends AppException{
+	/** @var string $message */
 	protected $message = 'This transaction ID already exists.';
 }
diff --git a/lib/Exceptions/PollClosedException.php b/lib/Exceptions/PollClosedException.php
index f3a13f98..3d55bb9d 100644
--- a/lib/Exceptions/PollClosedException.php
+++ b/lib/Exceptions/PollClosedException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PollClosedException extends AppException{
+	/** @var string $message */
 	protected $message = 'This poll is not open to voting right now.';
 }
diff --git a/lib/Exceptions/PollItemNotFoundException.php b/lib/Exceptions/PollItemNotFoundException.php
index 87e6d722..2ea58ef1 100644
--- a/lib/Exceptions/PollItemNotFoundException.php
+++ b/lib/Exceptions/PollItemNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PollItemNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that poll item.';
 }
diff --git a/lib/Exceptions/PollItemRequiredException.php b/lib/Exceptions/PollItemRequiredException.php
index a5dbff60..a62a6cf5 100644
--- a/lib/Exceptions/PollItemRequiredException.php
+++ b/lib/Exceptions/PollItemRequiredException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PollItemRequiredException extends AppException{
+	/** @var string $message */
 	protected $message = 'You must select an item to vote on.';
 }
diff --git a/lib/Exceptions/PollNotFoundException.php b/lib/Exceptions/PollNotFoundException.php
index 7fc26b44..f50e4bcf 100644
--- a/lib/Exceptions/PollNotFoundException.php
+++ b/lib/Exceptions/PollNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PollNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that poll.';
 }
diff --git a/lib/Exceptions/PollVoteExistsException.php b/lib/Exceptions/PollVoteExistsException.php
index 7869c5d2..5c213c3f 100644
--- a/lib/Exceptions/PollVoteExistsException.php
+++ b/lib/Exceptions/PollVoteExistsException.php
@@ -2,7 +2,8 @@
 namespace Exceptions;
 
 class PollVoteExistsException extends AppException{
-	public $Vote = null;
+	public ?\PollVote $Vote = null;
+	/** @var string $message */
 	protected $message = 'You’ve already voted in this poll.';
 
 	public function __construct(?\PollVote $vote = null){
diff --git a/lib/Exceptions/PollVoteNotFoundException.php b/lib/Exceptions/PollVoteNotFoundException.php
index a5bf261f..a71b3cdf 100644
--- a/lib/Exceptions/PollVoteNotFoundException.php
+++ b/lib/Exceptions/PollVoteNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class PollVoteNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that vote.';
 }
diff --git a/lib/Exceptions/TagsRequiredException.php b/lib/Exceptions/TagsRequiredException.php
index 42db4db1..9c477c9f 100644
--- a/lib/Exceptions/TagsRequiredException.php
+++ b/lib/Exceptions/TagsRequiredException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class TagsRequiredException extends AppException{
+	/** @var string $message */
 	protected $message = 'At least one tag is required.';
 }
diff --git a/lib/Exceptions/TooManyTagsException.php b/lib/Exceptions/TooManyTagsException.php
index c1561ffc..c7d7424a 100644
--- a/lib/Exceptions/TooManyTagsException.php
+++ b/lib/Exceptions/TooManyTagsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class TooManyTagsException extends AppException{
+	/** @var string $message */
 	protected $message = 'Too many tags; the maximum is ' . ARTWORK_MAX_TAGS . '.';
 }
diff --git a/lib/Exceptions/UserExistsException.php b/lib/Exceptions/UserExistsException.php
index ad89f6ef..1b077b2b 100644
--- a/lib/Exceptions/UserExistsException.php
+++ b/lib/Exceptions/UserExistsException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class UserExistsException extends AppException{
+	/** @var string $message */
 	protected $message = 'This email already exists in the database.';
 }
diff --git a/lib/Exceptions/UserNotFoundException.php b/lib/Exceptions/UserNotFoundException.php
index 8b6c8731..c91b338b 100644
--- a/lib/Exceptions/UserNotFoundException.php
+++ b/lib/Exceptions/UserNotFoundException.php
@@ -2,5 +2,6 @@
 namespace Exceptions;
 
 class UserNotFoundException extends AppException{
+	/** @var string $message */
 	protected $message = 'We couldn’t locate that user.';
 }
diff --git a/lib/Exceptions/ValidationException.php b/lib/Exceptions/ValidationException.php
index 2500f108..8321b2aa 100644
--- a/lib/Exceptions/ValidationException.php
+++ b/lib/Exceptions/ValidationException.php
@@ -1,10 +1,8 @@
 <?
 namespace Exceptions;
 
-/**
-  * @property array<\Exception> $Exceptions
- */
 class ValidationException extends AppException{
+	/** @var array<\Exception> $Exceptions */
 	public $Exceptions = [];
 	public bool $HasExceptions = false;
 	public bool $IsFatal = false;
diff --git a/lib/Exceptions/WebhookException.php b/lib/Exceptions/WebhookException.php
index 3ad9f057..ed7ef92d 100644
--- a/lib/Exceptions/WebhookException.php
+++ b/lib/Exceptions/WebhookException.php
@@ -2,7 +2,7 @@
 namespace Exceptions;
 
 class WebhookException extends AppException{
-	public $PostData;
+	public ?string $PostData;
 
 	public function __construct(string $message = '', string $data = null){
 		$this->PostData = $data;
diff --git a/lib/Feed.php b/lib/Feed.php
index 063c7633..156e9e7f 100644
--- a/lib/Feed.php
+++ b/lib/Feed.php
@@ -5,12 +5,10 @@ use function Safe\file_put_contents;
 use function Safe\tempnam;
 use function Safe\unlink;
 
-/**
- * @param array<string> $Entries
- */
 class Feed{
 	public string $Url;
 	public string $Title;
+	/** @var array<Ebook|OpdsNavigationEntry> $Entries */
 	public $Entries = [];
 	public string $Path;
 	public ?string $Stylesheet = null;
@@ -20,7 +18,7 @@ class Feed{
 	 * @param string $title
 	 * @param string $url
 	 * @param string $path
-	 * @param array<Ebook> $entries
+	 * @param array<Ebook|OpdsNavigationEntry> $entries
 	 */
 	public function __construct(string $title, string $url, string $path, array $entries){
 		$this->Url = $url;
diff --git a/lib/Image.php b/lib/Image.php
index fee13f0c..bf33dd91 100644
--- a/lib/Image.php
+++ b/lib/Image.php
@@ -1,8 +1,4 @@
 <?
-
-use Safe\Exceptions\ImageException;
-use Exceptions\InvalidImageUploadException;
-
 use function Safe\exec;
 use function Safe\imagecopyresampled;
 use function Safe\imagecreatetruecolor;
diff --git a/lib/Library.php b/lib/Library.php
index d09ac04a..36d2bd28 100644
--- a/lib/Library.php
+++ b/lib/Library.php
@@ -1,14 +1,5 @@
 <?
-
-use Exceptions\AppException;
-use Exceptions\ArtistNotFoundException;
 use Safe\DateTimeImmutable;
-use Safe\Exceptions\ExecException;
-use Safe\Exceptions\PcreException;
-use Safe\Exceptions\FilesystemException;
-use Safe\Exceptions\DatetimeException;
-use Safe\Exceptions\ArrayException;
-use Safe\Exceptions\MiscException;
 
 use function Safe\apcu_fetch;
 use function Safe\exec;
@@ -24,13 +15,11 @@ use function Safe\usort;
 
 class Library{
 	/**
-	* @param string $query
 	* @param array<string> $tags
-	* @param EbookSort $sort
 	* @return array<Ebook>
 	* @throws Exceptions\AppException
 	*/
-	public static function FilterEbooks(string $query = null, array $tags = [], EbookSort $sort = null){
+	public static function FilterEbooks(string $query = null, array $tags = [], EbookSort $sort = null): array{
 		$ebooks = Library::GetEbooks();
 		$matches = $ebooks;
 
diff --git a/lib/Museum.php b/lib/Museum.php
index 8dbb5902..248022b7 100644
--- a/lib/Museum.php
+++ b/lib/Museum.php
@@ -1,10 +1,4 @@
 <?
-
-use Exceptions\InvalidUrlException;
-use Safe\Exceptions\PcreException;
-use Exceptions\InvalidMuseumUrlException;
-use Exceptions\InvalidPageScanUrlException;
-
 use function Safe\parse_url;
 use function Safe\preg_match;
 use function Safe\preg_replace;
diff --git a/lib/NewsletterSubscription.php b/lib/NewsletterSubscription.php
index 5ec73947..762aa2aa 100644
--- a/lib/NewsletterSubscription.php
+++ b/lib/NewsletterSubscription.php
@@ -1,9 +1,5 @@
 <?
-
-use Exceptions\InvalidNewsletterSubscription;
-use Exceptions\NewsletterSubscriptionExistsException;
 use Safe\DateTimeImmutable;
-use Safe\Exceptions\ErrorfuncException;
 
 /**
  * @property User $User
@@ -17,8 +13,8 @@ class NewsletterSubscription{
 	public bool $IsSubscribedToNewsletter = false;
 	public ?int $UserId = null;
 	public DateTimeImmutable $Created;
-	protected $_User;
-	protected $_Url = null;
+	protected ?User $_User = null;
+	protected ?string $_Url = null;
 
 	// *******
 	// GETTERS
diff --git a/lib/OpdsFeed.php b/lib/OpdsFeed.php
index 00dda257..7a22cafe 100644
--- a/lib/OpdsFeed.php
+++ b/lib/OpdsFeed.php
@@ -10,7 +10,7 @@ class OpdsFeed extends AtomFeed{
 	 * @param string $subtitle
 	 * @param string $url
 	 * @param string $path
-	 * @param array<Ebook> $entries
+	 * @param array<Ebook|OpdsNavigationEntry> $entries
 	 * @param OpdsNavigationFeed $parent
 	 */
 	public function __construct(string $title, string $subtitle, string $url, string $path, array $entries, ?OpdsNavigationFeed $parent){
diff --git a/lib/OpdsNavigationFeed.php b/lib/OpdsNavigationFeed.php
index 894e8417..03aec048 100644
--- a/lib/OpdsNavigationFeed.php
+++ b/lib/OpdsNavigationFeed.php
@@ -4,12 +4,7 @@ use function Safe\file_get_contents;
 
 class OpdsNavigationFeed extends OpdsFeed{
 	/**
-	 * @param string $title
-	 * @param string $subtitle
-	 * @param string $url
-	 * @param string $path
-	 * @param array<Ebook> $entries
-	 * @param OpdsNavigationFeed $parent
+	 * @param array<OpdsNavigationEntry> $entries
 	 */
 	public function __construct(string $title, string $subtitle, string $url, string $path, array $entries, ?OpdsNavigationFeed $parent){
 		parent::__construct($title, $subtitle, $url, $path, $entries, $parent);
@@ -24,6 +19,7 @@ class OpdsNavigationFeed extends OpdsFeed{
 				$xml = new SimpleXMLElement(str_replace('xmlns=', 'ns=', file_get_contents($this->Path)));
 				foreach($xml->xpath('//entry') ?: [] as $existingEntry){
 					foreach($this->Entries as $entry){
+						/** @var OpdsNavigationEntry $entry */
 						if($entry->Id == $existingEntry->id){
 							$entry->Updated = new DateTimeImmutable($existingEntry->updated);
 						}
diff --git a/lib/Patron.php b/lib/Patron.php
index 81501089..f860798a 100644
--- a/lib/Patron.php
+++ b/lib/Patron.php
@@ -8,13 +8,13 @@ class Patron{
 	use Traits\Accessor;
 
 	public ?int $UserId = null;
-	protected $_User = null;
 	public bool $IsAnonymous;
 	public ?string $AlternateName = null;
 	public bool $IsSubscribedToEmails;
 	public ?DateTimeImmutable $Created = null;
 	public ?DateTimeImmutable $Ended = null;
 
+	protected ?User $_User = null;
 
 	// *******
 	// METHODS
diff --git a/lib/Payment.php b/lib/Payment.php
index e8ac4e81..a1843def 100644
--- a/lib/Payment.php
+++ b/lib/Payment.php
@@ -1,7 +1,4 @@
 <?
-
-use Exceptions\UserExistsException;
-use Exceptions\PaymentExistsException;
 use Safe\DateTimeImmutable;
 
 /**
@@ -19,6 +16,7 @@ class Payment{
 	public float $Fee;
 	public bool $IsRecurring;
 	public bool $IsMatchingDonation = false;
+
 	protected ?User $_User = null;
 
 
diff --git a/lib/Poll.php b/lib/Poll.php
index de4c8bc4..4da92f86 100644
--- a/lib/Poll.php
+++ b/lib/Poll.php
@@ -3,8 +3,6 @@ use Safe\DateTimeImmutable;
 use function Safe\usort;
 
 /**
- * @property ?array<PollItem> $_PollItems
- * @property ?array<PollItem> $_PollItemsByWinner
  * @property string $Url
  * @property array<PollItem> $PollItems
  * @property array<PollItem> $PollItemsByWinner
@@ -21,7 +19,9 @@ class Poll{
 	public DateTimeImmutable $Start;
 	public DateTimeImmutable $End;
 	protected ?string $_Url = null;
+	/** @var ?array<PollItem> $_PollItems */
 	protected $_PollItems = null;
+	/** @var ?array<PollItem> $_PollItemsByWinner */
 	protected $_PollItemsByWinner = null;
 	protected ?int $_VoteCount = null;
 
diff --git a/lib/PollVote.php b/lib/PollVote.php
index 2dbf3fe1..300a258d 100644
--- a/lib/PollVote.php
+++ b/lib/PollVote.php
@@ -1,6 +1,4 @@
 <?
-
-use Exceptions\InvalidPollVoteException;
 use Safe\DateTimeImmutable;
 
 /**
@@ -14,6 +12,7 @@ class PollVote{
 	public ?int $UserId = null;
 	public DateTimeImmutable $Created;
 	public ?int $PollItemId = null;
+
 	protected ?User $_User = null;
 	protected ?PollItem $_PollItem = null;
 	protected ?string $_Url = null;
diff --git a/lib/RssFeed.php b/lib/RssFeed.php
index 039289d1..fa4179d7 100644
--- a/lib/RssFeed.php
+++ b/lib/RssFeed.php
@@ -1,8 +1,5 @@
 <?
 use Safe\DateTimeImmutable;
-use Safe\Exceptions\DatetimeException;
-use Safe\Exceptions\FilesystemException;
-use Safe\Exceptions\ExecException;
 
 use function Safe\file_get_contents;
 use function Safe\filesize;
@@ -12,10 +9,6 @@ class RssFeed extends Feed{
 	public string $Description;
 
 	/**
-	 * @param string $title
-	 * @param string $description
-	 * @param string $url
-	 * @param string $path
 	 * @param array<Ebook> $entries
 	 */
 	public function __construct(string $title, string $description, string $url, string $path, array $entries){
@@ -65,6 +58,7 @@ class RssFeed extends Feed{
 
 		$currentEntries = [];
 		foreach($this->Entries as $entry){
+			/** @var Ebook $entry */
 			$obj = new StdClass();
 			$obj->Size = (string)filesize(WEB_ROOT . $entry->EpubUrl);
 			$obj->Id = preg_replace('/^url:/ius', '', $entry->Identifier);
diff --git a/lib/Session.php b/lib/Session.php
index 981fb604..5bbe9912 100644
--- a/lib/Session.php
+++ b/lib/Session.php
@@ -15,9 +15,10 @@ class Session{
 	use Traits\Accessor;
 
 	public int $UserId;
-	protected ?User $_User = null;
 	public DateTimeImmutable $Created;
 	public string $SessionId;
+
+	protected ?User $_User = null;
 	public ?string $_Url = null;
 
 
diff --git a/lib/Template.php b/lib/Template.php
index 899dbaa7..2bb58312 100644
--- a/lib/Template.php
+++ b/lib/Template.php
@@ -4,7 +4,6 @@ use function Safe\ob_start;
 
 class Template{
 	/**
-	* @param string $templateName
 	* @param array<mixed> $arguments
 	*/
 	protected static function Get(string $templateName, array $arguments = []): string{
@@ -23,7 +22,6 @@ class Template{
 	}
 
 	/**
-	* @param string $function
 	* @param array<mixed> $arguments
 	*/
 	public static function __callStatic(string $function, array $arguments): string{
diff --git a/lib/User.php b/lib/User.php
index 2c6f21b2..e693849c 100644
--- a/lib/User.php
+++ b/lib/User.php
@@ -1,16 +1,15 @@
 <?
-
 use Exceptions\UserExistsException;
 use Ramsey\Uuid\Uuid;
 use Safe\DateTimeImmutable;
 
 /**
  * @property array<Payment> $Payments
- * @property ?bool $IsRegistered
+ * @property bool $IsRegistered
  * @property Benefits $Benefits
- * @property ?array<Payment> $_Payments
  */
 class User{
+
 	use Traits\Accessor;
 
 	public int $UserId;
@@ -19,7 +18,9 @@ class User{
 	public DateTimeImmutable $Created;
 	public string $Uuid;
 	public ?string $PasswordHash = null;
+
 	protected ?bool $_IsRegistered = null;
+	/** @var ?array<Payment> $_Payments */
 	protected $_Payments = null;
 	protected ?Benefits $_Benefits = null;