Form validation- one field or another

Anon

I have seen examples of form validation to check wether a field is present or not.

But I want to give the choice to search a MySQL database by Name, Town or postcode so I need to validate the submit form and check for either a name or town or a postcode but not allow all fields to be blank at once.

So any one or two fields to be blank is OK but never all three, although individually they can occasionally be blank- do you see what I mean?

I've searched but cannot find any example although I thought this must be a common requirement.

Any help or especially code examples will be greatly appreciated.

Anon

counter = 0
if (field1 !='')
{
counter++
}
if (field2 !='')
{
counter++
}
if (field3 !='')
{
counter++
}
if (counter < 1)
error ...

thats a JS Part, and i'm not too familiar with it ... so its a pseudo syntax ... but it should give you the idea ....

hope that helps
Rob

Anon

Thanks Rob

but I can't get it to work does anyone have any ideas about the syntax or a php script to do this?

Anon

Why not just check with an if?

if (empty($field1)&&empty(field2)&&empty($field3)) {

return FALSE;

}

Actually isset might be more correct.

Anon

hi thats to easy 🙂))
... but it'll work ... don't know what I was thinking of as i placed the example (something like 3 fields and at least 2 need to be filled ?!???!)...
thats the right one malcolm!! and its allready in the correct syntax (if you want PHP) ...

Anon

Yes, this one is working thanks a lot to everyone!

if (empty($field1)&&empty(field2)&&empty($field3)) {

return FALSE;

}

But one supplementary question if I may:

When it returns false whats the best way to return the form and ask for an input? I've tried tacking on a print command but the php file stops dead after the false (which is what I wanted it to do as otherwise it prints hundreds of results because the search is to wide).

Any ideas, thanks again
Malcolm

Anon

I've got it now HOOORAY!!

thanks for all your help!!