Zephir\Utils::camelize PHP Method

    public static function camelize($str)
    {
        return str_replace(' ', '', ucwords(str_replace('_', ' ', $str)));
    }

 /**
  * Tries to find specific an specialized optimizer for function calls
  *
  * @param string $funcName
  * @param array $expression
  * @param Call $call
  * @param CompilationContext $compilationContext
  */
 protected function optimize($funcName, array $expression, Call $call, CompilationContext $compilationContext)
 {
     $optimizer = false;
     /**
      * Check if the optimizer is already cached
      */
     if (!isset(self::$_optimizers[$funcName])) {
         $camelizeFunctionName = Utils::camelize($funcName);
         /**
          * Check every optimizer directory for an optimizer
          */
         foreach (self::$_optimizerDirectories as $directory) {
             $path = $directory . DIRECTORY_SEPARATOR . $camelizeFunctionName . 'Optimizer.php';
             if (file_exists($path)) {
                 require_once $path;
                 $className = 'Zephir\\Optimizers\\FunctionCall\\' . $camelizeFunctionName . 'Optimizer';
                 if (!class_exists($className, false)) {
                     throw new \Exception('Class ' . $className . ' cannot be loaded');
                 }
                 $optimizer = new $className();
                 if (!$optimizer instanceof OptimizerAbstract) {
                     throw new \Exception('Class ' . $className . ' must be instance of OptimizerAbstract');
                 }
                 break;
             }
         }
         self::$_optimizers[$funcName] = $optimizer;
     } else {
         $optimizer = self::$_optimizers[$funcName];
     }
     if ($optimizer) {
         return $optimizer->optimize($expression, $call, $compilationContext);
     }
     return false;
 }