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Re: Not understanding HTML form [message #169434 is a reply to message #169433]

Sun, 12 September 2010 18:52

Marious Barrier
Messages: 25
Registered: September 2010

Karma:

Junior Member

On 09/12/2010 02:25 PM, MikeB wrote:
> 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?

Nah, don’t do unnecessary things.

> Hmmm back to the drawing board....
>
> This stuff is hard and complicated. :(

Not really, just do this.-

Check if isset($_POST['nameofthepost'])
or just count($_POST) to check if there is any post at all.
and... check the data sent with strlen(). remember, everything sent on
posts appears as strings in the server. You must transform them into
whatever you might need.

And remember, always filter... never trust the client’s input.

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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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