Fix doc block for callback arg

Author: mbabker

.php_cs renamed to .php-cs-fixer.php

@@ -40,7 +40,7 @@ protected function getTid(string $name): string
 
     /**
      * @param int|float $timeout
-     * @param mixed     $callback
+     * @param callable  $callback
      */
     public function addPeriodicTimer(string $name, $timeout, $callback): void
     {
@@ -52,12 +52,12 @@ public function isPeriodicTimerActive(string $name): bool
         return isset($this->registry[$this->getTid($name)]);
     }
 
-    public function cancelPeriodicTimer(string $tidOrname): void
+    public function cancelPeriodicTimer(string $tidOrName): void
     {
-        if (!isset($this->registry[$tidOrname])) {
-            $tid = $this->getTid($tidOrname);
+        if (!isset($this->registry[$tidOrName])) {
+            $tid = $this->getTid($tidOrName);
         } else {
-            $tid = $tidOrname;
+            $tid = $tidOrName;
         }
 
         $timer = $this->registry[$tid];