src/sb/Excel/Workbook.php
protected function getValueType($val)
    {
        $type = 'String';
        if ($this->auto_convert_types === true && is_numeric($val)) {
            $type = 'Number';
        }

        return $type;
    }
protected function getValueType($val)
    {
        $type = 'String';
        if ($this->auto_convert_types === true && is_numeric($val)) {
            $type = 'Number';
        }

        return $type;
    }
protected function getValueType ( $ val ) { $ type = 'String' ; if ( $ this -> auto_convert_types === true && is_numeric ( $ val ) ) { $ type = 'Number' ; } return $ type ; }
Determines value type
@param string $val
@return string
Determines value type