Fixed some issues detected by PHPstan.

src/Command/CleanAttachmentsCommand.php

@@ -65,7 +65,7 @@ class CleanAttachmentsCommand extends Command
                 ' These files are not needed and can eventually deleted.');
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output): void
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);
 
@@ -107,7 +107,7 @@ class CleanAttachmentsCommand extends Command
 
             if (! $continue) {
                 //We are finished here, when no files should be deleted
-                return;
+                return 0;
             }
 
             //Delete the files
@@ -119,6 +119,8 @@ class CleanAttachmentsCommand extends Command
         } else {
             $io->success('No abandoned files found.');
         }
+
+        return 0;
     }
 
     /**

src/Command/ConvertBBCodeCommand.php

@@ -105,7 +105,7 @@ class ConvertBBCodeCommand extends Command
         ];
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output): void
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);
         $targets = $this->getTargetsLists();
@@ -168,5 +168,7 @@ class ConvertBBCodeCommand extends Command
             $this->em->flush();
             $io->success('Changes saved to DB successfully!');
         }
+
+        return 0;
     }
 }

src/Command/SetPasswordCommand.php

@@ -57,19 +57,19 @@ class SetPasswordCommand extends Command
         ;
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output): void
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);
         $user_name = $input->getArgument('user');
 
-        /** @var User */
+        /** @var User[] $users */
         $users = $this->entityManager->getRepository(User::class)->findBy(['name' => $user_name]);
         $user = $users[0];
 
         if (null === $user) {
             $io->error(sprintf('No user with the given username %s found in the database!', $user_name));
 
-            return;
+            return 1;
         }
 
         $io->note('User found!');
@@ -79,7 +79,7 @@ class SetPasswordCommand extends Command
                 $user->getFullName(true), $user->getID()));
 
         if (! $proceed) {
-            return;
+            return 1;
         }
 
         $success = false;
@@ -106,5 +106,6 @@ class SetPasswordCommand extends Command
         $this->entityManager->flush();
 
         $io->success('Password was set successful! You can now log in using the new password.');
+        return 0;
     }
 }

src/Command/ShowEventLogCommand.php

@@ -64,13 +64,13 @@ class ShowEventLogCommand extends Command
 
         $onePage = $input->getOption('onePage');
 
-        $desc = $input->getOption('oldest_first');
-        $limit = $input->getOption('count');
-        $page = $input->getOption('page');
+        $desc = (bool) $input->getOption('oldest_first');
+        $limit = (int) $input->getOption('count');
+        $page = (int) $input->getOption('page');
         $showExtra = $input->getOption('showExtra');
 
         $total_count = $this->repo->count([]);
-        $max_page = ceil($total_count / $limit);
+        $max_page = (int) ceil($total_count / $limit);
 
         if ($page > $max_page) {
             $io->error("There is no page ${page}! The maximum page is ${max_page}.");

src/Command/UpdateExchangeRatesCommand.php

@@ -68,7 +68,7 @@ class UpdateExchangeRatesCommand extends Command
                 null);
     }
 
-    protected function execute(InputInterface $input, OutputInterface $output): void
+    protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $io = new SymfonyStyle($input, $output);
 
@@ -76,7 +76,7 @@ class UpdateExchangeRatesCommand extends Command
         if (3 !== strlen($this->base_current)) {
             $io->error('Choosen Base current is not valid. Check your settings!');
 
-            return;
+            return 1;
         }
 
         $io->note('Update currency exchange rates with base currency: '.$this->base_current);
@@ -121,5 +121,6 @@ class UpdateExchangeRatesCommand extends Command
         $this->em->flush();
 
         $io->success(sprintf('%d (of %d) currency exchange rates were updated.', $success_counter, count($candidates)));
+        return 0;
     }
 }