fuel/fuel/core/classes/validation.php
public function _validation_exact_length($val, $length)
	{
		return $this->_empty($val) || \Str::length($val) == $length;
	}
public function _validation_exact_length($val, $length)
	{
		return $this->_empty($val) || \Str::length($val) == $length;
	}
public function _validation_exact_length ( $ val , $ length ) { return $ this -> _empty ( $ val ) || \ Str :: length ( $ val ) == $ length ; }
Exact string length

@param   string
@param   int
@return  bool
Exact string length