mysql mystery call

[Anstice]

Hi guys, the following code makes a call to a
preg_replace function that I cant seem to find on the db.



CREATE DEFINER=`root`@`localhost` FUNCTION `makehash`(description text, raw_location text, title text) RETURNS varchar(32) CHARSET utf8
NO SQL
DETERMINISTIC
begin
declare data longtext;
declare hash varchar(32);
set data = ifnull(description, '');
set hash = null;
if length(data) > 64 then
set data = lower(concat(data, ifnull(raw_location, ''), ifnull(title, '')));
set hash = md5(preg_replace('/[^a-z]/', '', data));
end if;
return hash;
end


Basically, I have two dbs and am moving from one to the other. I almost there apart from this last thing prevents things from running.

I have run
show procedure status and
show function status but can't see this anywhere.

Are there another mysql constructs like functions and procedures that can be called like this that I may have missed?

[Some Penguin]

Regular expression handling. Not a MySQL guru, but that line will set 'hash' to be the MD5 checksum of a modified version of 'data' where everything -except- lower-case letters (*) has been removed.


(*) specifically, a-z; I suspect that something like é would be removed because it is not within that set. Encoding issues, oh joy!

[Anstice]

Thanks for the reply. I am aware of what the function is trying to but I cant find it in the table I copied the other function from even though everything runs fine on it.

[Some Penguin]

Turns out its a PHP function.

http://php.net/manual/en/function.preg-replace.php