[英]Serialize/Unserialize database data?
是否可以序列化表單發布的數據,然后將其插入數據庫,然后如果需要更新,請對其進行反序列化,然后僅更新已更改的數據?
如果有可能,有人會友好地提供/編寫一個小腳本來執行此操作嗎?
要直接回答您的問題,您需要做的就是:
$data = serialize($_POST);
$sql = "INSERT INTO `table` (`data`) VALUES ('".addslashes($data)."')";
...
但是,我強烈建議您不要序列化數據並將其放入數據庫。 這將使數據非常難以搜索,更新等。您將不得不依靠應用程序來維護數據的完整性!
我建議您設計一個適合您表格結構的數據庫表...如果您的表格結構是動態的,那么您將需要創建多個表來存儲數據。
這是從序列化數據中提取單個字符串值的函數...
用法就像...
SELECT PARSE_PHP_SERIALIZED_DATA_STRING(
`serialized_data`, 'EmailAddress'
)
FROM `your_table`
WHERE `serialized_data` LIKE '%EmailAddress%'
這是功能:
DELIMITER $$
--
-- Functions
--
DROP FUNCTION IF EXISTS `PARSE_PHP_SERIALIZED_DATA_STRING`$$
CREATE FUNCTION `PARSE_PHP_SERIALIZED_DATA_STRING`(str_data BLOB, str_index VARCHAR(252)) RETURNS varchar(255)
DETERMINISTIC
BEGIN
-- Declare variables must be done at top of BEGIN END
DECLARE start_pos INT;
DECLARE string_out VARCHAR(255);
DECLARE string_search VARCHAR(255);
DECLARE quote_string VARCHAR(6);
-- The indexes in a php serialized string are quoted and end with a semi-colon
-- Setting the quote string incase the "developer" before you (who thought
-- it was a good idea to dump serialized data in to a single column) then also
-- randomly html encoded the string every third row.
SET quote_string = '"';
SET string_search = CONCAT(quote_string, str_index, quote_string, ';');
-- search for the index
SET start_pos = LOCATE(string_search, str_data);
IF start_pos = 0 THEN
-- not found it so lets search again but with html entities
SET quote_string = '"';
SET string_search = CONCAT(quote_string, str_index, quote_string, ';');
SET start_pos = LOCATE(string_search, str_data);
END IF;
-- still not found it, then it is not there as an index
IF start_pos = 0 THEN RETURN '';
END IF;
-- cut up the string to get just the value
-- the offsets here work for string values
-- maybe a different function for integer values??
SET start_pos = start_pos + LENGTH(string_search);
SET string_out = SUBSTRING(str_data, start_pos,255);
IF SUBSTRING(string_out,1,2) = 'N;' THEN
RETURN '';
END IF;
SET string_out = SUBSTRING(string_out, LOCATE(quote_string,string_out)+LENGTH(quote_string), LOCATE(quote_string,string_out,LOCATE(quote_string,string_out)+1));
SET string_out = SUBSTRING(string_out, 1,LOCATE(quote_string,string_out)-1);
RETURN string_out;
END$$
DELIMITER ;
是的,你可以做到這一點,但不清楚為什么你會想要/需要。 一旦序列化的數據進入數據庫中,就很難/不可能進行查詢,並且要對其進行更新,您將不得不從數據庫中提取數據,反序列化,更新,序列化並更新適當的行。
您可以使用JSON對POSTDATA進行編碼並存儲在數據庫中。 當您需要數據時,只需解碼JSON即可。
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