protected function assertMethod($method)
    {
        if (!is_string($method)) {
            $type = (is_object($method) ? get_class($method) . ' ' : '') . gettype($method);
            throw new \InvalidArgumentException("Method should be a string, not a $type");
        }
        
        if (preg_match('/[^a-z\-]/i', $method)) {
            $type = (is_object($method) ? get_class($method) . ' ' : '') . gettype($method);
            throw new \InvalidArgumentException("Invalid method '$method': "
                . "Method may only contain letters and dashes");
        }
    }
protected function assertMethod($method)
    {
        if (!is_string($method)) {
            $type = (is_object($method) ? get_class($method) . ' ' : '') . gettype($method);
            throw new \InvalidArgumentException("Method should be a string, not a $type");
        }
        
        if (preg_match('/[^a-z\-]/i', $method)) {
            $type = (is_object($method) ? get_class($method) . ' ' : '') . gettype($method);
            throw new \InvalidArgumentException("Invalid method '$method': "
                . "Method may only contain letters and dashes");
        }
    }
protected function assertMethod ( $ method ) { if ( ! is_string ( $ method ) ) { $ type = ( is_object ( $ method ) ? get_class ( $ method ) . ' ' : '' ) . gettype ( $ method ) ; throw new \ InvalidArgumentException ( "Method should be a string, not a $type" ) ; } if ( preg_match ( '/[^a-z\-]/i' , $ method ) ) { $ type = ( is_object ( $ method ) ? get_class ( $ method ) . ' ' : '' ) . gettype ( $ method ) ; throw new \ InvalidArgumentException ( "Invalid method '$method': " . "Method may only contain letters and dashes" ) ; } }
Assert method is valid

@param string $method
@throws \InvalidArgumentException
Assert method is valid