public function getEmptyValue()
	{
		if (!isset($GLOBALS['TL_DCA'][$this->strTable]['fields'][$this->strField]['sql']))
		{
			return '';
		}

		return static::getEmptyValueByFieldType($GLOBALS['TL_DCA'][$this->strTable]['fields'][$this->strField]['sql']);
	}
public function getEmptyValue()
	{
		if (!isset($GLOBALS['TL_DCA'][$this->strTable]['fields'][$this->strField]['sql']))
		{
			return '';
		}

		return static::getEmptyValueByFieldType($GLOBALS['TL_DCA'][$this->strTable]['fields'][$this->strField]['sql']);
	}
public function getEmptyValue ( ) { if ( ! isset ( $ GLOBALS [ 'TL_DCA' ] [ $ this -> strTable ] [ 'fields' ] [ $ this -> strField ] [ 'sql' ] ) ) { return '' ; } return static :: getEmptyValueByFieldType ( $ GLOBALS [ 'TL_DCA' ] [ $ this -> strTable ] [ 'fields' ] [ $ this -> strField ] [ 'sql' ] ) ; }
Return the empty value based on the SQL string

@return string|integer|null The empty value
Return the empty value based on the SQL string