Re: Variables - Using The Contents Of A Varibale Name Built Dynamically

You could give the button the same name in each form - only the fields in between the <form</form> tags is actually submitted, then put a hidden field in the form that uniquely identifies the data being submitted. Just a thought... it is what I usually do... Mikey "Jason Teagle" <jason@teagster.co.uk> wrote in message news:20020601092017.9040.qmail@pb1.pair.com... > I have found an alternate way of achieving what I want, but I'm wondering if > there was an easier way. I have a PHP file that builds a Web page that > includes forms. The forms are built dynamically based on the contents of a > file, and thus there may be one or two or more forms on the page at any > time. This means that I have controls named $btnChoice1 (first form), > $btnChoice2 (second form), etc. (radio buttons). All of these forms are of a > similar format, and so lead to the same PHP page in their action - a > parameter is passed in the URL to identify which form it came from. > > When the form passes to its action file, another PHP file, there are two > ways to get form data: $_POST["control_name"] or $control_name. The problem > is, the control name I need has to be built dynamically based on which form > it came from. So I need this: > > $btnName = "btnChoice" . $form_number ; > > But now I have the tricky bit - $_POST[$btnName] doesn't work because it > requires nested substitution of variables, and similarly I can't echo > $btnName because that will of course use "btnChoice2" instead of the > _contents_ of the control named btnChoice2. > > Is it possible to 'dereference' (whatever the term is) the variable name > twice? I tried > > $$btnName > > in the stupid hope that it would first interpret that to > > $btnChoice2 > > and then interpret that to the contents of the control, but of course it > failed. > > I ended up using foreach on $_POST to pull out control names and their > contents, and comparing the control name to my built-up name - but I was > wondering if there's a more elegant way of doing what I wanted? > > Promise my next question to the group will be short {:v) > > > -- > -------------------------------------------- > _ _ > o o Jason Teagle > < jason@teagster.co.uk > v > -------------------------------------------- > >