> Lets say I wanted to check a bunch of fields to make sure they weren't
> empty. I can check one field by saying:
> if ($field1) {
> echo "Field 1 is not empty";
> }

I'd use empty() since certain values would cause your if to evalute to false

> Can't I just say:
> if ($field1 and $field2 and $field3 and $field4) {
> echo "All four fields are field in";
> }

Have you tried it?
Once again, I'd use empty()
if(!empty($field1) && !empty($field2) !empty($field3) !empty($field4)){
I like '&&', rather than 'and', but that's just me.

> if ($field1 or $field2 or $field3 or $field4) {
> echo "At least one of the four fields is filled in";
> }
See above but replace '&&' with '||' or 'or'

> Maybe its not the word "and" and "or" but maybe its && or ||
> respectively? That's what I've seen in other languages that let you do
> this. I'm sure there must be a way to do this with PHP, too.


Tha manual is your friend, it can answer a lot of your questions.  Once
again, I don't see what this has to do with databases.

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