Merge pull request zendframework/zendframework#2135 from Thinkscape/h…

…otfix/callable-not-callback

Change all 'callback' typehints to 'callable'

src/Callback.php

@@ -92,8 +92,8 @@ public function getCallbackParams()
     /**
      * Calls the filter per callback
      *
-     * @param  mixed $value Options for the set callback
-     * @return mixed Result from the filter which was callbacked
+     * @param  mixed $value Options for the set callable
+     * @return mixed Result from the filter which was called
      */
     public function filter($value)
     {

src/FilterChain.php

@@ -139,7 +139,7 @@ public function plugin($name, array $options = array())
     /**
      * Attach a filter to the chain
      *
-     * @param  callback|FilterInterface $callback A Filter implementation or valid PHP callback
+     * @param  callable|FilterInterface $callback A Filter implementation or valid PHP callback
      * @param  int $priority Priority at which to enqueue filter; defaults to 1000 (higher executes earlier)
      * @return FilterChain
      */