MySQL url_decode – own function
Below is a MySQL function that decodes URLs encoded in PHP with the urlencode function. You must have root access to MySQL:
DELIMITER $$
DROP FUNCTION IF EXISTS `url_decode` $$
CREATE DEFINER=`root`@`localhost` FUNCTION `url_decode`(original_text TEXT) RETURNS TEXT CHARSET utf8
BEGIN
DECLARE new_text TEXT DEFAULT NULL;
DECLARE pointer INT DEFAULT 1;
DECLARE end_pointer INT DEFAULT 1;
DECLARE encoded_text TEXT DEFAULT NULL;
DECLARE result_text TEXT DEFAULT NULL;
SET new_text = REPLACE(original_text,'+',' ');
SET pointer = LOCATE("%", new_text);
while pointer <> 0 && pointer < (CHAR_LENGTH(new_text) - 2) DO
SET end_pointer = pointer + 3;
while MID(new_text, end_pointer, 1) = "%" DO
SET end_pointer = end_pointer+3;
END while;
SET encoded_text = MID(new_text, pointer, end_pointer - pointer);
SET result_text = CONVERT(UNHEX(REPLACE(encoded_text, "%", "")) USING utf8);
SET new_text = REPLACE(new_text, encoded_text, result_text);
SET pointer = LOCATE("%", new_text, pointer + CHAR_LENGTH(result_text));
END while;
return new_text;
END $$
DELIMITER ;And then just:
UPDATE `sometable` SET `url`= url_decode(`url`) WHERE 1… and done in SQL without writing PHP code 🙂
