What is the MySQL query equivalent of PHP strip_tags?

Question

I have a large database which contains records that have tags in them and I would like to remove them. Of course there is the method where I create a

Answer 1

I'm using the lib_mysqludf_preg library for this and a regex like this:

SELECT PREG_REPLACE('#<[^>]+>#',' ',cell) FROM table;

Also did it like this for rows which with encoded html entities:

SELECT PREG_REPLACE('#<.+?>#',' ',cell) FROM table;

There are probably cases where these might fail but I haven't encountered any and they're reasonably fast.

Answer 2

I am passing this code on, seems very similar to the above. Worked for me, hope it helps.

BEGIN
  DECLARE iStart, iEnd, iLength   INT;

  WHILE locate('<', Dirty) > 0 AND locate('>', Dirty, locate('<', Dirty)) > 0
  DO
    BEGIN
      SET iStart = locate('<', Dirty), iEnd = locate('>', Dirty, locate('<', Dirty));
      SET iLength = (iEnd - iStart) + 1;
      IF iLength > 0 THEN
        BEGIN
          SET Dirty = insert(Dirty, iStart, iLength, '');
        END;
      END IF;
    END;
  END WHILE;
  RETURN Dirty;
END

Answer 3

REPLACE() works pretty well.

The subtle approach:

 REPLACE(REPLACE(node.body,'<p>',''),'</p>','') as `post_content`

...and the not so subtle: (Converting strings into slugs)

 LOWER(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(TRIM(node.title), ':', ''), 'é', 'e'), ')', ''), '(', ''), ',', ''), '\\', ''), '\/', ''), '\"', ''), '?', ''), '\'', ''), '&', ''), '!', ''), '.', ''), '–', ''), ' ', '-'), '--', '-'), '--', '-'), '’', '')) as `post_name`