Re: Checking database for a value

On Sunday 21 April 2002 01:10, Jason Wong wrote: > On Sunday 21 April 2002 00:55, Denis L. Menezes wrote: > > hello friends, > > > > I am looking into 4 books in front of me but somehow cannot find the > > following : > > > > I have a field userid which the user fills in at registration. Before > > entering the data into the database, I want to check if the userid exists > > in the database. > > > > Can someone tell me the name of the function I must use, I will look for > > the rest in the php dictionary. > > AFAIK there are no built-in functions to do that. You need to run a query > like "SELECT userid FROM table" then see whether any rows are returned. If > you use this often you can wrap it up in a function. That of course should be: "SELECT userid FROM table WHERE userid='user_id_to_check'" I better get some sleep :) -- Jason Wong -> Gremlins Associates -> www.gremlins.com.hk Open Source Software Systems Integrators * Web Design & Hosting * Internet & Intranet Applications Development * /* Delta: We never make the same mistake three times. -- David Letterman */