Colin Guthrie wrote:
'Twas brillig, and Nathan Rixham at 10/01/09 23:31 did gyre and gimble:
all I need is a completely unique id for each object instance that can
never be repeated at any time, even in a multiserver environment (and
without using any kind of incremented value from a db table or third
party app)
thoughts, ideas, recommendations?
While it's not guaranteed to be unique the general technique used in
these situations is to use a UUID. The chances of a clash are slim
(2x10^38 ish combinations).
You can generate a uuid via mysql "SELECT UUID()" or via the PHP Pecl
extension php-uuid.
The other way of doing it would be to insert a row into a database row
with an auto-increment field and use the value of that auto-incrment
field as your identifier (SELECT LAST_INSERT_ID() in mysql or via the db
layers API).
HTHs
Col
cheers for the input; uuid it has to be I guess; don't want it reliant
on any third party software or db so pecl is out, as is mysql - looks
like I'm going to have to (and probably enjoy) making a uuid function to
generate type 4 random uuids.
only other thought is to combine all the instance variables, hash the
combination of them and save that together with a timestamp..
considering
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