Changed private static array-properties to const

Author: simonberger

Command/ServerLogCommand.php

@@ -30,7 +30,7 @@
  */
 class ServerLogCommand extends Command
 {
-    private static $bgColor = ['black', 'blue', 'cyan', 'green', 'magenta', 'red', 'white', 'yellow'];
+    private const BG_COLOR = ['black', 'blue', 'cyan', 'green', 'magenta', 'red', 'white', 'yellow'];
 
     private $el;
     private $handler;
@@ -155,7 +155,7 @@ private function displayLog(OutputInterface $output, int $clientId, array $recor
         if (isset($record['log_id'])) {
             $clientId = unpack('H*', $record['log_id'])[1];
         }
-        $logBlock = sprintf('<bg=%s> </>', self::$bgColor[$clientId % 8]);
+        $logBlock = sprintf('<bg=%s> </>', self::BG_COLOR[$clientId % 8]);
         $output->write($logBlock);
 
         $this->handler->handle($record);