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Re: Not understanding HTML form [message #169433 is a reply to message #169430]

Sun, 12 September 2010 18:25

MikeB
Messages: 65
Registered: September 2010

Karma:

Member

On Sep 12, 1:17 pm, Marious Barrier <marious.barr...@gmail.com> wrote:
> On 09/12/2010 02:06 PM, MikeB wrote:
>
>> However, on a 3rd iteration, without typing anything into any field,
>> the isset still evaluates to true, although the $_POST variable for
>> "action' shows a null field. How can I then recognize that that field
>> is in fact not set? or is it set with nulls or what is going on here?
>
> Isset will evaluate to false only when a variable is a *PHP* null or it
> is not set. (null anyway too)

OK, I see it now. If I never enter a value in that field, on a 2nd
iteration, the isset() will also evaluate to true. so it does not
matter if I ever enter a value, just the fact that the form returns a
"null" value means the field is actually set for PHP. I guess I can
use the PHP function unset() to delete the variable from the array?

Hmmm back to the drawing board....

This stuff is hard and complicated. :(

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[Message index]

		Not understanding HTML form By: MikeB on Sun, 12 September 2010 18:06
		Re: Not understanding HTML form By: Marious Barrier on Sun, 12 September 2010 18:17
		Re: Not understanding HTML form By: MikeB on Sun, 12 September 2010 18:25
		Re: Not understanding HTML form By: Marious Barrier on Sun, 12 September 2010 18:52
		Re: Not understanding HTML form By: Piyush Gupta on Mon, 13 September 2010 10:44
		Re: Not understanding HTML form By: Jerry Stuckle on Sun, 12 September 2010 18:24

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