PHPStan level 6 for all PDO and Exception classes (#5239)

* PHPStan level 6 for all PDO and Exception classes
Contributes to https://github.com/FreshRSS/FreshRSS/issues/4112

* Fix type

* Now also our remaining own librairies

* Motivation for a few more files

* A few more DAO classes

* Last interface

1 files changed, 4 insertions, 2 deletions

diff --git a/app/Exceptions/AlreadySubscribedException.php b/app/Exceptions/AlreadySubscribedException.php
index 33b9f9555..c2b11d3a0 100644
--- a/app/Exceptions/AlreadySubscribedException.php
+++ b/app/Exceptions/AlreadySubscribedException.php
@@ -1,14 +1,16 @@
 <?php
 
 class FreshRSS_AlreadySubscribed_Exception extends Exception {
+
+	/** @var string */
 	private $feedName = '';
 
-	public function __construct($url, $feedName) {
+	public function __construct(string $url, string $feedName) {
 		parent::__construct('Already subscribed! ' . $url, 2135);
 		$this->feedName = $feedName;
 	}
 
-	public function feedName() {
+	public function feedName(): string {
 		return $this->feedName;
 	}
 }