swap create_function for anonymous functions

Author: martinamps

Services/Twilio/Resource.php

@@ -71,8 +71,9 @@ public function getResourceName($camelized = false)
 
     public static function decamelize($word)
     {
-        $callback = create_function('$matches',
-            'return strtolower(strlen("$matches[1]") ? "$matches[1]_$matches[2]" : "$matches[2]");');
+        $callback = function($m) {
+                return strtolower(strlen($m[1]) ? "$m[1]_$m[2]" : $m[2]);
+        };
 
         return preg_replace_callback(
             '/(^|[a-z])([A-Z])/',
@@ -90,7 +91,9 @@ public static function decamelize($word)
      * @return string
      */
     public static function camelize($word) {
-        $callback = create_function('$matches', 'return strtoupper("$matches[2]");');
+        $callback = function($m) {
+                return strtoupper($m[2]);
+        };
 
         return preg_replace_callback('/(^|_)([a-z])/',
             $callback,