Re: Warning: Undefined variable

We are confusing one another :) I'm not talking about declaring variables per se, but rather making sure the variable exists before evaluating it. So: $var = 'foobar'; if ($var == 'foobar') That's fine, no need to do declare $var before this in PHP. My words here simply mean to make sure it exists before comparing it. (let's not talk about oop) Your example of $var$i is fine, and will work without any errors (if I'm following). Btw, you should use arrays versus this method, arrays kick ass. Sure doing ${'foo'.$i} or similiar has its purpose but usually an array will do (please!). When in doubt, put error_reporting(E_ALL) on top of your script and go to town. Regards, Philip Olson On Tue, 2 Apr 2002, Erik Price wrote: > > On Tuesday, April 2, 2002, at 03:27 PM, Philip Olson wrote: > > > If you're distributing code in cyberspace it's a good > > idea to make it error free too, E_NOTICE or otherwise. > > I got back quite a few responses on this list on the subject of having > variables that are not defined before they are used. That's > interesting -- it's nice to know that I can take shortcuts and conjure > them up on the fly, but I didn't realize that it was good practice to > declare the variable before you actually use it in a script. (I never > studied programming in any formal sense, as anyone who has seen my > source code can attest :). > > Sometimes I create variables dynamically, such that I could never > declare/initialize them in any realistic sense -- for instance, I might > have a while loop that executes a number of times equal to the number of > rows pulled from a database query. And in this while loop, I might > generate a new variable (assigning it a name like $variable$i, using the > old $i++ trick to give it a unique numeric suffix). > > If I use this trick, does this doom me to never having fully-error-free > code? Or is there something that I'm not getting here... The short of > it is that, as a novice programmer, I'd like to make sure I'm writing > the most legitimate code that I can. Thanks for any input on this > thread, past or future. > > > Erik > > > > ---- > > Erik Price > Web Developer Temp > Media Lab, H.H. Brown > pricee@hhbrown.com >